CN208937465U - A kind of particle imaging device - Google Patents
A kind of particle imaging device Download PDFInfo
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- CN208937465U CN208937465U CN201821426509.2U CN201821426509U CN208937465U CN 208937465 U CN208937465 U CN 208937465U CN 201821426509 U CN201821426509 U CN 201821426509U CN 208937465 U CN208937465 U CN 208937465U
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- 238000003384 imaging method Methods 0.000 title claims abstract description 45
- 239000002245 particle Substances 0.000 title claims abstract description 11
- 238000009833 condensation Methods 0.000 claims abstract description 40
- 230000005494 condensation Effects 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 238000003860 storage Methods 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 239000012159 carrier gas Substances 0.000 claims description 38
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 16
- 230000003287 optical effect Effects 0.000 claims description 15
- 238000010884 ion-beam technique Methods 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000001307 helium Substances 0.000 claims description 8
- 229910052734 helium Inorganic materials 0.000 claims description 8
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 8
- 238000010025 steaming Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 238000001704 evaporation Methods 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 133
- 150000002500 ions Chemical class 0.000 description 34
- 230000005611 electricity Effects 0.000 description 8
- 239000012488 sample solution Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
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Abstract
The utility model relates to particle imaging fields, a kind of particle imaging device, including cluster source, vacuum chamber, current divider, ion lens I, gate valve I, ion lens II, gate valve II, mass filter, micro-channel disc I, shielding case, voltage reference tube, velocity imaging electrode group, micro-channel disc II, detector, laser I and vacuum pump group, cluster source includes liquid storage tank, flow controller, sample feeding pipe, tracheae, air accumulator, protect chamber, condensation chamber, heater, sample cavity, spout and laser II, for studying the light reaction of the macromolecular cluster of doping, air accumulation and laser evaporation method are combined to generate the macromolecular cluster of doping, the metering controllable precise adulterated in cluster, and it can quickly be cooled after cluster generation, the method that crush-cutting changes is powered on using electrode effectively to assemble cluster, light reaction It is high-efficient.
Description
Technical field
It is especially a kind of for studying the light reaction of the macromolecular cluster of doping the utility model relates to particle imaging field
A kind of particle imaging device.
Background technique
The molecular cluster of doping refers to mixes other one or more molecules in the cluster of a certain molecule, is changing
, biology have important research significance in environmentology, and many of prior art method can be used in generating cluster, such as
The methods of laser evaporation, air accumulation, ion sputtering, electron spray, wherein air accumulation and laser evaporation method are commonly used in production
Raw biggish cluster, prior art defect one: the formation of certain clusters needs the doping molecule comprising controllably measuring, the prior art
Accurate control relatively difficult to achieve to doping molecule metering；Prior art defect two: the laser evaporation cluster source that the prior art uses
The cluster ions of generation are difficult to cool down, and influence subsequent experimental effect；Prior art defect three: largely clusters are in progress light reaction
It needs to assemble as far as possible to increase response intensity when being irradiated with a laser, the prior art is not ideal enough to the congregational rate of cluster, institute
It states a kind of particle imaging device and is able to solve problem.
Utility model content
To solve the above-mentioned problems, the utility model combines air accumulation and laser evaporation method to generate the big of doping
Molecular cluster, the metering controllable precise of doping, and cluster can quickly be cooled after generating, in addition, can carry out to cluster
Effectively aggregation, so that light reaction has greater efficiency.
The technical scheme adopted by the utility model is
A kind of particle imaging device mainly includes cluster source, vacuum chamber, current divider, ion lens I, gate valve I, ion
Lens II, gate valve II, mass filter, micro-channel disc I, shielding case, voltage reference tube, velocity imaging electrode group, micro-channel disc
II, detector, laser I and vacuum pump group, xyz are three-dimensional coordinate system, and the vacuum chamber has starting point and end, very
Cluster source is connected on the outside of cavity starting point, detector is located on the outside of vacuum chamber end, can detect micro-channel disc I and micro-channel disc
The optical signal generated on II is divided into vacuum zone I, vacuum zone II, vacuum zone III and vacuum from vacuum chamber starting point to end
Section IV, vacuum zone I and vacuum zone II are connected by current divider, and vacuum zone II is connected with vacuum zone III by gate valve I, vacuum zone
III is connected with vacuum zone IV by gate valve II, and the vacuum zone I, vacuum zone II, vacuum zone III and vacuum zone IV are respectively connected with
Vacuum pump group, ion lens I are located in vacuum zone II, and ion lens II is located in vacuum zone III, mass filter, microchannel
Disk I and shielding case are sequentially located in vacuum zone IV, and voltage reference tube, velocity imaging electrode group and micro-channel disc II are sequentially located at screen
It covers in cover, the current divider, ion lens I, gate valve I, ion lens II, gate valve II, mass filter, micro-channel disc I, benchmark
Voltage pipe, velocity imaging electrode group and micro-channel disc II constitute ion beam current path, micro-channel disc I and the equal energy of micro-channel disc II
The ion beam current path is enough removed or moves into, laser I is located at the outside of the vacuum chamber of velocity imaging electrode group position,
