CN109001117A - A method of research macroion photoelectron spectrum - Google Patents
A method of research macroion photoelectron spectrum Download PDFInfo
- Publication number
- CN109001117A CN109001117A CN201810950835.1A CN201810950835A CN109001117A CN 109001117 A CN109001117 A CN 109001117A CN 201810950835 A CN201810950835 A CN 201810950835A CN 109001117 A CN109001117 A CN 109001117A
- Authority
- CN
- China
- Prior art keywords
- voltage
- ion
- current converter
- storage tank
- liquid storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000002186 photoelectron spectrum Methods 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 135
- 238000003384 imaging method Methods 0.000 claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000005040 ion trap Methods 0.000 claims abstract description 16
- 238000010884 ion-beam technique Methods 0.000 claims abstract description 15
- 238000001228 spectrum Methods 0.000 claims abstract description 10
- 239000000284 extract Substances 0.000 claims abstract description 8
- 239000012488 sample solution Substances 0.000 claims abstract description 5
- 230000009471 action Effects 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 14
- 230000003287 optical effect Effects 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 5
- 239000013307 optical fiber Substances 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 description 31
- 238000010586 diagram Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- 238000005452 bending Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 208000033748 Device issues Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007787 electrohydrodynamic spraying Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/73—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using plasma burners or torches
Landscapes
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Plasma & Fusion (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The present invention relates to spectrochemistry field, a method of research macroion photoelectron spectrum presets the voltage for driving quadrupole mass filter according to ionic type in a computer, passes through driving circuit and exports corresponding voltage to quadrupole mass filter；Mass flow controller is adjusted, testing sample solution is injected into liquid storage tank；Opening driver, vibration frequency representative value are 1kHz；The drop ejected enters vacuum chamber, and forms ion packet, then forms ion beam current；Ion beam current passes sequentially through arrival rate imaging disk after ion bunch device, quadrupole mass filter, ion trap and exit lens, and is irradiated with a laser, and light reaction occurs；It adjusts and is applied to potential transfer electron, reflecting electrode, extract the potential on electrode, the ion that light reaction is generated is projected with different rates, and ion motion at most channel disc simultaneously generates signal relevant to position, and the signal is recorded by detector；Detector the data obtained is analyzed, velocity imaging spectrum relevant to ion light reaction is obtained.
Description
Technical field
It can be used in studying compared with multiple types macroion the present invention relates to spectrochemistry field, especially one kind, especially
It is the method that can analyze a kind of research macroion photoelectron spectrum of big charge-mass ratio ion.
Background technique
The device of research molecular optoelectronic spectrum studies the ion beam current of testing molecule in vacuum environment, it usually needs so that
Enter vacuum environment after solution atomization containing sample to be tested, in addition, usually there is mass filter to select in ion beam current
The ingredient of different charge-mass ratios.Quadrupole mass filter for the filtering of vacuum intermediate ion line is usually by the identical circle of 4 sizes
Cylindricality metallic rod composition, metallic rod are parallel to each other and about the substantially symmetrical about its central axis of Ion paths, two mutually diagonal metallic rods
Between be connected, be linked to be a pair of of bar, apply the radiofrequency signal of opposite phase when quadrupole mass filter works on two pairs of bars respectively
And the DC potential of opposite polarity.Ion of the charge-mass ratio in particular range could can be passed through by quadrupole mass filter
The center of charge-mass ratio depend on the amplitude and frequency of radiofrequency signal, the range of charge-mass ratio depend on radiofrequency signal peak-to-peak value with
The ratio of DC potential between bar.Charge-mass ratio spectrum, which usually passes through, to be kept scanning radio frequency vibration in the case where Ratio invariableness described above
Width and DC potential obtain.The maximum value for the charge-mass ratio that can be obtained depends on the maximum value of radio frequency amplitude, and this is limited to
The physical conditions such as power dissipation and voltage breakdown.Quadrupole mass filter method is usually not used for analyzing the ion of high charge-mass ratio,
In order to increase the maximum value for the charge-mass ratio that can be measured, it is necessary to the frequency of radiofrequency signal is reduced, that is, needs new resonant circuit, but
It is that resolution power depends on the number for the radio-frequency cycle that ion is passed through when passing through quadrupole mass filter, and therefore, reduction is penetrated
The method of the frequency of frequency signal can reduce resolution power, in addition, quadrupole mass filter can also be reduced by reducing radio frequency signal frequency
The area of the ion beam cross section in exit reduces the signal strength of ion；Improved method is by fixed quadrupole quality mistake
Filter driving voltage performs a scan to obtain charge-mass ratio spectrum, prior art defect one: in the prior art using frequency scanning
Quadrupole mass filter use sinusoidal drive voltage, include a large amount of harmonic voltage, the ringing effect of generation is stronger, leads to electricity
Corrugating distortion, obtained charge-mass ratio spectrum precision be not high；Prior art defect two: certain devices are in the prior art with electron spray side
Method comes so that the solution atomization containing sample to be tested, there is certain requirement to solvent in solution, i.e., must be polar solvent, and electricity
High voltage must be applied to liquid when spray operations, which has limited the types for the sample that method of electrospraying is applicable in；The prior art lacks
Fall into three: certain devices are by directly applying stressed method to liquid come so that liquid sprays and formed drop in the prior art,
The size-constrained internal diameter in drop spout for the drop that this method generates, i.e., can not form lesser drop, a kind of research
The method of macroion photoelectron spectrum is able to solve problem.
Summary of the invention
To solve the above-mentioned problems, the present invention drives quadrupole mass filter using special voltage waveform, and passes through
Scan frequency is composed to obtain charge-mass ratio, can measure the biggish particle of charge-mass ratio；In addition, using the side of driver and liquid resonant
Method ejects drop, is capable of forming that size is small and uniform drop, and applicable sample scope is wider.
