CN2773749Y - Travelling gated framing camera of x-ray micro-channel panel - Google Patents
Travelling gated framing camera of x-ray micro-channel panel Download PDFInfo
- Publication number
- CN2773749Y CN2773749Y CN200520106844.0U CN200520106844U CN2773749Y CN 2773749 Y CN2773749 Y CN 2773749Y CN 200520106844 U CN200520106844 U CN 200520106844U CN 2773749 Y CN2773749 Y CN 2773749Y
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- microchannel plate
- microstrip line
- ray
- negative electrode
- image converter
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Abstract
The utility model relates to a traveling wave gated framing camera of an x-ray micro-channel panel. An image converter tube is composed of the micro-channel panel and a fluorescent screen pasted on the micro-channel panel, and a cathode microstrip line is made on an input surface of the micro-channel panel. A high-voltage pulse generator is connected with the cathode microstrip line through a coaxial cable line, and the cathode microstrip line is in the shape of a straight ribbon. The image converter tube is in a single near sticking reflection cathode structure. The utility model solves the technical problems that the gating pulse is used inconveniently, the transmission loss on the microstrip line is large and the number of the obtained image frames that are small. The utility model has the advantages of simple structure, low cost, high time resolution, high spatial resolution, high output stability and high synchronism; the utility model can take one to a plurality of x-ray images in a short time and can satisfy the requirements of ultra-fast procedures in various physical experiments, biological experiments, etc.
Description
Technical field
The utility model belongs to vacuum photoelectronic imaging device, is specifically related to a kind of X ray MCP travelling wave gating framing camera.
Background technology
The X ray framing camera is the important tool of laser fusion and laser plasma physical study.Measure that laser fusion experimentation ionic medium body temperature degree and density two-dimensional space distribute and over time, can be for research plasma instability and implosion symmetry etc., but the whole process of laser fusion experiment occurred over just in several nanoseconds, and the picosecond frame camera work is arisen at the historic moment.
At present, the framing imaging scheme is broadly divided into two classes: proximity focus travelling wave gating formula and deflecting shutter formula.Because deflecting shutter formula sweep type framing camera technical indicator is near the limit, its spatial resolution is 3-5lp/mm, and dynamic range 20～30 has gone to microstrip line travelling wave gating technology so study the focus of framing camera in recent years in the world.
In the existing travelling wave gating technology, microstrip line has and adopts crooked shaped microstrip negative electrode, and the negative electrode of this shape only needs the input of one road electric pulse, and its major defect is as follows:
1) because transmission path is long, and amplitude loss was big when electric pulse transmitted on little being with, the brightness of image gain of acquisition is different, and the result of gained is difficult to carry out quantitative test;
2) its employed psec high-voltage pulse is mainly produced by GaAs photoconductive switch, so strobe pulse produces inconvenience, and pulse height is subject to laser pulse with shape and influences;
3) during the carry high frequency electric pulse, the pin configuration of traditional image converter tube can cause very big loss to strobe pulse, and causes wave form distortion, reflection etc., makes the mixed and disorderly or effective voltage of the waveform that is added on the microchannel plate reduce the test result that is difficult to obtain;
4) little band cathode length is limited, and effectively the Measuring Time scope had only about 1 nanosecond, is difficult to satisfy the needs of ultrafast process diagnosis in the tests such as present various physics, biology.
The utility model content
The purpose of this utility model is to provide a kind of X ray microchannel plate travelling wave gating framing camera, and it has solved, and strobe pulse uses inconvenience in the background technology; Loss is big on microstrip line; Obtain the few technical matters of image picture number.
Technical solution of the present utility model is:
A kind of X ray microchannel plate travelling wave gating framing camera comprises image converter tube and high-voltage pulse generator 12; Described image converter tube by microchannel plate 3 and the video screen of putting 8 that closely is sticked form, be manufactured with negative electrode microstrip line 4 on the input face of described microchannel plate 3; Described high-voltage pulse generator 12 is connected with negative electrode microstrip line 4 by coaxial wire 11; It is characterized in that: described negative electrode microstrip line 4 is the banded microstrip line of vertical bar, and described image converter tube is single nearly reflective cathode construction that pastes.
Above-mentioned coaxial wire 11 with the preferred version that negative electrode microstrip line 4 is connected is: coaxial wire 11 links to each other with transition line 2 on the transmission line plate 1 by binding post 5, and described transition line 2 links to each other with negative electrode microstrip line 4; Described microchannel plate 3 and transmission line plate 1 are fixed on the ring flange 6 by microchannel plate pressure ring 7, and described video screen 8 welded seals are on ring flange 6.
Above-mentioned microchannel plate 3 closely is sticked with video screen 8 and puts, and closely pasting spacing is good with 0.3～1.0mm.