Vacuum chamber and shielding case all have optical transmission window, the laser of laser I transmitting can by the optical transmission window admission velocity at
As electrode group；Cluster source mainly includes liquid storage tank, flow controller, sample feeding pipe, tracheae, air accumulator, protection chamber, condensation chamber, adds
Hot device, sample cavity, spout and laser II, the protection chamber are connected to the vacuum zone I of vacuum chamber starting point, the condensation chamber position
In protecting intracavitary portion, condensation chamber is the cylindrical shape that length is 20 centimetres, internal diameter is 12 centimetres, and the condensation chamber has the double-deck chamber
Wall, the space between the double-deck cavity wall can be passed through liquid nitrogen for cooling down, and condensation chamber is connected with spout, and the sample cavity is located at condensation
Intracavitary portion, sample cavity are the cylindrical shapes that length is 6 centimetres, internal diameter is 3.5 centimetres, and sample cavity has outer chamber wall and internal chamber wall, institute
Internal chamber wall is stated with several mesh, the mesh diameter is 50 microns, between adjoining cells between be divided into 150 microns, enable to
Carrier gas stream more uniformly enters sample cavity, and doped samples are placed in sample cavity, and sample cavity has outlet, described sample feeding pipe one end
Liquid storage tank is connected by flow controller, the other end sequentially passes through protection chamber cavity wall, the outer chamber wall of condensation chamber cavity wall and sample cavity
And be connected between the outer chamber wall of sample cavity and internal chamber wall, air accumulator is connected between flow controller and protection chamber by tracheae
Sample feeding pipe on, each junction of sample feeding pipe and protection chamber cavity wall, condensation chamber cavity wall and sample cavity outer chamber wall all has air-tightness,
The periphery of part sample feeding pipe in condensation chamber has heater；It is stored in the liquid storage tank to cluster sample, liquid storage tank
Temperature can be adjusted in -50 to 250 degree Celsius ranges, store carrier gas in the air accumulator, and carrier gas is the mixed of argon gas and helium
The mass ratio of conjunction gas, argon gas and helium is 8: 92, makes it possible to have preferable cooling effect in the reaction that cluster is formed,
Air accumulator can control the flow velocity of carrier gas, the carrier gas with after the steam of cluster sample mixes, enter together in sample feeding pipe
Between the outer chamber wall and internal chamber wall of sample cavity, sample cavity can be entered by the mesh on sample cavity internal chamber wall；The protection chamber,
Condensation chamber and sample cavity all have vacuum window, and the laser of laser II transmitting can enter sample by each vacuum window
Chamber melt steaming to doped samples, the steam of doped samples with after the steam of cluster sample is sufficiently mixed in sample cavity,
Sample cavity outlet is passed sequentially through under the action of carrier gas and spout enters the vacuum zone I of vacuum chamber；When the macromolecular cluster of doping
At the time of into voltage reference tube, the potential of voltage reference tube is zero, when the macromolecular cluster of doping is entirely located in reference voltage
When in pipe, the potential of voltage reference tube is switched to consistent with the potential of the reflecting electrode of velocity imaging electrode group；Voltage reference tube
It is the cylindrical shape that length is 20 millimeters, internal diameter is 12 millimeters, is made of copper, voltage reference tube has entrance and exit, benchmark electricity
The inlet diameter of pressure pipe is 1.5 millimeters, outlet diameter is 1.0 millimeters, and the potential on voltage reference tube can be opposite according to ion
Switch in the position of voltage reference tube.
Generate the principle of the macromolecular cluster of doping:
Cluster source usually has the lower sample cavity of temperature, and the higher steam to cluster sample of temperature is by carrier gas
Body generate colder environment in agglomerate, in sample cavity with doped samples steam, to cluster sample steam and
The steam generation of doped samples is at nuclear reaction and forms cluster, and subsequent cluster leaves cluster source with carrier gas stream, forms continuous point
Sub- cluster stream.Liquid storage tank temperature is adjusted, the vapour pressure to cluster sample solution in liquid storage tank, flow controller energy can be changed
Enough to adjust the flow velocity for entering sample feeding pipe to the steam of cluster sample, air accumulator can adjust the flow velocity into the carrier gas of sample feeding pipe,
The carrier gas enters between the outer chamber wall and internal chamber wall of sample cavity after mixing with described in sample feeding pipe after cluster sample vapors, and
Enter sample cavity by the mesh on sample cavity internal chamber wall, laser II emission pulse laser to the doped samples in sample cavity into
Row melts the vapour pressure for steaming the steam that the power that pulse laser is adjusted to generate the steam of doped samples can change doped samples；
Sample cavity temperature is adjusted, the reaction rate of the steam of the steam and doped samples to cluster sample can be controlled, it is generally the case that
Vapour pressure to cluster sample solution is bigger, and the macromolecular cluster size of generation is bigger, and the flow velocity of carrier gas is smaller, and big point of generation
Sub- cluster size is bigger, and sample cavity temperature and the temperature of the steam to cluster sample are closer, and the metering of molecule is adulterated in cluster
Bigger, the power of pulse laser is bigger, and the metering that molecule is adulterated in cluster is bigger, in conclusion by adjusting to cluster sample
The vapour pressure of solution, to the flow velocity of cluster sample vapors, the flow velocity of carrier gas, doped samples steam vapour pressure and sample cavity
Temperature can control the size of the macromolecular cluster of generation and wherein adulterate the metering of molecule.