The technical scheme adopted by the invention is that:
The device for studying macroion photoelectron spectrum mainly includes vacuum chamber, liquid drop ejector, ion bunch device, quadrupole
Mass filter, ion trap, air inlet, exit lens, shielding case, velocity imaging disk, laser, multichannel disk, detector, meter
Calculation machine, input/output module, field programmable logic device, D/A converter module, high voltage power supply, driving circuit, vacuum pump group
And ionization device, xyz are three-dimensional coordinate system, the vacuum chamber has starting point and end, the liquid drop ejector connection
In the starting point of vacuum chamber, the starting point of vacuum chamber is equipped with ionization device, and the starting point of vacuum chamber has through-hole, the drop
The drop that injector ejects can be entered vacuum chamber by the through-hole and form ion under the action of the ionization device
Packet, then forms ion beam current under the action of vacuum pump group；The end of vacuum chamber has aperture, and the ion in vacuum chamber can
Enter detector by the aperture, the ion bunch device, quadrupole mass filter, ion trap, exit lens, shielding case,
Velocity imaging disk and multichannel disk are successively respectively positioned in the vacuum chamber, and ion trap is connected with air inlet, and velocity imaging disk is located at
In shielding case, the laser of the laser transmitting can inject velocity imaging disk by shielding case, and the velocity imaging disk is main
Including potential transfer electron, reflecting electrode, electrode and grounding disc are extracted, is applied to potential transfer electron, reflection electricity by adjusting
Potential on pole and extraction electrode, the ion that can generate light reaction are projected with different rates.Liquid drop ejector mainly wraps
Injector shell, driver, liquid storage tank, inlet tube, mass flow controller and drop spray-hole are included, injector shell is cylinder
Shape, driver are disc and to be fixed in injector shell, and liquid storage tank is truncated cone-shaped, one bottom surface of liquid storage tank connect driver,
Another bottom surface has drop spray-hole, and liquid storage tank side wall is connected with mass flow controller by inlet tube, when driver works
When, the volume of the liquid storage tank can generate minor change, and the pore diameter range of the drop spray-hole is 50 microns to 500 micro-
Rice, the volume range of the liquid storage tank are five milliliters to ten milliliters；Driving circuit mainly includes voltage-current converter I, optics
Receiver, multivibrator, filter, frequency divider, voltage amplifier I, voltage amplifier II, voltage-current converter II, electricity
Piezo-electric stream transformer III, voltage-current converter IV, voltage-current converter V, integral amplifier I and integral amplifier
II, computer, input/output module and field programmable logic device successively cable connection, field programmable logic device and
Optical receiver is connected by optical fiber, input/output module, D/A converter module and high voltage power supply successively cable connection, described
High voltage power supply has output head anode and cathode and the respectively input terminal of cable connection voltage-current converter I, voltage-to-current
The output end of the input terminal of the output end cable connection filter of converter I, optical receiver distinguishes cable connection multi-harmonic-oscillations
The input terminal of device and frequency divider, multivibrator output end connect the input terminal of filter, and the output end of frequency divider is separately connected
Voltage-current converter II, voltage-current converter III, voltage-current converter IV and voltage-current converter V it is defeated
Enter end, the equal cable connection integral amplifier I of the output end of voltage-current converter II and voltage-current converter III, voltage-
The output end of current converter IV and voltage-current converter V equal cable connection integral amplifier II, integral amplifier I and product
Divide quadrupole mass filter described in amplifier II difference cable connection；The output end of filter distinguishes cable connection voltage amplifier
The input terminal of I and the input terminal of voltage amplifier II, the output end of voltage amplifier I are separately connected voltage-current converter II
Input terminal and voltage-current converter IV input terminal, the output end of voltage amplifier II distinguishes cable connection voltage-to-current
The input terminal of converter III and the input terminal of voltage-current converter V.
The ejector principle of liquid drop ejector: drop spray-hole is parallel with liquid storage tank liquid level plane under original state；It opens and drives
After dynamic device I and driver II, driver is vibrated with certain frequency, is backhauled with certain period to liquid storage tank outside and inside
It is dynamic, during driver is to liquid storage tank movement outside, liquid storage tank volume enlargement under the action of driver, drop spray-hole
The liquid level at place is bent into liquid storage tank, and liquid level the degree of bending constantly increases with the expansion of liquid storage pool volume；Driver to
During liquid storage tank medial motion, liquid storage tank volume under the action of driver reduces, and curved liquid level receives liquid storage tank
The active force of middle liquid, liquid storage tank is during volume continues reduction under the action of driver, curved liquid level center
It will form a superfine liquid jet；In next vibration period of driver, driver is stored up to liquid storage tank movement outside
Liquid pool volume starts to expand, and most of liquid in the liquid jet for having gone out drop spray-hole plane is retracted liquid storage tank
Interior, the small amount of liquids at the tip of the liquid jet will form a very small drop, so that drop goes out liquid storage tank.
The technical principle of the driving circuit of quadrupole rod mass filter:
Select trapezoidal waveform come the advantages of driving quadrupole rod mass filter: trapezoidal waveform is approximate with sinusoidal waveform, still
Wherein the contribution of harmonic wave is many less, therefore can be avoided most of ringing effect, so that wave distortion is avoided, for trapezoidal wave
Shape, it is trapezoidal under conditions of the time that voltage value is between wave crest and wave crest is twice of the time that voltage value is in wave crest
The harmonic wave of waveform can be minimized.
For driving the generation method of the trapezoidal waveform of quadrupole mass filter:
The driving circuit that quadrupole mass filter is controlled using the field programmable logic device of computer connection, is calculated
Machine calculates the voltage for being proportional to the slope according to the slope of preset trapezoidal waveform, and optical receiver is by field-programmable
The signal that logical device issues is converted to TTL signal, and the TTL signal triggers monostable multivibrator, generates an electricity
Pulse is flowed, for the amplitude proportional of the current impulse in the amplitude of trapezoidal waveform to be generated, filter puts down the current impulse
After, the current impulse is converted into reverse voltage and forward dc voltage, and respectively by voltage amplifier I and voltage
Amplifier II amplification, the voltage determine the slope of trapezoidal waveform to be generated, and the size of DC voltage depends on preset
The frequency and amplitude of trapezoidal waveform.In addition, the signal frequency of field programmable logic device generation frequency reducing half in frequency divider
Input voltage-current converter II, voltage-current converter III, voltage-current converter IV and voltage-current converter afterwards
V。
Final waveform is generated using resulting forward dc voltage and reverse voltage is calculated in above step:
The forward dc voltage is changed into electric current simultaneously in voltage-current converter II and voltage-current converter IV
It is integrated in integral amplifier I and integral amplifier II respectively, the reverse voltage is in voltage-current converter
It is changed into electric current in III and voltage-current converter V and is integrated in integral amplifier I and integral amplifier II respectively,
Integral amplifier I and integral amplifier II generates the high voltage and low-voltage of driving quadrupole mass filter respectively.
Illustrate the generating process of trapezoidal waveform with circulation: setting cycle period as T, in moment t=0, waveform with
Minimum peak value exports, and the frequency signal after frequency dividing switches the polarity of current source constantly, therefore output voltage starts linearly
Increase, at the momentOutput voltage values reach positive rail, and keepTime, at the momentThe frequency of frequency dividing changes
The polarity of change state and switchable current source, output voltage start linear decline and at the momentNegative rail is reached, and is protected
It holdsTime, so far a circulation terminates, and starts next circulation.
A kind of the step of method for studying macroion photoelectron spectrum are as follows:
The ionic type that one, is filtered as needed presets the voltage for driving quadrupole mass filter in a computer,
And corresponding voltage is exported to quadrupole mass filter by driving circuit；
Two, adjust mass flow controller, and testing sample solution is injected liquid storage tank, solution flow velocity representative value be 0.02 to
0.2 ml/min；
Three, opening drivers, vibration frequency representative value are 1kHz；
The drop that four, liquid drop ejectors eject enters vacuum chamber by the through-hole, and in the work of the ionization device
With lower formation ion packet, ion beam current then is formed under the action of the vacuum pump group；
Five, ion beam currents reach speed after passing sequentially through ion bunch device, quadrupole mass filter, ion trap and exit lens
Degree imaging disk, and the laser irradiation issued by laser, occur light reaction；
Six, adjust be applied to potential transfer electron, reflecting electrode, extract electrode on potential, by light reaction generate from
Son is projected with different rates, and ion motion at most channel disc simultaneously generates signal relevant to position, and the signal is by detector
Record；
Seven, analyze detector the data obtained, obtain velocity imaging spectrum relevant to ion light reaction.
The beneficial effects of the present invention are:
Liquid drop ejector in the present invention is capable of forming that size is smaller and uniform drop, and to the pole of testing sample solution
Property no requirement (NR), without applying high voltage to solution when injection, applicable sample type is more, secondly, using trapezoidal waveform voltage
Quadrupole mass filter is driven, particle charge-mass ratio spectrum is obtained by scan frequency, is suitable for charge-mass ratio biggish particle.
Detailed description of the invention
It is further illustrated below with reference to figure of the invention:
Fig. 1 is schematic diagram of the present invention；
Fig. 2 is liquid drop ejector side schematic view；
Fig. 3 is output voltage-operated device schematic diagram；
Fig. 4 to Fig. 9 is drop spray-hole enlarged diagram and ejector principle schematic diagram.
In figure, 1. vacuum chambers, 2. liquid drop ejectors, 2-1. injector shell, 2-2. driver, 2-3. liquid storage tank, 2-4.
Inlet tube, 2-5. mass flow controller, 2-6. drop spray-hole, 3. ion bunch devices, 4. quadrupole mass filters, 5. ions
Trap, 6. air inlets, 7. exit lens, 8 shielding cases, 9. velocity imaging disks, 10. lasers, 11. multichannel disks, 12. detectors,
13. computer, 14. input/output modules, 15. field programmable logic devices, 16. D/A converter modules, 17. high voltage power supplies,
18. driving circuit, 18-1. voltage-current converter I, 18-2. optical receiver, 18-3. multivibrator, 18-4. filtering
Device, 18-5. frequency divider, 18-6. voltage amplifier I, 18-7. voltage amplifier II, 18-8. voltage-current converter II, 18-
9. voltage-current converter III, 18-10. voltage-current converter IV, 18-11. voltage-current converter V, 18-12. product
Divide amplifier I, 18-13. integral amplifier II.
Specific embodiment
If Fig. 1 is schematic diagram of the present invention, xyz is three-dimensional coordinate system, mainly includes vacuum chamber (1), liquid drop ejector
(2), ion bunch device (3), quadrupole mass filter (4), ion trap (5), air inlet (6), exit lens (7), shielding case
(8), velocity imaging disk (9), laser (10), multichannel disk (11), detector (12), computer (13), input/output module
(14), field programmable logic device (15), D/A converter module (16), high voltage power supply (17), driving circuit (18), vacuum pump
Group and ionization device, the vacuum chamber (1) have starting point and end, and the liquid drop ejector (2) is connected to vacuum chamber (1)
Starting point, the starting point of vacuum chamber (1) are equipped with ionization device, and the starting point of vacuum chamber (1) has through-hole, the drop injection
The drop that device (2) ejects can enter vacuum chamber (1) by the through-hole and formed under the action of the ionization device from
Attached bag then forms ion beam current under the action of vacuum pump group；The end of vacuum chamber (1) has aperture, in vacuum chamber (1)
Ion can be entered detector (12) by the aperture, the ion bunch device (3), quadrupole mass filter (4), ion trap
(5), exit lens (7), shielding case (8), velocity imaging disk (9) and multichannel disk (11) are successively respectively positioned on the vacuum chamber (1)
Interior, ion trap (5) is connected with air inlet (6), and velocity imaging disk (9) is located in shielding case (8), laser (10) transmitting
Laser can by shielding case (8) inject velocity imaging disk (9), the velocity imaging disk (9) mainly include potential transfer electron,
Reflecting electrode extracts electrode and grounding disc, by adjusting the electricity being applied on potential transfer electron, reflecting electrode and extraction electrode
Gesture, the ion that can generate light reaction are projected with different rates.