The front end of above-mentioned image converter tube can be provided with pin-hole imaging device 13, and the porch of this pin-hole imaging device 13 is provided with pinhole plate 10 and constitutes, and described pinhole plate 10 is provided with aperture.Be good so that the micron order aperture to be set on the described pinhole plate 10.Pin-hole imaging device can be avoided entering of parasitic light.
Above-mentioned image converter tube can be connected by radome 14 with pin-hole imaging device 13.
The utlity model has following advantage:
1. simple in structure, cost is low;
2. temporal resolution and spatial resolution height, the time shutter of every width of cloth can reach 60ps, and resolution reaches 15lp/mm;
3. can take a width of cloth at short notice to several radioscopic images;
4. adopt avalanche diode to produce the psec high-voltage pulse, use simply, output is stable, can tell identical a few road branch electric pulse from same road, and the good stability of these branch's electric pulses rocks for a short time, and synchronism is good;
5. can satisfy the needs of ultrafast process in the tests such as various physics, biology.
Description of drawings
Fig. 1 is the structural representation of the utility model transmission line plate;
Fig. 2 is the cross-sectional view of the utility model image converter tube;
Fig. 3 is the one-piece construction synoptic diagram of the utility model framing camera.
Drawing reference numeral explanation: 1-wiring board, 2-transition line, 3-microchannel plate, 4-negative electrode microstrip line, 5-pulse lead-in clamp, 6-ring flange, 7-microchannel plate pressure ring, the 8-video screen, 9-can cut down ring, the 10-pinhole plate, the 11-coaxial wire, the 12-high-voltage pulse generator, 13-pin-hole imaging device, 14-radome.
Embodiment
The utility model mainly is made of image converter tube and high-voltage pulse generator 12.
Referring to Fig. 1, the utility model negative electrode microstrip line 4 has two kinds of effects of negative electrode and microstrip transmission line concurrently, should guarantee the sensitivity to X-ray, takes into account the transmittability to strobe pulse again.The making of negative electrode microstrip line 4 is that the method by vacuum coating is produced on the metal material to the X-ray sensitivity on the microchannel plate 3, and for example the Au negative electrode has higher quantum efficiency to the X ray of 0.1～10keV scope, can convert X ray to photoelectron.The resistance of the controllable thickness system negative electrode microstrip line 4 by the control cathode microstrip line.Utilize mask plate that negative electrode microstrip line 4 is made into the vertical bar band shape during plated film, reducing the path of electric pulse transmission, thus the loss when reducing electric pulse and on negative electrode microstrip line 4, transmitting.One end of the transition line 2 on the transmission line plate 1 is connected with pulse lead-in clamp 5, and the other end of transition line 2 is connected with negative electrode microstrip line 4 on the microchannel plate 3.
Referring to Fig. 2, image converter tube adopts single nearly reflective cathode construction that pastes, and is made up of the microchannel plate 3 that is manufactured with negative electrode microstrip line 4 and the video screen of putting 8 that closely is sticked.Microchannel plate 3 and transmission are fixed on the ring flange 6 by microchannel plate pressure ring 7 with wiring board 1, by welding cutting down ring 9 and video screen 8 fixing seals on ring flange 6, the desirable 0.3～1.0mm of spacing of microchannel plate 3 and video screen 8.
Referring to Fig. 3, the electric pulse that is added on the microchannel plate 3 is imported into by coaxial wire 11.The frequency band of strobe pulse is very wide, for fear of the loss that wiring is introduced, specifically the electric pulse that high pressure picosecond pulse generator 12 produces can be sent into the negative electrode microstrip line 4 of image converter tube with 50 Ω coaxial wires 11.The resistance of negative electrode microstrip line 4 fades to about 17 Ω through transition line 2, to increase the effective imaging area on the microchannel plate 3.After strobe pulse sent into capable ripple image converter tube, the effective voltage on microchannel plate 3 was approximately 1KV, and can guarantee has higher gating gain.Microchannel plate 3 is as electron-multiplier, and the electronics that negative electrode microstrip line 4 is changed out doubles.By the electronics of microchannel plate 3 multiplications, outgoing is beaten on video screen 8, and electronics is converted to light photon once more, the output visible images.
The front end of image converter tube can be provided with pin-hole imaging device, according to optical principle design object distance and image distance.Pin-hole imaging device can adopt tubulose physical construction to fix, to avoid entering of parasitic light.After X-ray is by the aperture on the pinhole plate 10 of pin-hole imaging device, the picture that on the negative electrode microstrip line 4 of image converter tube, becomes to amplify.Image converter tube also can be connected with pin-hole imaging device 13 by radome 14.