The principle that cluster is assembled:
Voltage reference tube is the cylindrical shape that length is 20 millimeters, internal diameter is 12 millimeters, is made of copper, and has entrance and goes out
Mouthful, the inlet diameter is 1.5 millimeters, outlet diameter is 1.0 millimeters, and velocity imaging electrode group is one group and arranges along z positive direction
Concentric metal ring electrode, be followed successively by reflecting electrode, electrostatic attraction electrode, guard electrode and bucking electrode along z positive direction, rolling into a ball
When cluster ion passes through velocity imaging electrode group, by adjusting the potential being applied in reflecting electrode, electrostatic attraction electrode and guard electrode
To achieve the purpose that control the cluster direction of motion；The effect of voltage reference tube is to will be by the reflection of velocity imaging electrode group
The cluster of pole is pre-processed, to prevent cluster from defocusing, at the time of ion enters voltage reference tube, and the potential of voltage reference tube
It is zero, when ion is entirely located in voltage reference tube, the potential of voltage reference tube is switched to anti-with velocity imaging electrode group
The potential of radio pole is consistent, the beneficial effect is that cluster ions can be focused preferably.
The step of being studied using a kind of particle imaging device are as follows:
One, is passed through liquid nitrogen cooling between the double-deck cavity wall of condensation chamber；
Two, adjust heater, so that sample cavity temperature is maintained between -20 to 20 degrees Celsius；
Three, adjust liquid storage tank temperature, so that generating steam to cluster sample solution in liquid storage tank, adjust flow control
Device, so that the steam to cluster sample enters sample feeding pipe, flow velocity representative value is 50SCCM, air accumulator is opened, so that carrier gas
Enter sample feeding pipe by tracheae, flow velocity representative value is 300SCCM；
Carrier gas described in four, enters the outer chamber wall of sample cavity and interior after mixing with described in sample feeding pipe after cluster sample vapors
Between cavity wall, and sample cavity is entered by the mesh on sample cavity internal chamber wall, air pressure representative value is 100Pa in sample cavity；
Five, laser II emission pulse lasers carry out the doped samples in sample cavity to melt steaming, the power allusion quotation of pulse laser
Offset is 2 to 10mJ；
Six, wait for cluster sample steam and doped samples steam generation at nuclear reaction, generate the macromolecular cluster of doping,
The macromolecular cluster of the doping passes sequentially through sample cavity outlet and spout enters the vacuum of vacuum chamber under the action of carrier gas stream
Section I；
Seven, doping macromolecular cluster under the action of vacuum pump group, pass sequentially through current divider, ion lens I, gate valve I,
Ion lens II and gate valve II reaches mass filter, and charge-mass ratio selection is carried out in mass filter, so as to be ground
The macromolecular cluster for the doping studied carefully passes through mass filter；
Micro-channel disc I is moved into ion beam current path by eight, micro-channel disc II is removed ion beam current path, through g-load matter
Macromolecular cluster than the doping of selection is incident on micro-channel disc I, and generates corresponding light letter in the different location of micro-channel disc I
Number, the optical signal generated on micro-channel disc I can pass through voltage reference tube and velocity imaging electrode group and enter detector, thus
Obtain the information of the correlation properties for the macromolecular cluster adulterated before light reaction；
Micro-channel disc I is removed ion beam current path by nine, micro-channel disc II is moved into ion beam current path, when doping
At the time of macromolecular cluster enters voltage reference tube, the potential of voltage reference tube is zero, when the macromolecular cluster whole position of doping
When in voltage reference tube, the potential of voltage reference tube is switched to consistent with the potential of the reflecting electrode of velocity imaging electrode group；
After the macromolecular cluster of ten, doping leaves voltage reference tube, admission velocity imaging electrode group, and sent out by laser I
The laser irradiation penetrated, so that light reaction occur；
The product that 11, light reactions generate reaches micro-channel disc II, and generates accordingly in the different location of micro-channel disc II
Optical signal；
12, detectors collect the optical signal that micro-channel disc II is generated, thus obtain the correlation properties of light reaction product
Information.
The beneficial effects of the utility model are:
The metering controllable precise that adulterates in the macromolecular cluster that the utility model generates, and cluster generate after cooling time compared with
Short, in addition, can effectively be assembled to cluster, light reaction efficiency is higher.