If Fig. 2 is liquid drop ejector side schematic view, liquid drop ejector (2) mainly includes injector shell (2-1), driving
Device (2-2), liquid storage tank (2-3), inlet tube (2-4), mass flow controller (2-5) and drop spray-hole (2-6), outside injector
Shell (2-1) is cylinder, and driver (2-2) is disc and is fixed in injector shell (2-1) that liquid storage tank (2-3) is circle
Platform shape, liquid storage tank (2-3) bottom surface connects driver (2-2), another bottom surface has drop spray-hole (2-6), liquid storage tank (2-3)
Side wall is connected with mass flow controller (2-5) by inlet tube (2-4), when driver (2-2) work, the liquid storage tank
The volume of (2-3) can generate minor change, and the pore diameter range of the drop spray-hole is 50 microns to 500 microns, the storage
The volume range of liquid pool (2-3) is five milliliters to ten milliliters.
If Fig. 3 is output voltage-operated device schematic diagram, corresponding voltage is exported to the quadrupole mass filter (4),
Mainly include computer (13), input/output module (14), field programmable logic device (15), D/A converter module (16),
High voltage power supply (17) and driving circuit (18), driving circuit (18) mainly connect including voltage-current converter I (18-1), optics
Receive device (18-2), multivibrator (18-3), filter (18-4), frequency divider (18-5), voltage amplifier I (18-6), voltage
Amplifier II (18-7), voltage-current converter II (18-8), voltage-current converter III (18-9), Voltage-current conversion
Device IV (18-10), voltage-current converter V (18-11), integral amplifier I (18-12) and integral amplifier II (18-13),
Successively cable connection, field-programmable are patrolled for computer (13), input/output module (14) and field programmable logic device (15)
Volume device (15) are connected with optical receiver (18-2) by optical fiber, input/output module (14), D/A converter module (16) and
Successively cable connection, the high voltage power supply (17) have output head anode and cathode and respectively cable connection to high voltage power supply (17)
The input terminal of voltage-current converter I (18-1), the output end cable connection filter of voltage-current converter I (18-1)
The input terminal of (18-4), output end difference cable connection multivibrator (18-3) and frequency divider of optical receiver (18-2)
The input terminal of (18-5), multivibrator (18-3) output end connect the input terminal of filter (18-4), frequency divider (18-5)
Output end is separately connected voltage-current converter II (18-8), voltage-current converter III (18-9), Voltage-current conversion
The input terminal of device IV (18-10) and voltage-current converter V (18-11), voltage-current converter II (18-8) and electric piezo-electric
The equal cable connection integral amplifier I (18-12) of the output end of stream transformer III (18-9), voltage-current converter IV (18-
10) and the equal cable connection integral amplifier II (18-13) of the output end of voltage-current converter V (18-11), integral amplifier I
Quadrupole mass filter (4) described in (18-12) and integral amplifier II (18-13) difference cable connection；Filter (18-4)
Output end distinguishes the input terminal of cable connection voltage amplifier I (18-6) and the input terminal of voltage amplifier II (18-7), voltage
The output end of amplifier I (18-6) is separately connected the input terminal and voltage-current converter of voltage-current converter II (18-8)
The output end of the input terminal of IV (18-10), voltage amplifier II (18-7) distinguishes cable connection voltage-current converter III
The input terminal of (18-9) and the input terminal of voltage-current converter V (18-11).
If Fig. 4 to Fig. 9 is drop spray-hole enlarged diagram and ejector principle schematic diagram, drop spray-hole (2-6) lower section
For the liquid of liquid storage tank (2-3), arrow indicates the active force of liquid internal in figure, such as Fig. 4, drop spray-hole under original state
(2-6) is parallel with liquid storage tank (2-3) liquid level plane；After opening driver I (2-5) and driver II (2-6), driver is with certain
Frequency vibration, moved back and forth with certain period on the outside of liquid storage tank (2-3) and inside, in driver to liquid storage tank (2-3)
During movement outside, liquid storage tank (2-3) volume enlargement, such as Fig. 5 under the action of driver, at drop spray-hole (2-6)
Liquid level constantly increase to bending, such as Fig. 6, liquid level the degree of bending in liquid storage tank (2-3) with the expansion of liquid storage tank (2-3) volume
Greatly；During driver is to liquid storage tank (2-3) medial motion, liquid storage tank (2-3) volume under the action of driver reduces,
Such as Fig. 7, curved liquid level receives the active force of liquid in liquid storage tank (2-3), and liquid storage tank (2-4) holds under the action of driver
During product continues reduction, such as Fig. 8, curved liquid level center will form a superfine liquid jet；In driver
Next vibration period in, driver starts to expand, will rush to liquid storage tank (2-3) movement outside, liquid storage tank (2-3) volume
Most of liquid in the liquid jet of drop spray-hole (2-6) plane retracts in liquid storage tank (2-3) out, in the liquid
The small amount of liquids at the tip of jet stream will form a very small drop, such as Fig. 9, so that drop goes out liquid storage tank (2-3).This hair
The bright direction of vibration using driver is parallel with the direction that drop sprays, and advantage is that the drop size that ejects is more equal
It is even, in addition, liquid can be sprayed with a variety of vibration modes with the driver of different frequency and amplitude vibration by using two
Drop, to meet different needs, two drivers are in operating mode one with identical frequency and amplitude vibration, in operating mode two
When two drivers are with different frequency and amplitude vibration, the droplet size ejected is not consistent, and the smallest drop can compare
The drop that operating mode one ejects wants small, can be by controlling the pumping speed of vacuum pump group come so that biggish drop and vacuum chamber
Wall collision, so that lesser drop is left in the vacuum chamber, the lesser ion beam current of Formation cross-section product.