The course of work: when the x-ray bombardment of importing was on pinhole plate 10, on negative electrode microstrip line 4, X-ray converted photoelectron to by photocathode to X ray by the pinhole imaging system on the pinhole plate 10.If do not add high pressure electric field on the negative electrode microstrip line 4, photoelectron will be absorbed by microchannel plate 3 and not have gain and export.When adding high pressure electric field, photoelectron collides the conduit wall of microchannel plate 3 under this electric field action, produces the secondary electron multiplication, passes microchannel plate 3 at last, beats on video screen 8, forms visible images output.
Change the area or the shape of microchannel plate 3 and last negative electrode microstrip line 4 thereof, simultaneously, change the input electric pulse, can obtain following several camera:
Embodiment one: adopt the microchannel plate 3 of diameter phi 56mm, be coated with four parallel negative electrode microstrip lines 4 thereon, the width of every negative electrode microstrip line 4 is 6mm, and negative electrode microstrip line 4 spacings are 4mm.Pinhole plate 10 is set, 16 pin holes are set on pinhole plate 10,4 of every row, 4 of every row.Import four road high electric field pulses successively, the last road of each road ratio of pulse length to the total cycle length postpones 200ps, can obtain 12 width of cloth images.Import successively and high electric field pulse time delay can on negative electrode microstrip line 4, transmit length and determine according to electric pulse.
Embodiment two: adopt the microchannel plate 3 of diameter phi 56mm, be coated with four negative electrode microstrip lines 4 with diameter symmetry thereon, the width of every negative electrode microstrip line 4 is 7mm or 8mm, and negative electrode microstrip line 4 spacings are 3mm or 2mm.Pinhole plate 10 is set, 3 pin holes of every row, 4 pin holes of every row.Import four road high electric field pulses successively, the last road of each road ratio of pulse length to the total cycle length postpones 200ps, can obtain the more large-area multiple image of 12 width of cloth.Import successively and high electric field pulse time delay can on negative electrode microstrip line 4, transmit length and determine according to electric pulse.
Embodiment three: adopt the microchannel plate 3 of diameter phi 56mm, be coated with the negative electrode microstrip line 4 of 40mm * 40mm thereon.Do not adopt pinhole arrangement, and allow the X ray direct irradiation on the negative electrode microstrip line 4 of microchannel plate 3, adopt the input of single channel electric pulse, can enlarge imaging area.
Embodiment four: adopt the microchannel plate 3 of diameter phi 56mm, be coated with the little band of single cathode of 15mm * 50mm thereon, without pin-hole imaging device, adopt the input of single channel electric pulse, can be used for taking spectrum.
According to request for utilization, the area of microchannel plate 3 can increase or reduce, and diameter can increase to φ 100mm, and can make width at most is that the little of 6mm is with 8, and adopts the more pinhole plate 10 of pin hole, to obtain more picture number.Also can not adopt pinhole plate 10, obtain bigger photographic images area.Less demanding to the picture number, but when the temporal resolution of camera and spatial resolution had relatively high expectations, can adopt the less microchannel plate of area 3, because the less and thinner thickness of microchannel plate 3 micro-pore diameters, can improve the performance index of camera greatly.By changing negative electrode microstrip line 4 materials, can enlarge the usable range of framing camera, spectral response range can be to infrared light from the ultraviolet light to the visible light, applicable to various wave bands.
Claims (6)
1. an X ray microchannel plate travelling wave gating framing camera comprises image converter tube and high-voltage pulse generator (12); Described image converter tube by microchannel plate (3) and the video screen of putting (8) that closely is sticked form, be manufactured with negative electrode microstrip line (4) on the input face of described microchannel plate (3); Described high-voltage pulse generator (12) is connected with negative electrode microstrip line (4) by coaxial wire (11); It is characterized in that: described negative electrode microstrip line (4) is the banded microstrip line of vertical bar, and described image converter tube is single nearly reflective cathode construction that pastes.
2. X ray microchannel plate travelling wave gating framing camera according to claim 1, it is characterized in that: described coaxial wire (11) and being connected of negative electrode microstrip line (4), to be coaxial wire (11) linked to each other with transition line (2) on the transmission line plate (1) by pulse lead-in clamp (5), and described transition line (2) links to each other with negative electrode microstrip line (4); Described microchannel plate (3) and transmission line plate (1) are fixed on the ring flange (6) by microchannel plate pressure ring (7), and described video screen (8) welded seal is on ring flange (6).
3. X ray microchannel plate travelling wave gating framing camera according to claim 1 and 2 is characterized in that: described microchannel plate (3) is put with closely being sticked of video screen (8).
4. X ray microchannel plate travelling wave gating framing camera according to claim 1 and 2, it is characterized in that: the front end of described image converter tube is provided with pin-hole imaging device (13), the porch of this pin-hole imaging device (13) pin-hole imaging device (13) is provided with pinhole plate (10), and described pinhole plate (10) is provided with aperture.
5. X ray microchannel plate travelling wave gating framing camera according to claim 3 is characterized in that: described image converter tube is connected by radome (14) with pin-hole imaging device (13).
6. X ray microchannel plate travelling wave gating framing camera according to claim 3 is characterized in that: described microchannel plate (3) is 0.3～1.0mm with the nearly subsides spacing of video screen (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200520106844.0U CN2773749Y (en) | 2005-07-26 | 2005-08-23 | Travelling gated framing camera of x-ray micro-channel panel |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510042993.X | 2005-07-26 | ||
| CN200510042993 | 2005-07-26 | ||
| CN200520106844.0U CN2773749Y (en) | 2005-07-26 | 2005-08-23 | Travelling gated framing camera of x-ray micro-channel panel |
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| Publication Number | Publication Date |
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| CN2773749Y true CN2773749Y (en) | 2006-04-19 |
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| CN200520106844.0U Expired - Fee Related CN2773749Y (en) | 2005-07-26 | 2005-08-23 | Travelling gated framing camera of x-ray micro-channel panel |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841498A (en) * | 2011-06-24 | 2012-12-26 | 中国科学院物理研究所 | Ultrafast framing imaging device |
| CN103126710A (en) * | 2012-12-27 | 2013-06-05 | 中国科学院西安光学精密机械研究所 | High time resolution three-dimensional imaging method based on framing camera |
| CN103560066A (en) * | 2013-11-11 | 2014-02-05 | 中国工程物理研究院激光聚变研究中心 | Micro-scanning space-time resolution measuring system |
| CN103631081A (en) * | 2013-12-11 | 2014-03-12 | 中国工程物理研究院激光聚变研究中心 | Projection-type soft-X-ray band pass imaging system |
| CN104270170A (en) * | 2014-09-16 | 2015-01-07 | 中国科学院西安光学精密机械研究所 | Electric pulse transmission system |
| CN104267421A (en) * | 2014-09-30 | 2015-01-07 | 中国科学院西安光学精密机械研究所 | Traveling-wave gated framing camera MCP microstrip line device and impedance matching method |
| CN104503200A (en) * | 2014-12-05 | 2015-04-08 | 中国科学院西安光学精密机械研究所 | Ultrahigh-speed framing camera system and ultrahigh-speed framing camera imaging method |
| CN104270170B (en) * | 2014-09-16 | 2017-01-04 | 中国科学院西安光学精密机械研究所 | Electric pulse transmission system |
| CN108054075A (en) * | 2017-12-14 | 2018-05-18 | 中国科学院西安光学精密机械研究所 | A kind of framing image-converter tube and framing camera |
-
2005
- 2005-08-23 CN CN200520106844.0U patent/CN2773749Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841498B (en) * | 2011-06-24 | 2015-05-27 | 中国科学院物理研究所 | Ultrafast framing imaging device |
| CN102841498A (en) * | 2011-06-24 | 2012-12-26 | 中国科学院物理研究所 | Ultrafast framing imaging device |
| CN103126710A (en) * | 2012-12-27 | 2013-06-05 | 中国科学院西安光学精密机械研究所 | High time resolution three-dimensional imaging method based on framing camera |
| CN103560066A (en) * | 2013-11-11 | 2014-02-05 | 中国工程物理研究院激光聚变研究中心 | Micro-scanning space-time resolution measuring system |
| CN103560066B (en) * | 2013-11-11 | 2016-04-13 | 中国工程物理研究院激光聚变研究中心 | Micro scanning time-space resolution measuring system |
| CN103631081A (en) * | 2013-12-11 | 2014-03-12 | 中国工程物理研究院激光聚变研究中心 | Projection-type soft-X-ray band pass imaging system |
| CN104270170B (en) * | 2014-09-16 | 2017-01-04 | 中国科学院西安光学精密机械研究所 | Electric pulse transmission system |
| CN104270170A (en) * | 2014-09-16 | 2015-01-07 | 中国科学院西安光学精密机械研究所 | Electric pulse transmission system |
| CN104267421A (en) * | 2014-09-30 | 2015-01-07 | 中国科学院西安光学精密机械研究所 | Traveling-wave gated framing camera MCP microstrip line device and impedance matching method |
| CN104503200A (en) * | 2014-12-05 | 2015-04-08 | 中国科学院西安光学精密机械研究所 | Ultrahigh-speed framing camera system and ultrahigh-speed framing camera imaging method |
| CN104503200B (en) * | 2014-12-05 | 2017-05-24 | 中国科学院西安光学精密机械研究所 | Ultrahigh-speed framing camera imaging method |
| CN108054075A (en) * | 2017-12-14 | 2018-05-18 | 中国科学院西安光学精密机械研究所 | A kind of framing image-converter tube and framing camera |
| CN108054075B (en) * | 2017-12-14 | 2024-05-14 | 中国科学院西安光学精密机械研究所 | Framing image converter tube and framing camera |
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| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |