CN108013891B - X-ray diagnostic device - Google Patents
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- CN108013891B CN108013891B CN201810075267.5A CN201810075267A CN108013891B CN 108013891 B CN108013891 B CN 108013891B CN 201810075267 A CN201810075267 A CN 201810075267A CN 108013891 B CN108013891 B CN 108013891B
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- 239000013307 optical fiber Substances 0.000 claims abstract description 20
- 238000003384 imaging method Methods 0.000 claims abstract description 17
- 238000001228 spectrum Methods 0.000 claims abstract description 13
- 239000013078 crystal Substances 0.000 claims abstract description 12
- 238000010894 electron beam technology Methods 0.000 claims description 24
- 238000003745 diagnosis Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 8
- 230000003595 spectral effect Effects 0.000 abstract description 4
- 238000001454 recorded image Methods 0.000 abstract 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 230000036962 time dependent Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
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Abstract
The invention discloses an X-ray diagnosis device. The device comprises a crystal, an imaging device and an X-ray fringe camera. The X-ray fringe camera comprises a scanning image converter tube, an optical fiber cone and an image recording device. X-rays emitted by a target are dispersed onto a photocathode slit I of a scanning image converter tube by a crystal, and are imaged onto a photocathode slit II by an imaging device, electrons are emitted by the action of the X-rays and the photocathode after passing through the slit, and the electrons pass through each electrode of the scanning image converter tube and bombard a fluorescent screen to emit visible light images after being subjected to focusing imaging and scanning deflection actions of the electrodes, and the visible light images are recorded by an image recording device after being transmitted by an optical fiber cone. The evolution process of the spatial and spectral information of the X-rays along with time can be obtained simultaneously through the recorded images. The X-ray diagnosis device has compact structure and large dynamic range, can simultaneously obtain time, space and spectrum information evolution process, and has wide application prospect.
Description
Technical Field
The invention belongs to the field of photoelectric detection, and particularly relates to an X-ray diagnosis device.
Background
In the research of laser fusion physics experiments, the precise diagnosis of the space and the time evolution process of the energy spectrum of the X-ray emitted by the plasma is an important research content. However, the conventional diagnostic devices, such as Guo Luting, wei Minxi, and the like, issued in the 28 th stage of 2016 on the field of intense laser and particle beam, high performance streaked X-ray spectrometer for research of laser-produced plasma, can only give a time evolution process of the X-ray space alone or give a time evolution process of the energy spectrum alone. In order to obtain the space of X-ray and the time evolution process of energy spectrum, the X-ray emitted by the ion body must be diagnosed from different directions by a plurality of sets of diagnosis devices, so that the space of the target room is occupied in a large way, and the time correlation among various diagnosis devices has a large error, thereby seriously affecting the precision of the physical experiment. There is a need for an X-ray diagnostic apparatus that can obtain both spatial and spectral information over time.
Disclosure of Invention
The invention aims to provide an X-ray diagnosis device.
The X-ray diagnosis apparatus of the present invention includes a crystal, an imaging device, and an X-ray fringe camera; the crystal and the imaging device are arranged in front of the X-ray stripe camera; the X-ray stripe camera comprises a scanning image converter tube, an optical fiber cone and an image recording device which are sequentially arranged along the z-axis direction;
the scanning image converter tube comprises a photocathode slit plate, a photocathode, a flat electrode I, a flat electrode II, a flat electrode III, an electric quadrupole lens focusing group, a flat electrode IV, a flat electrode V, a flat electrode VI, a deflection plate and a fluorescent screen which are sequentially arranged along the z-axis direction;
the photocathode slit plate is provided with a photocathode slit I and a photocathode slit II which are sequentially arranged along the x-axis direction;
the center of the flat electrode I is provided with a slit I along the x-axis direction;
the focusing group of the four-electrode lenses comprises four-electrode lenses I and four-electrode lenses II which are sequentially arranged along the x-axis direction;
the center of the flat electrode VI is provided with a slit II and a slit III which are sequentially arranged along the x-axis direction;
when the device works, after X-rays emitted by a target are diffracted by a crystal, spectrum signals contained in the X-rays are irradiated onto a photocathode slit plate along the X-axis direction, and the spectrum signals pass through a photocathode slit I and then interact with a photocathode to emit an electron beam I; x-rays emitted by the target are imaged on the photocathode slit plate through the imaging device, and the X-ray images also interact with the photocathode to emit electron beams II after passing through the photocathode slit II; the electron beam I enters the flat electrode I through the slit I, sequentially passes through the flat electrode II, the flat electrode III, the electric quadrupole lens I, the flat electrode IV, the flat electrode V, the flat electrode VI, the slit II and the deflection plate, then reaches the fluorescent screen and bombards the fluorescent screen to emit visible light images, and the visible light images enter the image recording device after being transmitted by the optical fiber cone; the electron beam II enters the flat electrode I through the slit I, sequentially passes through the flat electrode II, the flat electrode III, the electric quadrupole lens II, the flat electrode IV, the flat electrode V, the flat electrode VI, the slit III and the deflection plate, then reaches the fluorescent screen and bombards the fluorescent screen to emit visible light images, and the visible light images enter the image recording device after being transmitted by the optical fiber cone.