The device for studying macroion photoelectron spectrum mainly includes vacuum chamber (1), liquid drop ejector (2), ion bunch
Device (3), quadrupole mass filter (4), ion trap (5), air inlet (6), exit lens (7), shielding case (8), velocity imaging disk
(9), laser (10), multichannel disk (11), detector (12), computer (13), input/output module (14), scene can compile
Journey logical device (15), D/A converter module (16), high voltage power supply (17), driving circuit (18), vacuum pump group and ionization device,
Xyz is three-dimensional coordinate system, and the vacuum chamber (1) has starting point and end, and the liquid drop ejector (2) is connected to vacuum
The starting point of chamber (1), the starting point of vacuum chamber (1) are equipped with ionization device, and the starting point of vacuum chamber (1) has through-hole, described
The drop that liquid drop ejector (2) ejects can be entered vacuum chamber (1) by the through-hole and in the effect of the ionization device
Lower formation ion packet, then forms ion beam current under the action of vacuum pump group；The end of vacuum chamber (1) has aperture, vacuum
Ion in chamber (1) can be entered detector (12) by the aperture, the ion bunch device (3), quadrupole mass filter
(4), ion trap (5), exit lens (7), shielding case (8), velocity imaging disk (9) and multichannel disk (11) are successively respectively positioned on described
In vacuum chamber (1), ion trap (5) is connected with air inlet (6), and velocity imaging disk (9) is located in shielding case (8), the laser
(10) laser emitted can inject velocity imaging disk (9) by shielding case (8), and the velocity imaging disk (9) mainly includes electricity
Gesture transfer electron, extracts electrode and grounding disc at reflecting electrode, is applied to potential transfer electron, reflecting electrode and pumping by adjusting
The potential on electrode is taken, the ion that can generate light reaction is projected with different rates.Liquid drop ejector (2) mainly includes spray
Emitter shell (2-1), driver (2-2), liquid storage tank (2-3), inlet tube (2-4), mass flow controller (2-5) and drop spray
Perforation (2-6), injector shell (2-1) are cylinder, and driver (2-2) is disc and is fixed on injector shell (2-1)
Interior, liquid storage tank (2-3) is truncated cone-shaped, and liquid storage tank (2-3) bottom surface connects driver (2-2), another bottom surface is sprayed with drop
Hole (2-6), liquid storage tank (2-3) side wall is connected with mass flow controller (2-5) by inlet tube (2-4), as driver (2-2)
When work, the volume of the liquid storage tank (2-3) can generate minor change, and the pore diameter range of the drop spray-hole is 50 microns
To 500 microns, the volume range of the liquid storage tank (2-3) is five milliliters to ten milliliters；Driving circuit (18) mainly includes voltage-
Current converter I (18-1), optical receiver (18-2), multivibrator (18-3), filter (18-4), frequency divider (18-
5), voltage amplifier I (18-6), voltage amplifier II (18-7), voltage-current converter II (18-8), Voltage-current conversion
Device III (18-9), voltage-current converter IV (18-10), voltage-current converter V (18-11), integral amplifier I (18-
12) and integral amplifier II (18-13), computer (13), input/output module (14) and field programmable logic device (15)
Successively cable connection, field programmable logic device (15) and optical receiver (18-2) are connected by optical fiber, input/output mould
Successively cable connection, the high voltage power supply (17) have output end for block (14), D/A converter module (16) and high voltage power supply (17)
Anode and cathode and the respectively input terminal of cable connection voltage-current converter I (18-1), voltage-current converter I (18-
1) the output end difference cable connection of the input terminal of output end cable connection filter (18-4), optical receiver (18-2) is more
The input terminal of harmonic oscillator (18-3) and frequency divider (18-5), multivibrator (18-3) output end connect filter (18-4)
Input terminal, the output end of frequency divider (18-5) are separately connected voltage-current converter II (18-8), voltage-current converter III
The input terminal of (18-9), voltage-current converter IV (18-10) and voltage-current converter V (18-11), voltage-to-current turn
The equal cable connection integral amplifier I (18-12) of the output end of parallel operation II (18-8) and voltage-current converter III (18-9), electricity
The equal cable connection integral amplifier II of the output end of piezo-electric stream transformer IV (18-10) and voltage-current converter V (18-11)
Quadrupole mass filter described in (18-13), integral amplifier I (18-12) and integral amplifier II (18-13) difference cable connection
(4)；The input terminal and voltage amplifier II of output end difference cable connection voltage amplifier I (18-6) of filter (18-4)
The output end of the input terminal of (18-7), voltage amplifier I (18-6) is separately connected the input of voltage-current converter II (18-8)
The input terminal at end and voltage-current converter IV (18-10), the output end difference cable connection electricity of voltage amplifier II (18-7)
The input terminal of piezo-electric stream transformer III (18-9) and the input terminal of voltage-current converter V (18-11).
The ejector principle of liquid drop ejector: such as Fig. 4, drop spray-hole (2-6) and liquid storage tank (2-3) liquid level under original state
Plane is parallel；After opening driver I (2-5) and driver II (2-6), driver is vibrated with certain frequency, with certain week
Phase moves back and forth on the outside of liquid storage tank (2-3) and inside, during driver is to liquid storage tank (2-3) movement outside, liquid storage
Pond (2-3) volume enlargement, such as Fig. 5 under the action of driver, the liquid level at drop spray-hole (2-6) is into liquid storage tank (2-3)
Bending, such as Fig. 6, liquid level the degree of bending constantly increase with the expansion of liquid storage tank (2-3) volume；In driver to liquid storage tank
During (2-3) medial motion, liquid storage tank (2-3) under the action of driver volume reduce, such as Fig. 7, curved liquid level by
The active force of liquid in liquid storage tank (2-3) is arrived, liquid storage tank (2-4) volume under the action of driver continues reduced process
In, such as Fig. 8, curved liquid level center will form a superfine liquid jet；In next vibration period of driver
In, driver starts to expand to liquid storage tank (2-3) movement outside, liquid storage tank (2-3) volume, will go out drop spray-hole (2-
6) most of liquid in the liquid jet of plane retracts in liquid storage tank (2-3), in the small of the tip of the liquid jet
Partially liq will form a very small drop, such as Fig. 9, so that drop goes out liquid storage tank (2-3).
The technical principle of the driving circuit of quadrupole rod mass filter:
Select trapezoidal waveform come the advantages of driving quadrupole rod mass filter: trapezoidal waveform is approximate with sinusoidal waveform, still
Wherein the contribution of harmonic wave is many less, therefore can be avoided most of ringing effect, so that wave distortion is avoided, for trapezoidal wave
Shape, it is trapezoidal under conditions of the time that voltage value is between wave crest and wave crest is twice of the time that voltage value is in wave crest
The harmonic wave of waveform can be minimized.
