CN207052565U - It is a kind of to be used to study the device that ionic light excites rear product - Google Patents
It is a kind of to be used to study the device that ionic light excites rear product Download PDFInfo
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- CN207052565U CN207052565U CN201721007869.4U CN201721007869U CN207052565U CN 207052565 U CN207052565 U CN 207052565U CN 201721007869 U CN201721007869 U CN 201721007869U CN 207052565 U CN207052565 U CN 207052565U
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Abstract
It the utility model is related to photoelectron and molecular reaction dynamics field,It is a kind of to be used to study the device that ionic light excites rear product,Focusing electrode group is located on the inside of ion beam porch,Quality selection electrode group I is located at inner side at particle outlet I,Quality selection electrode group II is located at inner side at particle outlet II,It is 30 degree that quality, which selects angle between electrode group I and quality selection electrode group II axis,,The input face of photomultiplier tube array and output face connect the both positive and negative polarity of a pulse voltage source respectively,Electronics can produce signal by photomultiplier tube array and in the correspondence position of electron detector,Electrostatic deflection device is located between focusing electrode group and quality selection electrode group I,When electrostatic deflection device is grounded,Can pass through the particle of the axial-movement along the focusing electrode group and quality selection electrode group I,After electrostatic deflection device adds certain voltage,Charged particle can be made to produce certain angle deviation,Capacitive load is accessed between the input face and ground wire of photomultiplier tube array.
Description
Technical field
It the utility model is related to photoelectronic imaging technical field and molecular reaction dynamics field, particularly one kind can be simultaneously
Measurement charged debris and a kind of of neutral fragment are used to study the device that ionic light excites rear product.
Background technology
Ion beam storage device, electrostatic ionic beam are typically required in light activated particle rapidity imaging device for studying
Storage device is generally made up of two arrays of electrodes, and one of its advantage is the good directionality of ion and energy is high, for detecting by photon
Or electronic induction reaction or decay and caused fragment ion.But for linear pattern electrostatic ionic beam storage device, at certain
Above-mentioned advantage is restricted in the experiments of a little detection fragment ions, wherein neutral fragment can by ion beam storage device its
The electrode group of middle side leaves ion storage region, and is detected outside storage region, for powered fragment, will not leave
Ion beam storage device, but because it no longer meets the condition of stable capture therefore can disappear quickly.In order to detect with
Capture the fragment of the same electric charge of ion band.In addition, in some ionic systems, according to nonadiabatic coupling, excited by light and obtained
Electron energy with its vibrational degrees of freedom be distributed；When vibrational energy is re-converted into electron energy, electronics is launched from system
Out, this process is to have the delay of musec order relative to light activated process, and still, prior art defect is, big
In most existing Photoelectron Spectroscopy Experiments, the relevant experimental data of instant electron emission can only be obtained, can not but detect and prolong
When launching electronics and obtain its relevant information, it is described it is a kind of be used to studying ionic light excite the device of rear product to solve problem.
Utility model content
In order to solve the above problems, the utility model adds one on the basis of linear pattern electrostatic ionic beam storage device
Individual electrostatic deflection device makes stable ion trajectory deflection, measures charged debris and neutral fragment simultaneously to realize, in addition, this hair
It is bright to reach regular hour resolution ratio to applying pulse voltage between the input face of photomultiplier tube array and output face, with area
Light splitting excites rear electron emission immediately and the electron emission of delay.