Detailed description of the invention
It is further illustrated below with reference to the figure of the utility model:
Fig. 1 is utility model diagram；
Fig. 2 is cluster source enlarged diagram.
In figure, 1. cluster sources, 1-1. liquid storage tank, 1-2. flow controller, 1-3. sample feeding pipe, 1-4. tracheae, 1-5. gas storage
Tank, 1-6. exocoel, the inner cavity 1-7., 1-8. heater, 1-9. sample cavity, 1-10. spout, 1-11. laser II, 2. vacuum chambers,
2-1. vacuum zone I, 2-2. vacuum zone II, 2-3. vacuum zone III, 2-4. vacuum zone IV, 3. current dividers, 4. ion lens I, 5.
Valve I, 6. ion lens II, 7. gate valve II, 8. mass filters, 9. micro-channel disc I, 10. shielding cases, 11. voltage reference tubes,
12. velocity imaging electrode group, 13. micro-channel disc II, 14. detectors, 15. laser I.
Specific embodiment
If Fig. 1 is utility model diagram, xyz is three-dimensional coordinate system, including cluster source (1), vacuum chamber (2),
Current divider (3), ion lens I (4), gate valve I (5), ion lens II (6), gate valve II (7), mass filter (8), microchannel
Disk I (9), shielding case (10), voltage reference tube (11), velocity imaging electrode group (12), micro-channel disc II (13), detector
(14), laser I (15) and vacuum pump group, the vacuum chamber (2) have starting point and end, vacuum chamber (2) starting point outside
It connects cluster source (1), detector (14) is located on the outside of vacuum chamber (2) end, can detect micro-channel disc I (9) and micro-channel disc
The optical signal generated on II (13) is divided into vacuum zone I (2-1), vacuum zone II (2- from vacuum chamber (2) starting point to end
2), vacuum zone III (2-3) and vacuum zone IV (2-4), vacuum zone I (2-1) and vacuum zone II (2-2) are connected by current divider (3)
It connects, vacuum zone II (2-2) and vacuum zone III (2-3) are connected by gate valve I (5), vacuum zone III (2-3) and vacuum zone IV (2-
4) it is connected by gate valve II (7), the vacuum zone I (2-1), vacuum zone II (2-2), vacuum zone III (2-3) and vacuum zone IV
(2-4) is respectively connected with vacuum pump group, and ion lens I (4) is located in vacuum zone II (2-2), and ion lens II (6) is located at vacuum zone
In III (2-3), mass filter (8), micro-channel disc I (9) and shielding case (10) are sequentially located in vacuum zone IV (2-4), benchmark
Voltage pipe (11), velocity imaging electrode group (12) and micro-channel disc II (13) are sequentially located in shielding case (10), the current divider
(3), ion lens I (4), gate valve I (5), ion lens II (6), gate valve II (7), mass filter (8), micro-channel disc I (9),
Voltage reference tube (11), velocity imaging electrode group (12) and micro-channel disc II (13) constitute ion beam current path, micro-channel disc I
(9) and micro-channel disc II (13) can remove or move into the ion beam current path, and laser I (15) is located at velocity imaging electricity
The outside of the vacuum chamber (2) of pole group (12) position, vacuum chamber (2) and shielding case (10) all have optical transmission window, laser I
(15) laser emitted can pass through the optical transmission window admission velocity imaging electrode group (12)；When doping macromolecular cluster into
At the time of entering voltage reference tube (11), the potential of voltage reference tube (11) is zero, when the macromolecular cluster of doping is entirely located in base
When quasi- voltage pipe (11) is interior, the potential of voltage reference tube (11) is switched to the electricity with the reflecting electrode of velocity imaging electrode group (12)
Gesture is consistent；Voltage reference tube (11) is the cylindrical shape that length is 20 millimeters, internal diameter is 12 millimeters, is made of copper, voltage reference tube
(11) there is entrance and exit, the inlet diameter of voltage reference tube (11) is 1.5 millimeters, outlet diameter is 1.0 millimeters, benchmark electricity
Potential in pressure pipe (11) can switch according to ion relative to the position of voltage reference tube (11).