The imaging device is a pinhole.
The optical fiber cone is an image-shrinking optical fiber cone.
The image recording device is a CCD.
The photocathode slit I coincides with the central line of the electro-quadrupole lens I, and the photocathode slit II coincides with the central line of the electro-quadrupole lens II.
The slit II coincides with the central line of the photocathode slit I, and the slit III coincides with the central line of the photocathode slit II.
The X-ray diagnosis device has compact structure and large dynamic range, can simultaneously obtain time, space and spectrum information evolution process, and has wide application prospect.
Drawings
FIG. 1 is a schematic structural view of an X-ray diagnostic apparatus of the present invention;
FIG. 2 is a schematic view of the structure of a scan converter tube of the X-ray diagnostic apparatus of the present invention;
FIG. 3 is a schematic view of the structure of an electro-quadrupole lens focus set of a scanning image tube of an X-ray diagnostic apparatus of the present invention;
in the figure, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, and 27.
Detailed Description
The invention will now be described in detail with reference to the drawings and examples.
As shown in fig. 1 to 3, the X-ray diagnosis apparatus of the present invention includes a crystal 2, an imaging device 3, and an X-ray streak camera 4; the crystal 2 and the imaging device 3 are arranged in front of the X-ray stripe camera 4; the X-ray streak camera 4 includes a scanning image converter tube 5, an optical fiber taper 6, and an image recording device 7, which are sequentially arranged in the z-axis direction;
the scanning image converter tube 5 comprises a photocathode slit plate 8, a photocathode 9, a flat electrode I10, a flat electrode II 11, a flat electrode III 12, an electric quadrupole lens focusing group 13, a flat electrode IV 14, a flat electrode V15, a flat electrode VI 16, a deflection plate 17 and a fluorescent screen 18 which are sequentially arranged along the z-axis direction;
the photocathode slit plate 8 is provided with a photocathode slit I19 and a photocathode slit II 20 which are sequentially arranged along the x-axis direction;
the center of the flat electrode I10 is provided with a slit I21 along the x-axis direction;
the focusing group 13 of the four-electrode lenses comprises four-electrode lenses I24 and four-electrode lenses II 25 which are sequentially arranged along the x-axis direction;
the center of the flat electrode VI 16 is provided with a slit II 22 and a slit III 23 which are sequentially arranged along the x-axis direction;
when the device works, after X-rays emitted by a target 1 are diffracted by a crystal 2, spectrum signals contained in the X-rays are irradiated onto a photocathode slit plate 8 along the X-axis direction, and the spectrum signals interact with a photocathode 9 to emit an electron beam I26 after passing through a photocathode slit I19; x-rays emitted by the target 1 are also imaged on the photocathode slit plate 8 through the imaging device 3, and the X-ray images also interact with the photocathode 9 to emit an electron beam II 27 after passing through the photocathode slit II 20; the electron beam I26 enters the flat electrode I10 through the slit I21, sequentially passes through the flat electrode II 11, the flat electrode III 12, the electric quadrupole lens I24, the flat electrode IV 14, the flat electrode V15, the flat electrode VI 16, the slit II 22 and the deflection plate 17, then reaches the fluorescent screen 18 and bombards the fluorescent screen 18 to emit visible light images, and the visible light images enter the image recording device 7 after being transmitted by the optical fiber cone 6; the electron beam II 27 also enters the flat electrode I10 through the slit I21, sequentially passes through the flat electrode II 11, the flat electrode III 12, the electric quadrupole lens II 25, the flat electrode IV 14, the flat electrode V15, the flat electrode VI 16, the slit III 23 and the deflection plate 17, then reaches the fluorescent screen 18 and bombards the fluorescent screen 18 to emit a visible light image, and the visible light image is transmitted by the optical fiber cone 6 and then enters the image recording device 7.
The imaging device 3 is a pinhole.
The optical fiber cone 6 is an image-shrinking optical fiber cone.
The image recording device 7 is a CCD.
The photocathode slit I19 coincides with the central line of the quadrupole lens I24, and the photocathode slit II 20 coincides with the central line of the quadrupole lens II 25.
The slit II 22 coincides with the central line of the photocathode slit I19, and the slit III 23 coincides with the central line of the photocathode slit II 20.
Example 1
When the device works, the photocathode, the flat electrode I, the flat electrode II, the flat electrode III, the focusing group of the electric quadrupole lens, the flat electrode IV, the flat electrode V, the flat electrode VI and the deflection plate are applied with corresponding working voltages.
After the X-ray emitted from the target 1 is diffracted by the crystal 2, a spectrum signal contained in the X-ray is irradiated onto the photocathode slit plate 8 along the X-axis direction, and the spectrum signal passes through the photocathode slit i 19 and then interacts with the photocathode 9 to emit an electron beam i 26. Due to the negative high voltage acting on the photocathode 9, the electron beam I26 enters the flat electrode I10 through the slit I21 after being accelerated, sequentially passes through the flat electrode II 11, the flat electrode III 12, the quadrupole lens I24, the flat electrode IV 14, the flat electrode V15 and the flat electrode VI 16, then enters the deflection plate 17 through the slit I21, obtains time resolution after being subjected to the scanning deflection action of the deflection plate 17, and bombards the fluorescent screen 18 to emit visible light. The electron pre-focusing lens formed by the plate electrode I10, the plate electrode II 11 and the plate electrode III 12 focuses electrons in the y-axis direction, so that the electrons can keep small divergence in the y-axis direction in the motion process. The electron main focusing lens composed of the plate electrode IV 14, the plate electrode V15 and the plate electrode VI 16 further focuses electrons in the y-axis direction, so that the electron beam enters the deflection plate 17 with a small width, and high time resolution can be obtained. Since the electron quadrupole lens I24 has a focusing effect on electrons in the x-axis direction, the electron beam I26 can still maintain spectral information in the x-axis direction after reaching the phosphor screen 18.
The X-rays emitted from the target 1 are also simultaneously imaged by the imaging device 3 onto the photocathode slit plate 8, and the image after passing through the photocathode slit i 20 also interacts with the photocathode 9 and emits an electron beam ii 27. The electrons II 27 also pass through the electrodes to reach the phosphor screen 18 and are subjected to the same action as the electron beam I26. Except that the electron beam ii 27 passes through the quadrupole lens ii 25 and the slit ii 22 to reach the phosphor screen 18, and is focused by the quadrupole lens ii 25 in the X-axis direction. The electron beam ii 27 will contain the spatial information of the X-rays in the X-axis direction, and the time course of the spatial information can be obtained by the scanning deflection of the deflection plate 17. When the imaging device 3 is a pinhole, the fabrication of the device can be conveniently realized.
Finally, the visible light image emitted by the electron beam I26 and the electron beam II 27 bombarding the fluorescent screen 18 is recorded by the image recording device 7 after being transmitted by the optical fiber cone 6. The time-dependent course of the spatial morphology of the X-rays emitted by the target 1 in the X-axis direction and the time-dependent course of the spectral information contained in the X-rays can be obtained simultaneously from the images recorded by the image recording means 7. Since the visible light image emitted from the fluorescent screen 18 is large, the optical fiber taper 6 is an image-reduction optical fiber taper, and image reduction is performed when the image is transmitted, so that the image can be recorded by only a single image recording device 7. When a CCD is used as the image recording device 7, the image can be easily handled.
Meanwhile, it can be seen that the scan image converter tube 4 adopts the flat electrode group and the electric quadrupole lens to focus electrons respectively in the x-axis direction and the y-axis direction, and the space crossing points of the electrons in the two directions are inconsistent, so that the charge density can be reduced, the dynamic range can be improved, the electron beam I26 and the electron beam II 27 are mutually independent, no mutual influence exists, and the dynamic range of the device can be further improved.
The present invention is not limited to the above-described embodiments, and various modifications made by those skilled in the art from the above-described concepts without inventive effort are within the scope of the present invention.
Claims (5)
1. An X-ray diagnostic apparatus characterized in that: the device comprises a crystal (2), an imaging device (3) and an X-ray stripe camera (4); the crystal (2) and the imaging device (3) are arranged in front of the X-ray stripe camera (4); the X-ray streak camera (4) comprises a scanning image converter tube (5), an optical fiber cone (6) and an image recording device (7) which are sequentially arranged along the z-axis direction;
the scanning image converter tube (5) comprises a photocathode slit plate (8), a photocathode (9), a flat plate electrode I (10), a flat plate electrode II (11), a flat plate electrode III (12), an electric quadrupole lens focusing group (13), a flat plate electrode IV (14), a flat plate electrode V (15), a flat plate electrode VI (16), a deflection plate (17) and a fluorescent screen (18) which are sequentially arranged along the z-axis direction;
the photocathode slit plate (8) is provided with a photocathode slit I (19) and a photocathode slit II (20) which are sequentially arranged along the x-axis direction;
the center of the flat electrode I (10) is provided with a slit I (21) along the x-axis direction;
the focusing group (13) of the electric quadrupole lenses comprises electric quadrupole lenses I (24) and electric quadrupole lenses II (25) which are sequentially arranged along the x-axis direction;
the center of the flat electrode VI (16) is provided with a slit II (22) and a slit III (23) which are sequentially arranged along the x-axis direction;
when the device works, after X-rays emitted by a target (1) are diffracted by a crystal (2), spectrum signals contained in the X-rays are irradiated onto a photocathode slit plate (8) along the X-axis direction, and the spectrum signals interact with a photocathode (9) to emit an electron beam I (26) after passing through a photocathode slit I (19); x-rays emitted by the target (1) are imaged on the photocathode slit plate (8) through the imaging device (3) at the same time, and the X-ray images also interact with the photocathode (9) to emit an electron beam II (27) after passing through the photocathode slit II (20); the electron beam I (26) enters the flat electrode I (10) through the slit I (21), sequentially passes through the flat electrode II (11), the flat electrode III (12), the electric quadrupole lens I (24), the flat electrode IV (14), the flat electrode V (15), the flat electrode VI (16), the slit II (22) and the deflection plate (17), reaches the fluorescent screen (18) and bombards the fluorescent screen (18) to emit visible light images, and the visible light images enter the image recording device (7) after being transmitted by the optical fiber cone (6); the electron beam II (27) enters the flat electrode I (10) through the slit I (21) at the same time, sequentially passes through the flat electrode II (11), the flat electrode III (12), the electric quadrupole lens II (25), the flat electrode IV (14), the flat electrode V (15), the flat electrode VI (16), the slit III (23) and the deflection plate (17) and then reaches the fluorescent screen (18) and bombards the fluorescent screen (18) to emit visible light images, and the visible light images are transmitted by the optical fiber cone (6) and then enter the image recording device (7); the optical fiber cone (6) is an image-shrinking optical fiber cone.
2. The X-ray diagnostic apparatus as claimed in claim 1, characterized in that the imaging means (3) are pinholes.
3. The X-ray diagnostic apparatus as claimed in claim 1, characterized in that the image recording device (7) is a CCD.
4. An X-ray diagnostic apparatus according to claim 1, wherein the photocathode slit i (19) coincides with the center line of the quadrupole lens i (24), and the photocathode slit ii (20) coincides with the center line of the quadrupole lens ii (25).
5. The X-ray diagnostic apparatus according to claim 1, wherein the slit ii (22) coincides with the center line of the photocathode slit i (19), and the slit iii (23) coincides with the center line of the photocathode slit ii (20).
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| CN201810075267.5A CN108013891B (en) | 2018-01-26 | 2018-01-26 | X-ray diagnostic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109459779B (en) * | 2019-01-08 | 2023-08-18 | 中国工程物理研究院激光聚变研究中心 | Laser implosion diagnosis system |
| CN109975858B (en) * | 2019-05-06 | 2023-10-31 | 中国工程物理研究院激光聚变研究中心 | Imaging photoelectron beam scanning type time-domain gating photoelectric detection system |
| CN111426705A (en) * | 2020-03-30 | 2020-07-17 | 中国工程物理研究院激光聚变研究中心 | Synoptophore scanning framing diagnostic device |
| CN111323440A (en) * | 2020-04-09 | 2020-06-23 | 中国工程物理研究院激光聚变研究中心 | X-ray diffraction diagnostic system |
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