Technical scheme is used by the utility model：
A kind of device that rear product is excited for studying ionic light mainly includes ion gun, accelerator, flight time
Mass spectrum, mass particle selector, low temperature cold screen, ion beam entrance, by focusing electrode I, focusing electrode II, focusing electrode III, poly-
Burnt electrode IV, focusing electrode V composition focusing electrode group, electrostatic deflection device, by electrode I, electrode II, electrode III, electrode IV,
The quality selection electrode group I of electrode V compositions, the quality being made up of electrode VI, electrode VII, electrode VIII, electrode IX, electrode X are selected
Select electrode group II, laser entrance, particle outlet I, ion detector I, magnetic shielding cover, electronic background and reduce plate, reflecting plate, ion
Revision board, extract electrode, beam forming electrode, photomultiplier tube array, electron detector, particle outlet II, ion detector II simultaneously
It is respectively positioned in ultra-high vacuum environment, the focusing electrode group, electrostatic deflection device, quality selection electrode group I, quality selection electrode group
II, magnetic shielding cover, electronic background reduce plate, reflecting plate, ion revision board, extraction electrode, beam forming electrode, photomultiplier battle array
Row, electron detector are respectively positioned in the low temperature cold screen, and the electronic background reduces plate, reflecting plate, ion revision board, extraction electricity
Pole, beam forming electrode, photomultiplier tube array, electron detector are respectively positioned in the magnetic shielding cover, and the low temperature cold screen has institute
Ion beam entrance, laser entrance, particle outlet I, particle outlet II are stated, the reflecting plate, ion revision board, electrode is extracted, is poly-
Beam electrode is annular, the electronic background reduce plate, reflecting plate, ion revision board be sequentially located in the laser entrance,
And between the focusing electrode group and electrostatic deflection device, laser can pass through the electronic background by the laser entrance
Reduce plate and the interaction zone of laser and ion, the zone of action are formed at the ion revision board overcentre
Surface is coaxial with the ion revision board center be sequentially installed with the extraction electrode, beam forming electrode, photomultiplier tube array,
Electron detector, ion beam entrance described in face is coaxial on the outside of the low temperature cold screen is sequentially installed with the mass particle selection
Device, flight time mass spectrum, accelerator, ion gun, the ion detector I are located at particle described in face on the outside of the low temperature cold screen
Export at I, the ion detector II is located at the particle outlet II on the outside of the low temperature cold screen, the focusing electrode
Group, quality selection electrode group I and quality selection electrode group II are annular electrode, the centre bore of electrode in the focusing electrode group
Diameter is incremented by from focusing electrode I to focusing electrode V, in the quality selection electrode group I center-hole diameter of electrode from electrode I to
Electrode V successively decreases, and the center-hole diameter of electrode is successively decreased from electrode VI to electrode X in the quality selection electrode group II.
The focusing electrode group is located on the inside of ion beam porch, and the quality selection electrode group I is located at particle outlet I
Inner side, the quality selection electrode group II are located at inner side at particle outlet II, the quality selection electrode group I and quality selection electricity
Angle is 30 degree between the group II axis of pole, and the photomultiplier tube array has input face and output face and respectively connection one
The both positive and negative polarity of pulse voltage source, towards beam forming electrode, the voltage difference of the input face and output face exceedes certain the input face
During value, electronics can produce signal by the photomultiplier tube array and in the correspondence position of the electron detector, described
Electrostatic deflection device is made up of two coaxial spheric electrodes and between the focusing electrode group and quality selects electrode group I,
There is ground shield its interior electrode radius 60mm, dispatch from foreign news agency polar radius 75mm, outside, have open-work on its external electrode, when electrostatic is inclined
When being grounded to device, the particle of axial-movement along the focusing electrode group and quality selection electrode group I can be made by working as electrostatic
After deflector adds certain voltage, charged particle can be made to produce the deviation of certain angle, ion revision board can compensate for due to anti-
The distortion of ion beam trajectory caused by penetrating plate and extracting the electric field of electrode, in the input face and ground wire of the photomultiplier tube array
Between access capacitive load, can photomultiplier tube array input face apply voltage pulse while, reduce voltage pulse
Influence to the voltage of focusing electrode, to avoid defocusing for trajectory of electron motion.
Using it is described it is a kind of be used to study the method and step that ionic light excites the device of rear product to be studied be：
One, ion guns produce ion, and applying accelerating potential on accelerator accelerates ion, and ion passes through flight time mass spectrum
After the quality selection of mass particle selector, an ion beam fragment is formed, enters low temperature cold screen from ion beam entrance；
The voltage of focusing electrode group is set to zero by two, quality is selected the voltage on electrode group I be set to zero, quality selection
Apply the voltage of single-slope on electrode group II, make electrode VI, electrode VII, electrode VIII, electrode IX, the voltage on electrode X according to
Same slope is incremented by and the voltage on electrode X is higher than the accelerating potential accelerated on electrode, applies voltage on electrostatic deflection device, makes
Obtaining ion beam fragment can deflect into quality selection electrode group II；
Three, apply impulse electric field in focusing electrode group, make focusing electrode after ion beam fragment is by focusing electrode group
V, focusing electrode IV, focusing electrode III, focusing electrode II, voltage is incremented by successively on focusing electrode I, ion motion to quality selects
Select in electrode group II, be used as retarded motion and counter motion by the work of backward voltage so that move to focusing electrode group；
Four, by quality select forerunner's ion of electrode group II reflection at the ion revision board near interaction zone quilt
Laser irradiates, and ion and laser interaction produce fragment ion and photoelectron；
Five, fragment ions fly to focusing electrode group and reflected, and apply voltage, finally, fragment ion on focusing electrode I
In with ion gun caused by parent ion carry same electric charge fragment ion, by electrostatic deflection device deviation after further through quality
Selection electrode group II flies to ion detector II, and the neutral fragment in fragment ion selects electrode group I to fly to ion by quality
Detector I；Meanwhile photoelectron reaches the input face of photomultiplier tube array after extracting electrode and beam forming electrode acceleration, gathers
It is 500V to apply voltage peak on beam electrode；
Six, apply 1 millisecond voltage 1000V, cycle of voltage between the input face of photomultiplier tube array and output face
Pulse, electrical potential difference is stable in 2000V between photomultiplier tube array output face and electron detector；
Temporal resolution of the seven, test devices to certain ion：The detection efficient of particle rapidity imaging is proportional to electron Spectrum
Integration, the electron Spectrum obtained by electron detector draws detection efficient, uses oscilloscope measurement laser pulse and high-tension pulse
Time difference t ' between the peak value of punching, and change t ' by interval of 10ns, the detection efficient under the conditions of different t ' is measured, obtains grain
The detection efficient curve of sub- velocity imaging, abscissa t ', and thus draw its peak width at half height t1, and peak value t0；
The time interval of laser pulse and high-voltage pulse is set to t by eight,0, what now electron detector detected swashs for light
Instant launching electronics after hair, and t1Postpone the electronics of transmitting after what electron detector detected after the time excite for light；
Nine, compare the information for the charged ion fragment that ion detector II at different moments is obtained, ion detector I is obtained
The photoelectronic information that the information and electron detector of neutral fragment obtain, grinding for rear product is excited for carrying out ionic light
Study carefully.
Technology explanation of the test device to the temporal resolution of certain ion：Due to particle rapidity imaging detection efficient just
Than in the integration of electron Spectrum, therefore the electron Spectrum obtained by electron detector draws detection efficient.Swashed using oscilloscope measurement
Time difference t ' between light pulse and the peak value of high-voltage pulse, and change t ' by interval of 10ns, and under the conditions of measuring different t '
Detection efficient, obtain the detection efficient curve of particle rapidity imaging, abscissa t ', and thus draw its peak width at half height t1,
And peak value t0。
The beneficial effects of the utility model are：
The utility model allows for measuring while charged debris and neutral fragment, and cost is low, small volume,
Simple to operate, ion beam current good directionality；By applying pulse electricity between the input face to photomultiplier tube array and output face
Press to reach high time resolution, the temporal resolution of velocity of electrons imaging is high, can tell instant electron emission and delay is electric
Son transmitting.
Brief description of the drawings
Further illustrated with reference to figure of the present utility model：
Fig. 1 is the utility model structure diagram.
In figure, 1. ion guns, 2. accelerators, 3. flight time mass spectrums, 4. mass particle selectors, 5. low temperature cold screens, 6.
Ion beam entrance, 7. focusing electrode groups, 7-1. focusing electrodes I, 7-2. focusing electrode II, 7-3. focusing electrode III, 7-4. focusing
Electrode IV, 7-5. focusing electrode V, 8. electrostatic deflection devices, 9. mass selection electrode group I, 9-1. electrode I, 9-2. electrode II, 9-3.
Electrode III, 9-4. electrode IV, 9-5. electrode V, 10. mass selection electrode group II, 10-1. electrode VI, 10-2. electrode VII, 10-
3. electrode VIII, 10-4. electrode IX, 10-5. electrode X, 11. laser entrances, 12. particle outlet I, 13. ion detector I, 14.
Magnetic shielding cover, 15. electronic backgrounds reduction plate, 16. reflecting plates, 17. ion revision boards, 18. extraction electrodes, 19. beam forming electrodes,
20. photomultiplier tube array, 21. electron detectors, 22. particle outlet II, 23. ion detector II.
Embodiment
If Fig. 1 is the utility model structure diagram, mainly including ion gun (1), accelerator (2), flight time mass spectrum
(3), mass particle selector (4), low temperature cold screen (5), ion beam entrance (6), by focusing electrode I (7-1), focusing electrode II
(7-2), focusing electrode III (7-3), focusing electrode IV (7-4), the focusing electrode group (7) of focusing electrode V (7-5) compositions, electrostatic
Deflector (8), it is made up of electrode I (9-1), electrode II (9-2), electrode III (9-3), electrode IV (9-4), electrode V (9-5)
Quality selection electrode group I (9), by electrode VI (10-1), electrode VII (10-2), electrode VIII (10-3), electrode IX (10-4),
Quality selection electrode group II (10), laser entrance (11), particle outlet I (12), the ion detector I of electrode X (10-5) compositions
(13), magnetic shielding cover (14), electronic background reduce plate (15), reflecting plate (16), ion revision board (17), extract electrode (18),
Beam forming electrode (19), photomultiplier tube array (20), electron detector (21), particle outlet II (22), ion detector II
(23) and it is respectively positioned in ultra-high vacuum environment, the focusing electrode group (7), electrostatic deflection device (8), quality selection electrode group I
(9), quality selection electrode group II (10), magnetic shielding cover (14), electronic background reduce plate (15), reflecting plate (16), ion amendment
Plate (17), extraction electrode (18), beam forming electrode (19), photomultiplier tube array (20), electron detector (21) are respectively positioned on described
In low temperature cold screen (5), the electronic background reduce plate (15), reflecting plate (16), ion revision board (17), extract electrode (18),
Beam forming electrode (19), photomultiplier tube array (20), electron detector (21) are respectively positioned in the magnetic shielding cover (14), described low
Wen Lengping (5) has the ion beam entrance (6), laser entrance (11), particle outlet I (12), particle outlet II (22), described
Reflecting plate (16), ion revision board (17), extraction electrode (18), beam forming electrode (19) are annular, and the electronic background is reduced
Plate (15), reflecting plate (16), ion revision board (17) are sequentially located in laser entrance (11) place and focus on electricity positioned at described
Between pole group (7) and electrostatic deflection device (8), laser can reduce plate by the laser entrance (11) through the electronic background
(15) interaction zone of laser and ion, the active region and at ion revision board (17) overcentre are formed
Directly over domain it is coaxial with ion revision board (17) center be sequentially installed with it is described extract electrode (18), beam forming electrode (19),
Photomultiplier tube array (20), electron detector (21), ion beam entrance (6) described in the face of low temperature cold screen (5) outside is altogether
Axle is sequentially installed with the mass particle selector (4), flight time mass spectrum (3), accelerator (2), ion gun (1), it is described from
Sub- detector I (13) is located on the outside of the low temperature cold screen (5) particle outlet I (12) place, the ion detector II described in face
(23) particle outlet II (22) place on the outside of the low temperature cold screen (5), the focusing electrode group (7), quality selection
Electrode group I (9) and quality selection electrode group II (10) is annular electrode, the centre bore of electrode in the focusing electrode group (7)
Diameter is incremented by from focusing electrode I (7-1) to focusing electrode V (7-5), the centre bore of electrode in the quality selection electrode group I (9)
Diameter is successively decreased from electrode I (9-1) to electrode V (9-5), in quality selection electrode group II (10) center-hole diameter of electrode by
Electrode VI (10-1) successively decreases to electrode X (10-5).
The focusing electrode group (7) is located on the inside of ion beam entrance (6) place, and the quality selection electrode group I (9) is located at grain
On the inside of subexit I (12) place, the quality selection electrode group II (10) is located on the inside of particle outlet II (22) place, the quality choosing
It is 30 degree to select angle between electrode group I (9) and quality selection electrode group II (10) axis, photomultiplier tube array (20) tool
Have input face and output face and connect the both positive and negative polarity of a pulse voltage source respectively, the input face towards beam forming electrode (19),
When the input face and the voltage difference of output face exceed certain value, electronics can by the photomultiplier tube array (20) and
The correspondence position of the electron detector (21) produces signal, and the electrostatic deflection device (8) is by two coaxial spheric electrode groups
Into and positioned between the focusing electrode group (7) and quality selection electrode group I (9), its interior electrode radius 60mm, external electrode are partly
There is ground shield footpath 75mm, outside, have open-work on its external electrode, when electrostatic deflection device (8) is grounded, can make along described
The particle of focusing electrode group (7) and quality selection electrode group I (9) axial-movement is by when electrostatic deflection device (8) plus certain electricity
After pressure, charged particle can be made to produce the deviation of certain angle, ion revision board (17) can compensate for due to reflecting plate (16) and
The distortion of ion beam trajectory caused by extracting the electric field of electrode (18), on input face and the ground of the photomultiplier tube array (20)
Capacitive load is accessed between line, electricity can be reduced while the input face of photomultiplier tube array (20) applies voltage pulse
Influence of the pulse to the voltage of focusing electrode (19) is pressed, to avoid defocusing for trajectory of electron motion.
Technology explanation of the test device to the temporal resolution of certain ion：Due to particle rapidity imaging detection efficient just
Than in the integration of electron Spectrum, therefore the electron Spectrum obtained by electron detector draws detection efficient.Swashed using oscilloscope measurement
Time difference t ' between light pulse and the peak value of high-voltage pulse, and change t ' by interval of 10ns, and under the conditions of measuring different t '
Detection efficient, obtain the detection efficient curve of particle rapidity imaging, abscissa t ', and thus draw its peak width at half height t1,
And peak value t0。
The utility model selects the structure of electrode group to ensure that surely by focusing electrode group, electrostatic deflection device, two groups of quality
Fixed ion trajectory deflection, and realize and measure charged debris and neutral fragment simultaneously.In addition, the utility model is to photomultiplier
Apply pulse voltage between the input face of array and output face to reach regular hour resolution ratio, to distinguish after light excites immediately
Electron emission and the electron emission of delay；Installation cost is low, small volume, simple to operate, ion beam current good directionality.
Claims (1)
1. a kind of be used to study the device that ionic light excites rear product, mainly including ion gun (1), accelerator (2), flight time
Mass spectrum (3), mass particle selector (4), low temperature cold screen (5), ion beam entrance (6), by focusing electrode I (7-1), focusing electrode
II (7-2), focusing electrode III (7-3), focusing electrode IV (7-4), the focusing electrode group (7), quiet of focusing electrode V (7-5) compositions
Electric deflector (8), it is made up of electrode I (9-1), electrode II (9-2), electrode III (9-3), electrode IV (9-4), electrode V (9-5)
Quality selection electrode group I (9), by electrode VI (10-1), electrode VII (10-2), electrode VIII (10-3), electrode IX (10-
4), the quality selection electrode group II (10) of electrode X (10-5) compositions, laser entrance (11), particle outlet I (12), ion detection
Device I (13), magnetic shielding cover (14), electronic background reduce plate (15), reflecting plate (16), ion revision board (17), extraction electrode
(18), beam forming electrode (19), photomultiplier tube array (20), electron detector (21), particle outlet II (22), ion detector
II (23) is simultaneously respectively positioned in ultra-high vacuum environment, the focusing electrode group (7), electrostatic deflection device (8), quality selection electrode group I
(9), quality selection electrode group II (10), magnetic shielding cover (14), electronic background reduce plate (15), reflecting plate (16), ion amendment
Plate (17), extraction electrode (18), beam forming electrode (19), photomultiplier tube array (20), electron detector (21) are respectively positioned on described
In low temperature cold screen (5), the electronic background reduce plate (15), reflecting plate (16), ion revision board (17), extract electrode (18),
Beam forming electrode (19), photomultiplier tube array (20), electron detector (21) are respectively positioned in the magnetic shielding cover (14), described low
Wen Lengping (5) has the ion beam entrance (6), laser entrance (11), particle outlet I (12), particle outlet II (22), described
Reflecting plate (16), ion revision board (17), extraction electrode (18), beam forming electrode (19) are annular, and the electronic background is reduced
Plate (15), reflecting plate (16), ion revision board (17) are sequentially located in laser entrance (11) place and focus on electricity positioned at described
Between pole group (7) and electrostatic deflection device (8), laser can reduce plate by the laser entrance (11) through the electronic background
(15) interaction zone of laser and ion, the active region and at ion revision board (17) overcentre are formed
Directly over domain it is coaxial with ion revision board (17) center be sequentially installed with it is described extract electrode (18), beam forming electrode (19),
Photomultiplier tube array (20), electron detector (21), ion beam entrance (6) described in the face of low temperature cold screen (5) outside is altogether
Axle is sequentially installed with the mass particle selector (4), flight time mass spectrum (3), accelerator (2), ion gun (1), it is described from
Sub- detector I (13) is located on the outside of the low temperature cold screen (5) particle outlet I (12) place, the ion detector II described in face
(23) particle outlet II (22) place on the outside of the low temperature cold screen (5), the focusing electrode group (7), quality selection
Electrode group I (9) and quality selection electrode group II (10) is annular electrode, the centre bore of electrode in the focusing electrode group (7)
Diameter is incremented by from focusing electrode I (7-1) to focusing electrode V (7-5), the centre bore of electrode in the quality selection electrode group I (9)
Diameter is successively decreased from electrode I (9-1) to electrode V (9-5), in quality selection electrode group II (10) center-hole diameter of electrode by
Electrode VI (10-1) successively decreases to electrode X (10-5),
It is characterized in that：The focusing electrode group (7) is located on the inside of ion beam entrance (6) place, the quality selection electrode group I (9)
On the inside of particle outlet I (12) place, the quality selection electrode group II (10) is located on the inside of particle outlet II (22) place, described
Angle is 30 degree between quality selection electrode group I (9) and quality selection electrode group II (10) axis, the photomultiplier tube array
(20) there is input face and output face and connect the both positive and negative polarity of a pulse voltage source respectively, the input face is electric towards pack
When the voltage difference of pole (19), the input face and output face exceedes certain value, electronics can pass through the photomultiplier tube array
(20) signal and in the correspondence position of the electron detector (21) is produced, the electrostatic deflection device (8) is by two coaxial balls
Shape electrode forms and between the focusing electrode group (7) and quality selection electrode group I (9), its interior electrode radius 60mm,
There is ground shield dispatch from foreign news agency polar radius 75mm, outside, have open-work on its external electrode, can when electrostatic deflection device (8) is grounded
Make the particle of the axial-movement along the focusing electrode group (7) and quality selection electrode group I (9) by when electrostatic deflection device (8)
After adding certain voltage, charged particle can be made to produce the deviation of certain angle, ion revision board (17) can compensate for due to reflection
The distortion of ion beam trajectory caused by the electric field of plate (16) and extraction electrode (18), in the defeated of the photomultiplier tube array (20)
Enter and capacitive load is accessed between face and ground wire, the same of voltage pulse can be applied in the input face of photomultiplier tube array (20)
When, influence of the voltage pulse to the voltage of focusing electrode (19) is reduced, to avoid defocusing for trajectory of electron motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721007869.4U CN207052565U (en) | 2017-08-02 | 2017-08-02 | It is a kind of to be used to study the device that ionic light excites rear product |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721007869.4U CN207052565U (en) | 2017-08-02 | 2017-08-02 | It is a kind of to be used to study the device that ionic light excites rear product |
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| Publication Number | Publication Date |
|---|---|
| CN207052565U true CN207052565U (en) | 2018-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721007869.4U Withdrawn - After Issue CN207052565U (en) | 2017-08-02 | 2017-08-02 | It is a kind of to be used to study the device that ionic light excites rear product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107507752A (en) * | 2017-08-02 | 2017-12-22 | 金华职业技术学院 | It is a kind of to be used to study the device that ionic light excites rear product |
-
2017
- 2017-08-02 CN CN201721007869.4U patent/CN207052565U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107507752A (en) * | 2017-08-02 | 2017-12-22 | 金华职业技术学院 | It is a kind of to be used to study the device that ionic light excites rear product |
| CN107507752B (en) * | 2017-08-02 | 2019-01-11 | 金华职业技术学院 | It is a kind of for study ionic light excitation after product device |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180227 Effective date of abandoning: 20190111 |
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| AV01 | Patent right actively abandoned |