For driving the generation method of the trapezoidal waveform of quadrupole mass filter (4):
The drive of quadrupole mass filter (4) is controlled using the field programmable logic device (15) of computer (13) connection
Dynamic circuit, computer (13) calculate the voltage for being proportional to the slope according to the slope of preset trapezoidal waveform, and optics receives
The signal that field programmable logic device (15) issues is converted to TTL signal by device (18-2), and the TTL signal triggers monostable
Multivibrator (18-3), generate a current impulse, the amplitude proportional of the current impulse is in trapezoidal waveform to be generated
Amplitude, filter (18-4) by the current impulse it is average after, the current impulse is converted into reverse voltage and just
Amplified to DC voltage, and respectively by voltage amplifier I (18-6) and voltage amplifier II (18-7), the voltage determine to
The slope of the trapezoidal waveform of generation, the size of DC voltage depend on the frequency and amplitude of preset trapezoidal waveform.In addition, live
The signal frequency that programmable logic device (15) generates input voltage-current converter after frequency reducing half in frequency divider (18-5)
II (18-8), voltage-current converter III (18-9), voltage-current converter IV (18-10) and voltage-current converter V
(18-11)。
Final waveform is generated using resulting forward dc voltage and reverse voltage is calculated in above step:
The forward dc voltage is in voltage-current converter II (18-8) and voltage-current converter IV (18-10)
It is changed into electric current and is integrated in integral amplifier I (18-12) and integral amplifier II (18-13) respectively, it is described reversed
DC voltage is changed into electric current and difference in voltage-current converter III (18-9) and voltage-current converter V (18-11)
It is integrated in integral amplifier I (18-12) and integral amplifier II (18-13), integral amplifier I (18-12) and integral
Amplifier II (18-13) generates the high voltage and low-voltage of driving quadrupole mass filter (4) respectively.
Illustrate the generating process of trapezoidal waveform with circulation: setting cycle period as T, in moment t=0, waveform with
Minimum peak value exports, and the frequency signal after frequency dividing switches the polarity of current source constantly, therefore output voltage starts linearly
Increase, at the momentOutput voltage values reach positive rail, and keepTime, at the momentThe frequency of frequency dividing changes
The polarity of change state and switchable current source, output voltage start linear decline and at the momentNegative rail is reached, and is protected
It holdsTime, so far a circulation terminates, and starts next circulation.
A kind of the step of method for studying macroion photoelectron spectrum are as follows:
The ionic type that one, is filtered as needed is preset in computer (13) for driving quadrupole mass filter (4)
Voltage, and export corresponding voltage to quadrupole mass filter (4) by driving circuit (18)；
Two, adjust mass flow controller (2-5), testing sample solution are injected liquid storage tank (2-3), solution flow velocity is typical
Value is 0.02 to 0.2 ml/min；
Three, opening drivers (2-2), vibration frequency representative value are 1kHz；
The drop that four, liquid drop ejectors (1) eject is entered vacuum chamber (2) by the through-hole, and is filled in the ionization
Ion packet is formed under the action of setting, and then forms ion beam current under the action of the vacuum pump group；
It is saturating that five, ion beam currents pass sequentially through ion bunch device (3), quadrupole mass filter (4), ion trap (5) and outgoing
Mirror (7) arrival rate imaging disk (9) afterwards, and the laser irradiation issued by laser (10), occur light reaction；
Six, adjust be applied to potential transfer electron, reflecting electrode, extract electrode on potential, by light reaction generate from
Son is projected with different rates, and ion motion at most channel disc (11) simultaneously generates signal relevant to position, and the signal is visited
Survey device (12) record；
Seven, analyze detector (12) the data obtained, obtain velocity imaging spectrum relevant to ion light reaction.
The present invention ejects drop using the method for driver and liquid resonant, and the direction of vibration and drop of driver spray
Direction out is parallel, is capable of forming that size is smaller and uniform drop, and solvent needs not to be polar, without right in course of injection
Solution applies high voltage, and applicable macromolecular species are more, secondly, special waveform voltage drives quadrupole mass filter,
Charge-mass ratio spectrum is obtained by scan frequency, can measure the biggish particle of charge-mass ratio, and can be by selecting suitable waveform
Harmonic wave in voltage is minimized, obtains higher signal resolution by the rising of voltage and fall time.
Claims (1)
1. the device of a kind of method for studying macroion photoelectron spectrum, research macroion photoelectron spectrum mainly includes true
Cavity (1), ion bunch device (3), quadrupole mass filter (4), ion trap (5), air inlet (6), goes out liquid drop ejector (2)
Penetrate lens (7), shielding case (8), velocity imaging disk (9), laser (10), multichannel disk (11), detector (12), computer
(13), input/output module (14), field programmable logic device (15), D/A converter module (16), high voltage power supply (17),
Driving circuit (18), vacuum pump group and ionization device, xyz are three-dimensional coordinate system, the vacuum chamber (1) have starting point and
End, the liquid drop ejector (2) are connected to the starting point of vacuum chamber (1), and the starting point of vacuum chamber (1) is equipped with ionization dress
Set, the starting point of vacuum chamber (1) has a through-hole, the drop that the liquid drop ejector (2) is ejected can by the through-hole into
Enter vacuum chamber (1) and form ion packet under the action of the ionization device, then forms ion under the action of vacuum pump group
Line；The end of vacuum chamber (1) has aperture, and the ion in vacuum chamber (1) can be entered detector (12) by the aperture,
The ion bunch device (3), quadrupole mass filter (4), ion trap (5), exit lens (7), shielding case (8), velocity imaging
Disk (9) and multichannel disk (11) are successively respectively positioned in the vacuum chamber (1), and ion trap (5) is connected with air inlet (6), speed at
As disk (9) are located at, shielding case (8) is interior, and the laser of laser (10) transmitting can pass through shielding case (8) and inject velocity imaging
Disk (9), the velocity imaging disk (9) mainly include potential transfer electron, reflecting electrode, extract electrode and grounding disc, pass through tune
Section is applied to potential transfer electron, reflecting electrode and extracts the potential on electrode, and the ion that can generate light reaction is with difference
Rate project；Liquid drop ejector (2) mainly includes injector shell (2-1), driver (2-2), liquid storage tank (2-3), feed liquor
(2-4), mass flow controller (2-5) and drop spray-hole (2-6) are managed, injector shell (2-1) is cylinder, driver
(2-2) is disc and is fixed in injector shell (2-1), and liquid storage tank (2-3) is truncated cone-shaped, liquid storage tank (2-3) bottom surface
Connection driver (2-2), another bottom surface have drop spray-hole (2-6), and liquid storage tank (2-3) side wall is connected by inlet tube (2-4)
It is connected to mass flow controller (2-5), when driver (2-2) work, the volume of the liquid storage tank (2-3) can generate small
Variation, the pore diameter range of the drop spray-hole are 50 microns to 500 microns, and the volume range of the liquid storage tank (2-3) is five
Milliliter is to ten milliliters；Driving circuit (18) mainly includes voltage-current converter I (18-1), optical receiver (18-2), multi resonant
Oscillator (18-3), filter (18-4), frequency divider (18-5), voltage amplifier I (18-6), voltage amplifier II (18-7),
Voltage-current converter II (18-8), voltage-current converter III (18-9), voltage-current converter IV (18-10), electricity
Piezo-electric stream transformer V (18-11), integral amplifier I (18-12) and integral amplifier II (18-13), it is computer (13), defeated
Enter/output module (14) and field programmable logic device (15) successively cable connection, field programmable logic device (15) and
Optical receiver (18-2) is connected by optical fiber, input/output module (14), D/A converter module (16) and high voltage power supply (17)
Successively cable connection, the high voltage power supply (17) have output head anode and cathode and respectively cable connection Voltage-current conversion
The input terminal of device I (18-1), the input terminal of the output end cable connection filter (18-4) of voltage-current converter I (18-1),
The input terminal of output end difference cable connection multivibrator (18-3) and frequency divider (18-5) of optical receiver (18-2) are more
Harmonic oscillator (18-3) output end connects the input terminal of filter (18-4), and the output end of frequency divider (18-5) is separately connected electricity
Piezo-electric stream transformer II (18-8), voltage-current converter III (18-9), voltage-current converter IV (18-10) and electricity
The input terminal of piezo-electric stream transformer V (18-11), voltage-current converter II (18-8) and voltage-current converter III (18-
9) the equal cable connection integral amplifier I (18-12) of output end, voltage-current converter IV (18-10) and voltage-to-current turn
The equal cable connection integral amplifier II (18-13) of the output end of parallel operation V (18-11), integral amplifier I (18-12) and integral are put
Quadrupole mass filter (4) described in big device II (18-13) difference cable connection；The output end difference cable of filter (18-4) connects
The input terminal of voltage amplifier I (18-6) and the input terminal of voltage amplifier II (18-7) are connect, voltage amplifier I's (18-6) is defeated
Outlet is separately connected the input of the input terminal and voltage-current converter IV (18-10) of voltage-current converter II (18-8)
End, the input terminal and electricity of output end difference cable connection voltage-current converter III (18-9) of voltage amplifier II (18-7)
The input terminal of piezo-electric stream transformer V (18-11),
It is characterized in that: a kind of the step of method for studying macroion photoelectron spectrum are as follows:
The ionic type that one, is filtered as needed presets the electricity for driving quadrupole mass filter (4) in computer (13)
Pressure, and corresponding voltage is exported to quadrupole mass filter (4) by driving circuit (18)；
Two, adjust mass flow controller (2-5), testing sample solution are injected liquid storage tank (2-3), solution flow velocity representative value is
0.02 to 0.2 ml/min；
Three, opening drivers (2-2), vibration frequency representative value are 1kHz；
The drop that four, liquid drop ejectors (1) eject enters vacuum chamber (2) by the through-hole, and in the ionization device
Ion packet is formed under effect, then forms ion beam current under the action of the vacuum pump group；
Five, ion beam currents pass sequentially through ion bunch device (3), quadrupole mass filter (4), ion trap (5) and exit lens (7)
Arrival rate imaging disk (9) afterwards, and the laser irradiation issued by laser (10), occur light reaction；
Six, adjust be applied to potential transfer electron, reflecting electrode, extract electrode on potential, by light reaction generate ion with
Different rates projects, and ion motion at most channel disc (11) simultaneously generates signal relevant to position, and the signal is by detector
(12) it records；
Seven, analyze detector (12) the data obtained, obtain velocity imaging spectrum relevant to ion light reaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810950835.1A CN109001117A (en) | 2018-08-09 | 2018-08-09 | A method of research macroion photoelectron spectrum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810950835.1A CN109001117A (en) | 2018-08-09 | 2018-08-09 | A method of research macroion photoelectron spectrum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109001117A true CN109001117A (en) | 2018-12-14 |
Family
ID=64593486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810950835.1A Pending CN109001117A (en) | 2018-08-09 | 2018-08-09 | A method of research macroion photoelectron spectrum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109001117A (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1346393A (en) * | 1971-03-08 | 1974-02-06 | Unisearch Ltd | Means for effecting improvements to mass spectrometers and mass filters |