If Fig. 2 is cluster source enlarged diagram, cluster source (1) mainly include liquid storage tank (1-1), flow controller (1-2),
Sample feeding pipe (1-3), tracheae (1-4), air accumulator (1-5), protection chamber (1-6), condensation chamber (1-7), heater (1-8), sample cavity
(1-9), spout (1-10) and laser II (1-11), protection chamber (1-6) are connected to the vacuum zone of vacuum chamber (2) starting point
I (2-1), it is internal that the condensation chamber (1-7) is located at protection chamber (1-6), condensation chamber be length be 20 centimetres, internal diameter is 12 centimetres
Cylindrical shape, the condensation chamber (1-7) have the double-deck cavity wall, and the space between the double-deck cavity wall can be passed through liquid nitrogen and be used to cool down, cold
Solidifying chamber (1-7) is connected with spout (1-10), and the sample cavity (1-9) is located at condensation chamber (1-7) inside, and sample cavity (1-9) is long
Degree is 6 centimetres, the cylindrical shape that internal diameter is 3.5 centimetres, and sample cavity (1-9) has outer chamber wall and internal chamber wall, and the internal chamber wall has
Several mesh, the mesh diameter be 50 microns, between adjoining cells between be divided into 150 microns, enable to carrier gas stream more evenly
Ground enters sample cavity (1-9), and doped samples are placed in sample cavity (1-9), and sample cavity (1-9) has outlet, the sample feeding pipe
The one end (1-3) connects liquid storage tank (1-1) by flow controller (1-2), the other end sequentially passes through protection chamber (1-6) cavity wall, cold
Solidifying chamber (1-7) cavity wall and the outer chamber wall of sample cavity (1-9) are simultaneously connected between the outer chamber wall and internal chamber wall of sample cavity (1-9), are stored up
Gas tank (1-5) is connected to flow controller (1-2) by tracheae (1-4) and protects on the sample feeding pipe (1-3) between chamber (1-6),
Sample feeding pipe (1-3) and each junction of protection chamber (1-6) cavity wall, condensation chamber (1-7) cavity wall and sample cavity (1-9) outer chamber wall have
There is air-tightness, the periphery for being located at the part sample feeding pipe (1-3) in condensation chamber (1-7) has heater (1-8)；The liquid storage tank
It is stored in (1-1) to cluster sample, liquid storage tank (1-1) temperature can be adjusted in -50 to 250 degree Celsius ranges, the gas storage
Storing carrier gas in tank (1-5), carrier gas is the mixed gas of argon gas and helium, and the mass ratio of argon gas and helium is 8: 92, so that
There can be preferable cooling effect in the reaction that cluster is formed, air accumulator (1-5) can control the flow velocity of carrier gas, the load
Gas in sample feeding pipe (1-3) after the steam of cluster sample mixes, together enter sample cavity (1-9) outer chamber wall and internal chamber wall
Between, sample cavity (1-9) can be entered by the mesh on sample cavity (1-9) internal chamber wall；The protection chamber (1-6), condensation chamber
(1-7) and sample cavity (1-9) all have vacuum window, and the laser of laser II (1-11) transmitting can pass through each vacuum window
Mouth enters sample cavity (1-9) to carry out melting steaming to doped samples, and the steam of doped samples is with the steam to cluster sample in sample
After being sufficiently mixed in chamber (1-9), the outlet sample cavity (1-9) is passed sequentially through under the action of carrier gas and spout (1-10) enters vacuum
The vacuum zone I (2-1) of chamber (2).
Generate the principle of the macromolecular cluster of doping:
Cluster source usually has the lower sample cavity of temperature, and the higher steam to cluster sample of temperature is by carrier gas
Body generate colder environment in agglomerate, in sample cavity with doped samples steam, to cluster sample steam and
The steam generation of doped samples is at nuclear reaction and forms cluster, and subsequent cluster leaves cluster source with carrier gas stream, forms continuous point
Sub- cluster stream.Liquid storage tank (1-1) temperature is adjusted, the vapour pressure to cluster sample solution in liquid storage tank (1-1) can be changed, is flowed
Amount controller (1-2) can adjust the flow velocity for entering sample feeding pipe (1-3) to the steam of cluster sample, and air accumulator (1-5) can be adjusted
Section into sample feeding pipe (1-3) carrier gas flow velocity, the carrier gas mixes with described in sample feeding pipe (1-3) to cluster sample vapors
Enter between the outer chamber wall and internal chamber wall of sample cavity (1-9) afterwards, and sample is entered by the mesh on sample cavity (1-9) internal chamber wall
Chamber (1-9), laser II (1-11) emission pulse laser carry out melting steaming to generate doping to the doped samples in sample cavity (1-9)
The steam of sample, adjust pulse laser power can change doped samples steam vapour pressure；Adjust sample cavity (1-9) temperature
Degree, can control the reaction rate of the steam of the steam and doped samples to cluster sample, it is generally the case that molten to cluster sample
The vapour pressure of liquid is bigger, and the macromolecular cluster size of generation is bigger, and the flow velocity of carrier gas is smaller, and the macromolecular cluster size of generation is got over
Greatly, sample cavity (1-9) temperature and the temperature of the steam to cluster sample are closer, and the metering that molecule is adulterated in cluster is bigger, arteries and veins
The power of impulse light is bigger, and the metering that molecule is adulterated in cluster is bigger, in conclusion by adjusting the steaming to cluster sample solution
Vapour pressure, to the flow velocity of cluster sample vapors, the flow velocity of carrier gas, doped samples steam vapour pressure and sample cavity (1-9) temperature
Degree can control the size of the macromolecular cluster of generation and wherein adulterate the metering of molecule.
The principle that cluster is assembled:
Voltage reference tube (11) is the cylindrical shape that length is 20 millimeters, internal diameter is 12 millimeters, is made of copper, have entrance and
Outlet, the inlet diameter is 1.5 millimeters, outlet diameter is 1.0 millimeters, and velocity imaging electrode group (12) is one group along z pros
To the concentric metal ring electrode of arrangement, reflecting electrode, electrostatic attraction electrode, guard electrode and shielding electricity are followed successively by along z positive direction
Pole is applied to reflecting electrode, electrostatic attraction electrode and protection electricity by adjusting when cluster ions pass through velocity imaging electrode group (12)
Potential on extremely achievees the purpose that control the cluster direction of motion；The effect of voltage reference tube (11) be to will by speed at
The cluster of the repellel of picture electrode group (12) is pre-processed, to prevent cluster from defocusing, when ion enters voltage reference tube (11)
At the time of, the potential of voltage reference tube (11) is zero, when ion be entirely located in voltage reference tube (11) it is interior when, voltage reference tube
(11) potential be switched to it is consistent with the potential of reflecting electrode of velocity imaging electrode group (12), the beneficial effect is that can be more preferable
Ground focuses cluster ions.
A kind of particle imaging device mainly includes cluster source (1), vacuum chamber (2), current divider (3), ion lens I
(4), gate valve I (5), ion lens II (6), gate valve II (7), mass filter (8), micro-channel disc I (9), shielding case (10), base
Quasi- voltage pipe (11), velocity imaging electrode group (12), micro-channel disc II (13), detector (14), laser I (15) and vacuum pump
Group, xyz are three-dimensional coordinate system, and the vacuum chamber (2) has starting point and end, connection on the outside of vacuum chamber (2) starting point
Cluster source (1), detector (14) are located on the outside of vacuum chamber (2) end, can detect micro-channel disc I (9) and micro-channel disc II
(13) optical signal generated on, be divided into from vacuum chamber (2) starting point to end vacuum zone I (2-1), vacuum zone II (2-2),
Vacuum zone III (2-3) and vacuum zone IV (2-4), vacuum zone I (2-1) and vacuum zone II (2-2) are connected by current divider (3), very
Dead band II (2-2) and vacuum zone III (2-3) is connected by gate valve I (5), and vacuum zone III (2-3) and vacuum zone IV (2-4) pass through
Gate valve II (7) connection, the vacuum zone I (2-1), vacuum zone II (2-2), vacuum zone III (2-3) and vacuum zone IV (2-4) are equal
It is connected with vacuum pump group, ion lens I (4) is located in vacuum zone II (2-2), and ion lens II (6) is located at vacuum zone III (2-
3) in, mass filter (8), micro-channel disc I (9) and shielding case (10) are sequentially located in vacuum zone IV (2-4), voltage reference tube
(11), velocity imaging electrode group (12) and micro-channel disc II (13) are sequentially located in shielding case (10), the current divider (3), from
Sub-lens I (4), gate valve I (5), ion lens II (6), gate valve II (7), mass filter (8), micro-channel disc I (9), benchmark electricity
Pressure pipe (11), velocity imaging electrode group (12) and micro-channel disc II (13) constitute ion beam current path, micro-channel disc I (9) and
Micro-channel disc II (13) can remove or move into the ion beam current path, and laser I (15) is located at velocity imaging electrode group
(12) outside of the vacuum chamber (2) of position, vacuum chamber (2) and shielding case (10) all have optical transmission window, laser I (15)
The laser of transmitting can pass through the optical transmission window admission velocity imaging electrode group (12)；Cluster source (1) mainly includes liquid storage tank
(1-1), flow controller (1-2), sample feeding pipe (1-3), tracheae (1-4), air accumulator (1-5), protection chamber (1-6), condensation chamber (1-
7), heater (1-8), sample cavity (1-9), spout (1-10) and laser II (1-11), the protection chamber (1-6) are connected to very
The vacuum zone I (2-1) of cavity (2) starting point, the condensation chamber (1-7) are located at protection chamber (1-6) inside, and condensation chamber is that length is
20 centimetres, the cylindrical shape that internal diameter is 12 centimetres, the condensation chamber (1-7) have the double-deck cavity wall, the space energy between the double-deck cavity wall
Liquid nitrogen is enough passed through for cooling down, condensation chamber (1-7) is connected with spout (1-10), and the sample cavity (1-9) is located at condensation chamber (1-7)
Inside, sample cavity (1-9) are the cylindrical shapes that length is 6 centimetres, internal diameter is 3.5 centimetres, and sample cavity (1-9) has outer chamber wall and interior
Cavity wall, the internal chamber wall have several mesh, the mesh diameter be 50 microns, between adjoining cells between be divided into 150 microns, energy
Enough so that carrier gas stream more uniformly enters sample cavity (1-9), doped samples, sample cavity (1-9) tool are placed in sample cavity (1-9)
There is outlet, described sample feeding pipe one end (1-3) sequentially passes through guarantor by flow controller (1-2) connection liquid storage tank (1-1), the other end
Shield chamber (1-6) cavity wall, the outer chamber wall of condensation chamber (1-7) cavity wall and sample cavity (1-9) and the outer chamber wall for being connected to sample cavity (1-9)
Between internal chamber wall, air accumulator (1-5) is connected between flow controller (1-2) and protection chamber (1-6) by tracheae (1-4)
On sample feeding pipe (1-3), sample feeding pipe (1-3) and protection chamber (1-6) cavity wall, condensation chamber (1-7) cavity wall and sample cavity (1-9) outer chamber wall
Each junction all have air-tightness, be located at condensation chamber (1-7) in part sample feeding pipe (1-3) periphery have heater (1-
8)；It is stored in the liquid storage tank (1-1) to cluster sample, liquid storage tank (1-1) temperature can be in -50 to 250 degree Celsius ranges
It adjusts, carrier gas is stored in the air accumulator (1-5), carrier gas is the mixed gas of argon gas and helium, the quality of argon gas and helium
Than being 8: 92, make it possible to that there is preferable cooling effect in the reaction that cluster is formed, air accumulator (1-5) can control carrier gas
Flow velocity, the carrier gas in sample feeding pipe (1-3) after the steam of cluster sample mixes, together into sample cavity (1-9)
Between outer chamber wall and internal chamber wall, sample cavity (1-9) can be entered by the mesh on sample cavity (1-9) internal chamber wall；The protection
Chamber (1-6), condensation chamber (1-7) and sample cavity (1-9) all have vacuum window, and the laser of laser II (1-11) transmitting can lead to
Cross each vacuum window and enter sample cavity (1-9) melt steaming to doped samples, the steam of doped samples with to clustered
After the steam of product is sufficiently mixed in sample cavity (1-9), the outlet sample cavity (1-9) and spout are passed sequentially through under the action of carrier gas
(1-10) enters the vacuum zone I (2-1) of vacuum chamber (2)；At the time of the macromolecular cluster of doping enters voltage reference tube (11),
The potential of voltage reference tube (11) is zero, when the macromolecular cluster of doping be entirely located in voltage reference tube (11) it is interior when, benchmark electricity
The potential of pressure pipe (11) is switched to consistent with the potential of reflecting electrode of velocity imaging electrode group (12)；Voltage reference tube (11) is
The cylindrical shape that length is 20 millimeters, internal diameter is 12 millimeters, is made of copper, and voltage reference tube (11) has entrance and exit, benchmark
The inlet diameter of voltage pipe (11) is 1.5 millimeters, outlet diameter is 1.0 millimeters, and the potential on voltage reference tube (11) being capable of root
Switch according to ion relative to the position of voltage reference tube (11).
The utility model generates the macromolecular cluster of doping using special method, and the metering adulterated in cluster accurately may be used
Control, and the cluster of generation can be rapidly cooled, cluster is carried out effectively in addition, powering on the method that crush-cutting changes using electrode
Aggregation, improves the light reaction efficiency of cluster.
Claims (1)
1. a kind of particle imaging device mainly includes cluster source (1), vacuum chamber (2), current divider (3), ion lens I (4), door
Valve I (5), ion lens II (6), gate valve II (7), mass filter (8), micro-channel disc I (9), shielding case (10), reference voltage
Manage (11), velocity imaging electrode group (12), micro-channel disc II (13), detector (14), laser I (15) and vacuum pump group, xyz
For three-dimensional coordinate system, the vacuum chamber (2) has starting point and end, connects cluster source on the outside of vacuum chamber (2) starting point
(1), detector (14) is located on the outside of vacuum chamber (2) end, can detect and produce on micro-channel disc I (9) and micro-channel disc II (13)
Raw optical signal is divided into vacuum zone I (2-1), vacuum zone II (2-2), vacuum zone from vacuum chamber (2) starting point to end
III (2-3) and vacuum zone IV (2-4), vacuum zone I (2-1) and vacuum zone II (2-2) are connected by current divider (3), vacuum zone II
(2-2) and vacuum zone III (2-3) are connected by gate valve I (5), and vacuum zone III (2-3) and vacuum zone IV (2-4) pass through gate valve II
(7) it connects, the vacuum zone I (2-1), vacuum zone II (2-2), vacuum zone III (2-3) and vacuum zone IV (2-4) are respectively connected with
Vacuum pump group, ion lens I (4) are located in vacuum zone II (2-2), and ion lens II (6) is located in vacuum zone III (2-3), matter
Amount filter (8), micro-channel disc I (9) and shielding case (10) are sequentially located in vacuum zone IV (2-4), voltage reference tube (11), speed
Degree imaging electrode group (12) and micro-channel disc II (13) are sequentially located in shielding case (10), the current divider (3), ion lens I
(4), gate valve I (5), ion lens II (6), gate valve II (7), mass filter (8), micro-channel disc I (9), voltage reference tube
(11), velocity imaging electrode group (12) and micro-channel disc II (13) constitute ion beam current path, micro-channel disc I (9) He Weitong
Road disk II (13) can remove or move into the ion beam current path, and laser I (15) is located at velocity imaging electrode group (12)
The outside of the vacuum chamber (2) of position, vacuum chamber (2) and shielding case (10) all have optical transmission window, laser I (15) transmitting
Laser can by the optical transmission window admission velocity imaging electrode group (12),
It is characterized in that: cluster source (1) mainly includes liquid storage tank (1-1), flow controller (1-2), sample feeding pipe (1-3), tracheae (1-
4), air accumulator (1-5), protection chamber (1-6), condensation chamber (1-7), heater (1-8), sample cavity (1-9), spout (1-10) and sharp
Light device II (1-11), protection chamber (1-6) are connected to the vacuum zone I (2-1), the condensation chamber (1- of vacuum chamber (2) starting point
7) it is located at protection chamber (1-6) inside, condensation chamber is the cylindrical shape that length is 20 centimetres, internal diameter is 12 centimetres, the condensation chamber (1-
7) there is the double-deck cavity wall, the space between the double-deck cavity wall can be passed through liquid nitrogen for cooling down, and condensation chamber (1-7) is connected with spout
(1-10), it is internal that the sample cavity (1-9) is located at condensation chamber (1-7), sample cavity (1-9) be length be 6 centimetres, internal diameter 3.5
Centimetre cylindrical shape, sample cavity (1-9) has outer chamber wall and internal chamber wall, and the internal chamber wall has several mesh, and the mesh is straight
Diameter be 50 microns, between adjoining cells between be divided into 150 microns, enable to carrier gas stream more uniformly to enter sample cavity (1-9), sample
Doped samples are placed in product chamber (1-9), sample cavity (1-9) has outlet, and described sample feeding pipe (1-3) one end passes through flow control
Device (1-2) connection liquid storage tank (1-1), the other end sequentially pass through protection chamber (1-6) cavity wall, condensation chamber (1-7) cavity wall and sample cavity
The outer chamber wall of (1-9) is simultaneously connected between the outer chamber wall and internal chamber wall of sample cavity (1-9), and air accumulator (1-5) passes through tracheae (1-4)
It is connected to flow controller (1-2) and protects on the sample feeding pipe (1-3) between chamber (1-6), sample feeding pipe (1-3) and protection chamber (1-
6) each junction of cavity wall, condensation chamber (1-7) cavity wall and sample cavity (1-9) outer chamber wall all has air-tightness, is located at condensation chamber (1-
7) periphery of the part sample feeding pipe (1-3) in has heater (1-8)；It stores in the liquid storage tank (1-1) to cluster sample,
Liquid storage tank (1-1) temperature can be adjusted in -50 to 250 degree Celsius ranges, store carrier gas, carrier gas in the air accumulator (1-5)
For the mixed gas of argon gas and helium, the mass ratio of argon gas and helium is 8: 92, makes it possible to have in the reaction that cluster is formed
Have a preferable cooling effect, air accumulator (1-5) can control the flow velocity of carrier gas, in the carrier gas and sample feeding pipe (1-3) at
After the steam mixing of cluster sample, together between the outer chamber wall and internal chamber wall of sample cavity (1-9), sample cavity (1- can be passed through
9) mesh on internal chamber wall enters sample cavity (1-9)；The protection chamber (1-6), condensation chamber (1-7) and sample cavity (1-9) have
There is vacuum window, the laser of laser II (1-11) transmitting can enter sample cavity (1-9) by each vacuum window with right
Doped samples melt steaming, the steam of doped samples with after the steam of cluster sample is sufficiently mixed in sample cavity (1-9),
The outlet sample cavity (1-9) is passed sequentially through under the action of carrier gas and spout (1-10) enters the vacuum zone I (2-1) of vacuum chamber (2)；Base
Quasi- voltage pipe (11) is the cylindrical shape that length is 20 millimeters, internal diameter is 12 millimeters, is made of copper, voltage reference tube (11) have into
Mouth and outlet, the inlet diameter of voltage reference tube (11) is 1.5 millimeters, outlet diameter is 1.0 millimeters, on voltage reference tube (11)
Potential can be switched according to ion relative to the position of voltage reference tube (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821426509.2U CN208937465U (en) | 2018-08-23 | 2018-08-23 | A kind of particle imaging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821426509.2U CN208937465U (en) | 2018-08-23 | 2018-08-23 | A kind of particle imaging device |
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| Publication Number | Publication Date |
|---|---|
| CN208937465U true CN208937465U (en) | 2019-06-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142165A (en) * | 2018-08-23 | 2019-01-04 | 金华职业技术学院 | A kind of particle imaging device |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142165A (en) * | 2018-08-23 | 2019-01-04 | 金华职业技术学院 | A kind of particle imaging device |
| CN109142165B (en) * | 2018-08-23 | 2024-02-02 | 金华职业技术学院 | Particle imaging device |
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