| US20030122889A1 (en) * | 2001-12-03 | 2003-07-03 | Fuji Xerox Co., Ltd. | Droplet ejecting head, method for driving the same, and droplet ejecting apparatus |
| JP2005305912A (en) * | 2004-04-23 | 2005-11-04 | Konica Minolta Holdings Inc | Driving method of liquid drop ejection head |
| CN101075546A (en) * | 2007-05-17 | 2007-11-21 | 上海华质生物技术有限公司 | Ion-quality filter and its filtering method |
| JP2008168533A (en) * | 2007-01-12 | 2008-07-24 | Canon Inc | Liquid delivering method and liquid delivering apparatus |
| CN102324372A (en) * | 2011-06-24 | 2012-01-18 | 中国科学院化学研究所 | Method for controlling mass analysis device by utilizing triangular wave signals |
| CN103492184A (en) * | 2011-04-19 | 2014-01-01 | 佳能株式会社 | Method of driving liquid ejection head and liquid ejection apparatus |
| CN103762149A (en) * | 2013-12-31 | 2014-04-30 | 华中科技大学 | Device for improving electron velocity imaging resolution |
| US20150357176A1 (en) * | 2012-09-25 | 2015-12-10 | Yoshinori Sano | Mass analysis device and mass separation device |
| CN105164783A (en) * | 2013-04-30 | 2015-12-16 | 佳能株式会社 | Liquid droplet injecting apparatus and ion source |
| WO2016073850A1 (en) * | 2014-11-07 | 2016-05-12 | Indiana University Research And Technology Corporation | A frequency and amplitude scanned quadrupole mass filter and methods |
| CN106710378A (en) * | 2015-11-17 | 2017-05-24 | 中国科学院大连化学物理研究所 | Full automatic control system for femtosecond time-resolved photoelectron/ion velocity imaging |
| CN106896089A (en) * | 2015-12-17 | 2017-06-27 | 中国科学院大连化学物理研究所 | A kind of photoelectronic imaging device based on electric spray ion source |
| CN107275181A (en) * | 2017-04-26 | 2017-10-20 | 苏州安益谱精密仪器有限公司 | One kind is used to drive mass spectrometric sine wave freuqency scanning means |
| CN107564797A (en) * | 2017-08-02 | 2018-01-09 | 金华职业技术学院 | A kind of method studied ionic light and excite rear product |
| WO2018046905A1 (en) * | 2016-09-06 | 2018-03-15 | Micromass Uk Limited | Quadrupole devices |
-
2018
- 2018-08-09 CN CN201810950835.1A patent/CN109001117A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1346393A (en) * | 1971-03-08 | 1974-02-06 | Unisearch Ltd | Means for effecting improvements to mass spectrometers and mass filters |
| US20030122889A1 (en) * | 2001-12-03 | 2003-07-03 | Fuji Xerox Co., Ltd. | Droplet ejecting head, method for driving the same, and droplet ejecting apparatus |
| JP2005305912A (en) * | 2004-04-23 | 2005-11-04 | Konica Minolta Holdings Inc | Driving method of liquid drop ejection head |
| JP2008168533A (en) * | 2007-01-12 | 2008-07-24 | Canon Inc | Liquid delivering method and liquid delivering apparatus |
| CN101075546A (en) * | 2007-05-17 | 2007-11-21 | 上海华质生物技术有限公司 | Ion-quality filter and its filtering method |
| CN103492184A (en) * | 2011-04-19 | 2014-01-01 | 佳能株式会社 | Method of driving liquid ejection head and liquid ejection apparatus |
| CN102324372A (en) * | 2011-06-24 | 2012-01-18 | 中国科学院化学研究所 | Method for controlling mass analysis device by utilizing triangular wave signals |
| US20150357176A1 (en) * | 2012-09-25 | 2015-12-10 | Yoshinori Sano | Mass analysis device and mass separation device |
| CN105164783A (en) * | 2013-04-30 | 2015-12-16 | 佳能株式会社 | Liquid droplet injecting apparatus and ion source |
| CN103762149A (en) * | 2013-12-31 | 2014-04-30 | 华中科技大学 | Device for improving electron velocity imaging resolution |
| WO2016073850A1 (en) * | 2014-11-07 | 2016-05-12 | Indiana University Research And Technology Corporation | A frequency and amplitude scanned quadrupole mass filter and methods |
| CN106710378A (en) * | 2015-11-17 | 2017-05-24 | 中国科学院大连化学物理研究所 | Full automatic control system for femtosecond time-resolved photoelectron/ion velocity imaging |
| CN106896089A (en) * | 2015-12-17 | 2017-06-27 | 中国科学院大连化学物理研究所 | A kind of photoelectronic imaging device based on electric spray ion source |
| WO2018046905A1 (en) * | 2016-09-06 | 2018-03-15 | Micromass Uk Limited | Quadrupole devices |
| CN107275181A (en) * | 2017-04-26 | 2017-10-20 | 苏州安益谱精密仪器有限公司 | One kind is used to drive mass spectrometric sine wave freuqency scanning means |
| CN107564797A (en) * | 2017-08-02 | 2018-01-09 | 金华职业技术学院 | A kind of method studied ionic light and excite rear product |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108801922A (en) | A kind of device of research macroion photoelectron spectrum | |
| DE19511333C1 (en) | Method and device for orthogonal injection of ions into a time-of-flight mass spectrometer | |
| US5739530A (en) | Method and device for the introduction of ions into quadrupole ion traps | |
| CN108221068B (en) | near-field electrospinning jet printing effect online detection and regulation and control method based on machine vision | |
| Bober et al. | Pulsating electrohydrodynamic cone-jets: from choked jet to oscillating cone | |
| US12040171B1 (en) | Focused acoustic radiation for rapid sequential ejection of subwavelength droplets | |
| GB2412491A (en) | Producing a monoenergetic ion beam | |
| CN103419492B (en) | Ink-jet recording apparatus | |
| CN102067275A (en) | Mass analyzer | |
| CN109187458B (en) | Gas phase molecular fluorescence test method | |
| CN208805458U (en) | A kind of device for studying macroion photoelectron spectrum | |
| CN115668440A (en) | Identification of the first sample in a series of consecutive samples | |
| CN109001117A (en) | A method of research macroion photoelectron spectrum | |
| CN112746339A (en) | Low-filtration-resistance fiber membrane electrospinning device and preparation method thereof | |
| CN208985949U (en) | A kind of light reaction detection device | |
| CN108987241B (en) | Molecular light reaction testing device | |
| CN109300768B (en) | Photoreaction detection method | |
| CN109300766B (en) | Molecular photoreaction testing method | |
| CN109239175A (en) | A method of it is detected for macroion | |
| CN109192648B (en) | Free radical photo-product testing method | |
| CN112885701B (en) | Ion filtering device and method | |
| CN108828053A (en) | A kind of tandem mass spectrum for macroion detection | |
| CN112179893B (en) | Nanoparticle surface plasmon field distribution detection method based on velocity image | |
| CN208889604U (en) | A kind of molecule light reaction test device | |
| CN109300767B (en) | Photoreaction detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |