A high temporal and spatial resolution image acquisition system for fast ion loss probes

Abstract

The present invention discloses a high-temporal-spatial-resolution image acquisition system for a fast ion loss probe, comprising an imaging lens, a spectroscopic image transmission bundle, a relay lens, a photomultiplier tube array, and a high-speed camera. The imaging lens is mounted at the rear end of a linear introducer for the fast ion loss probe outside a magnetic confinement fusion device, and a spectroscopic image transmission bundle is mounted at the rear end of the imaging lens. The spectroscopic image transmission bundle in the present invention separates one of the two end faces of a traditional image transmission fiber bundle into two end faces. For every several pixels on the end face of the fiber bundle receiving image input, the fiber end corresponding to one pixel is separated to one of the fiber bundle output ends, and the fiber ends corresponding to the remaining pixels are separated to the other fiber bundle output end. The two output ends of the image transmission bundle are coupled to the photomultiplier tube array and the high-speed camera, respectively, thereby simultaneously acquiring high-temporal-resolution and high-spatial-resolution signals from the fast ion loss probe.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic confinement fusion plasma diagnosis, and in particular to a high-temporal-spatial resolution image acquisition system for a fast ion loss probe. Background Art

[0002] The scintillator-based fast ion loss probe is a probe used in magnetic confinement fusion plasma experimental devices to detect high-energy ions lost from the plasma. Its probe mainly consists of a collimator and a scintillator plate. When high-energy ions that have lost confinement escape to the edge of the plasma, they are first screened by the collimator. The ions that pass through the collimator perform Larmor cyclotron motion in the strong magnetic field of the magnetic confinement device and eventually collide with a certain position on the scintillator plate, emitting fluorescence. Because ions with different energies and pitch angles collide at different locations, experimenters can read the energy and pitch angle of the lost ions based on the location of the fluorescence on the scintillator plate, and then invert the motion trajectory of the lost ions, helping to study the loss mechanism of high-energy ions.

[0003] In order to achieve high spatial resolution and high temporal resolution of the fluorescence pattern in the fast ion loss probe, it is necessary to use a high-speed camera and a photomultiplier tube to collect the light signal at the same time. The spatial resolution of the high-speed camera is higher, which can better distinguish the details in the captured image. However, due to its working principle, the temporal resolution of the high-speed camera is lower and its sensor has poor photosensitivity. In order to ensure the brightness of the picture, it is usually impossible to shoot at a frame rate higher than 1000 frames / second when used for the fast ion loss probe. The photomultiplier tube has a higher temporal resolution, and because it can significantly amplify weak light signals, it can often capture 1M sample points / second signals when used for the fast ion loss probe, but the photomultiplier tube has no spatial resolution capability. If both are used to capture the fluorescence pattern in the fast ion loss probe, the spatial resolution and temporal resolution of the collected signal can be guaranteed;

[0004] Existing fast ion loss probe image acquisition systems typically use a translucent optical beam splitter to split the fluorescence signal in the probe into two beams with mutually perpendicular propagation directions. One beam is transmitted to a high-speed camera via an imaging lens and an image transmission fiber bundle, while the other beam is transmitted to a photomultiplier tube via an imaging lens and an image transmission fiber bundle.

[0005] The problems are:

[0006] 1. There are engineering difficulties in adjusting the angles of the optical beam splitter and the two imaging lenses. The central axes of the two imaging lenses need to be strictly perpendicular to each other, and the heights of the two lenses need to be strictly consistent to ensure the consistency of their imaging optical paths. In addition, the angles between the beam splitter and the central axes of the two lenses need to be strictly 45° to ensure that the light passing through the beam splitter and the light reflected by the beam splitter enter the two imaging lenses respectively, otherwise one or both lenses may not capture an image. Such precise optical adjustment requires a lot of effort from the experimenters and has poor anti-interference performance. Even slight disturbances to the experimental device will affect the installation accuracy of the beam splitter and imaging lenses. The magnetic confinement fusion device is usually accompanied by significant vibrations during experiments, so the feasibility of the optical beam splitter solution is poor.

[0007] 2. The system requires a large amount of space for installation. The optical beam splitter solution needs to acquire fluorescence signals from two mutually perpendicular directions, so it takes up a lot of space in the direction perpendicular to the central axis of the fast ion loss probe. There are usually various other plasma diagnostic equipment outside the magnetic confinement fusion device. In most cases, there is not enough space to install this traditional image acquisition system.

[0008] 3. The high time resolution acquisition end has no spatial resolution capability. The high time resolution acquisition end in the traditional image acquisition system of the fast ion loss probe uses a single photomultiplier tube, which can obtain high time resolution signals but has no spatial resolution capability. It can only give the change of the fast ion loss signal on the entire scintillation screen over time, and cannot distinguish the position of the bright spot on the scintillation screen inside the fast ion loss probe probe. Therefore, it cannot obtain the energy and throwing angle information of the lost fast ions. Summary of the Invention

[0009] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a high temporal and spatial resolution image acquisition system for a fast ion loss probe.

[0010] In order to achieve the above object, the present invention adopts the following technical solutions:

[0011] A high-temporal-spatial resolution image acquisition system for a fast ion loss probe comprises an imaging lens, a spectroscopic image transmission bundle, a photomultiplier tube, a relay lens, and a high-speed camera. The imaging lens is mounted on the rear end of a fast ion loss probe linear introducer outside a magnetic confinement fusion device, and the spectroscopic image transmission bundle is mounted on the rear end of the imaging lens. The spectroscopic image transmission bundle comprises a spectroscopic image transmission bundle input end, a spectroscopic image transmission bundle aggregate bundle, a spectroscopic image transmission bundle splitting end, a spectroscopic image transmission bundle terminal array lead-out bundle, a spectroscopic image transmission bundle terminal array, a spectroscopic image transmission bundle image lead-out bundle, and a spectroscopic image transmission bundle image lead-out end.

[0012] The imaging lens is connected to the input end of the light-splitting image transmission bundle through the F mount of the camera. The light-splitting image transmission bundle includes m*n optical fibers, and the front ends of the m*n optical fibers are tightly aggregated together in the image transmission bundle input end to form an image transmission screen. The light-splitting image transmission bundle input end is the front port of the total aggregated bundle of the light-splitting image transmission bundle. The rear port of the total aggregated bundle of the optical fiber light-splitting image transmission bundle is connected to the light-splitting image transmission bundle splitting end, and the m*n optical fibers are split in the light-splitting image transmission bundle splitting end. There is an image in every several pixels on the light-splitting image transmission bundle input end in the light-splitting image transmission bundle splitting end. The optical fibers corresponding to the pixels are separated into the lead-out bundles of the light-splitting image transmission bundle terminal array, and the optical fibers corresponding to the remaining pixels are separated into the light-splitting image transmission bundle image lead-out bundles. The optical fibers in the light-splitting image transmission bundle image lead-out bundle are re-tightened into an image transmission screen at the position of the light-splitting image transmission bundle image lead-out end. The optical fibers in the lead-out bundle of the light-splitting image transmission bundle terminal array are re-aggregated into several optical fiber terminals at the position of the light-splitting image transmission bundle terminal array. The rear end of the light-splitting image transmission bundle image lead-out end is sequentially installed with a relay lens and a high-speed camera, and the rear end of the light-splitting image transmission bundle terminal array is connected to a photomultiplier tube.

[0013] The relay lens is used to image the image on the end surface of the image output end of the split beam image transmission beam onto the sensor of the high-speed camera.

[0014] The photomultiplier tube is provided with a sensor array, and the terminal interfaces in the light splitting image transmission bundle terminal array match the interfaces on the sensor array.

[0015] The pixel positions in the image output end of the splitting image transmission bundle that are separated into the splitting image transmission bundle terminal array are filled with waste optical fibers, and no light passes through the waste optical fibers.

[0016] The fluorescence pattern on the scintillation screen in the fast ion loss probe is imaged by an imaging lens onto the image transmission screen at the input end of the image transmission beam.

[0017] Preferably, a vacuum observation window is installed at the rear end of the fast ion loss probe linear introducer, and the rear end of the vacuum observation window is connected to the imaging lens. A probe shaft is installed inside the fast ion loss probe linear introducer, and the probe shaft is a hollow pipe inside. A fast ion loss probe probe is installed at the front end of the probe shaft.

[0018] Preferably, the number m*n of optical fibers in the split-beam image transmission bundle is greater than 20,000, thereby ensuring the spatial resolution of the image acquisition system.

[0019] Preferably, the optical fiber corresponding to one pixel out of every k pixels on the splitting image beam input end in the splitting image beam splitting end is separated into the splitting image beam terminal array output beam, and k is usually not more than 16, thereby ensuring the spatial resolution of the splitting image beam terminal array output beam.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In order to solve the problem of engineering difficulties in adjusting the angles of the optical beam splitter and the two imaging lenses, the present invention adopts a solution of splitting the image transmission fiber bundle. The traditional image transmission fiber bundle is formed by bundling several optical fibers. The end face of the image transmission fiber bundle is equivalent to a display screen, wherein each optical fiber is equivalent to a pixel. Since the pixel positions on the two end faces of the fiber bundle correspond one to one, the image on one end face of the fiber bundle can be transmitted to the other end face. The splitting image transmission bundle in the present invention separates one of the two end faces of the traditional image transmission fiber bundle into two end faces. For every several pixels on the end face of the fiber bundle that receives the image input, the optical fiber end corresponding to one pixel is separated to one of the output ends of the fiber bundle, and the optical fiber ends corresponding to the remaining pixels are separated to the other output end of the fiber bundle, thereby separating the image on the input end face of the fiber bundle into the complementary image of the fiber bundle output end one and the image of the fiber bundle output end two.

[0022] The output ends of the two optical fiber bundles are respectively connected to a high-speed camera and a photomultiplier tube, so that the two devices can acquire the fluorescence pattern in the fast ion loss probe probe. In this way, when adjusting the fast ion loss probe image acquisition system, it is only necessary to adjust the lens connected to the input end of the optical fiber bundle so that it is aligned with the scintillation screen in the probe for shooting. Compared with the complex adjustment of the beam splitter and the two imaging lenses in the traditional solution, the difficulty of engineering adjustment is avoided. At the same time, the reduction of optical devices can also improve the stability of the system and avoid the influence of system vibration and touch on imaging accuracy during the experiment.

[0023] 2. To address the problem of a large space required for installing the image acquisition system, the present invention uses a splitting image bundle solution to split the image at the input end of the image transmission fiber bundle into two bundles. The directions of the two fiber bundles at the output end are basically the same, and due to the flexible characteristics of the fiber bundle itself, the image acquisition system does not need to occupy too much space perpendicular to the central axis of the fast ion loss probe.

[0024] 3. To address the problem that the high-time-resolution acquisition end has no spatial resolution capability, the present invention adopts a photomultiplier tube array solution, using a sensor array containing multiple photomultiplier tubes instead of a single photomultiplier tube, so that the high-time-resolution acquisition end has a certain spatial resolution capability, which can distinguish the rapid changes in the energy and pitch angle of the lost fast ions over time. Therefore, it is possible to analyze the impact of the high-frequency magnetic fluid mode in magnetic confinement fusion plasma on the fast ion loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more specifically and intuitively illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments or the prior art.

[0026] Figure 1This is an overall top view of the fast ion loss probe proposed by the present invention;

[0027] Figure 2 This is an overall three-dimensional view of the fast ion loss probe proposed by the present invention;

[0028] Figure 3 A top view of the fast ion loss probe image acquisition system proposed in the present invention;

[0029] Figure 4 This is a detailed diagram of the lead-out terminal of the optical splitting image transmission beam terminal array proposed by the present invention;

[0030] Figure 5 A three-dimensional view of the photomultiplier tube proposed in the present invention;

[0031] Figure 6 This is a front view of the photomultiplier tube proposed by the present invention;

[0032] Figure 7 This is a schematic diagram of the arrangement of the light splitting image transmission beam proposed by the present invention;

[0033] Figure 8 This is a simulated image diagram of the input end of the split-light imaging beam proposed in the present invention;

[0034] Figure 9 This is a simulated image diagram of the image output end of the light splitting imaging beam proposed in the present invention;

[0035] Figure 10 This is a simulated image diagram of the lead-out end of the light splitting image transmission bundle terminal array proposed in the present invention (single-filament optical fiber);

[0036] Figure 11 This is an image simulation diagram of the lead-out end of the splitting image transmission bundle terminal array proposed in the present invention (single-filament optical fiber is aggregated into a terminal array).

[0037] In the figure: 1. Magnetic confinement fusion device; 2. Fast ion loss probe linear introducer; 3. Fast ion loss probe probe; 4. Probe axis; 5. Vacuum observation window; 6. Imaging lens; 7. Spectroscopic image transmission beam input terminal; 8. Spectroscopic image transmission beam aggregate beam; 9. Spectroscopic image transmission beam splitting terminal; 10. Spectroscopic image transmission beam terminal array output beam; 11. Spectroscopic image transmission beam terminal array; 12. Photomultiplier tube; 121. Sensor array; 13. Spectroscopic image transmission beam image output beam; 14. Spectroscopic image transmission beam image output terminal; 15. Relay lens; 16. High-speed camera. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] Reference Figure 1-11 A high spatiotemporal resolution image acquisition system for a fast ion loss probe includes an imaging lens 6, a spectroscopic image transmission beam input terminal 7, a spectroscopic image transmission beam total aggregation bundle 8, a spectroscopic image transmission beam splitting terminal 9, a spectroscopic image transmission beam terminal array lead-out bundle 10, a spectroscopic image transmission beam terminal array 11, a photomultiplier tube 12, a spectroscopic image transmission beam image lead-out bundle 13, a spectroscopic image transmission beam image lead-out terminal 14, a relay lens 15, and a high-speed camera 16. The spectroscopic image transmission beam input terminal 7 is the front port of the spectroscopic image transmission beam total aggregation bundle 8. The front ends of all m*n optical fibers in the spectroscopic image transmission beam are tightly aggregated together in the spectroscopic image transmission beam input terminal 7 to form an image transmission screen. The imaging lens 6 passes through The camera F mount is connected to the spectroscopic imaging beam input terminal 7, and images the fluorescent pattern on the scintillation screen in the fast ion loss probe probe 3 onto the imaging screen. The front port of the optical fiber spectroscopic imaging beam aggregate bundle 8 is connected to the spectroscopic imaging beam splitting terminal 9. All 192*192 optical fibers are split in the spectroscopic imaging beam splitting terminal 9. The optical fiber end corresponding to one pixel is separated to the spectroscopic imaging beam terminal array 11 for every 9 pixels, and the optical fiber ends corresponding to the remaining pixels are separated to the spectroscopic imaging beam image output terminal 14. The pixel positions in the spectroscopic imaging beam image output terminal 14 that are separated to the spectroscopic imaging beam terminal array 11 are filled with waste optical fibers, and no light passes through the waste optical fibers.

[0040] In this embodiment, when processing the split image beam, the light end corresponding to one pixel in every nine pixels is separated to the split image beam terminal array 11. If the image input on the split image beam input terminal 7 is Figure 8 , then the image on the end surface of the image lead-out end 14 of the split beam image transmission bundle can be referred to Figure 9 The image formed by the pixels separated into the beam splitting terminal array 11 is as follows: Figure 10 As shown, in this embodiment, the number of sensors in the photomultiplier tube array 12 is 16*16, so the optical fibers separated into the optical splitting image transmission bundle terminal array 11 are aggregated into 16*16 optical fiber terminals. Thus, the image in the optical splitting image transmission bundle terminal array 11 is as shown in FIG. Figure 11 As shown, the terminal interface in the splitting image beam terminal array 11 matches the interface of the sensor array 121 on the photomultiplier tube 12, so the two can be easily installed.

[0041] A relay lens 15 and a high-speed camera 16 are installed behind the image output terminal 14 of the spectroscopic imaging beam. The relay lens 15 is used to image the image on the end surface of the image output terminal 14 of the spectroscopic imaging beam onto the sensor of the high-speed camera 16 .

[0042] The fast ion loss probe linear introducer 2 is installed on the magnetic confinement fusion device 1, and a vacuum observation window 5 is installed at the end thereof. A probe shaft 4 is installed inside the fast ion loss probe linear introducer 2, and a fast ion loss probe probe head 3 is installed at the front end of the probe shaft 4. The probe shaft 4 is an internal hollow pipe for fixing the fast ion loss probe probe head 3 and providing a dark room for the propagation of the scintillation light signal in the fast ion loss probe probe head 3 to prevent external stray light interference. The fast ion loss probe linear introducer 2 and the vacuum observation window 5 are used to enclose the fast ion loss probe probe head 3 and the probe shaft 4 in the vacuum environment of the magnetic confinement fusion device 1. The scintillation light signal in the fast ion loss probe probe head 3 can be transmitted to the outside world through the vacuum observation window 5. The imaging lens 6 is fixed behind the vacuum observation window 5, so that the scintillation pattern in the fast ion loss probe probe head 3 can be photographed.

[0043] Working principle:

[0044] Specifically, when the magnetic confinement fusion device 1 is conducting a plasma discharge experiment, the lost fast ions escaping from the plasma may enter the fast ion loss probe 3 and hit the scintillating screen to emit fluorescence, and the fluorescence pattern is imaged by the imaging lens 6 on the spectroscopic imaging beam input end 7. The pattern on the spectroscopic imaging beam input end 7 is transmitted to the spectroscopic imaging beam splitting end 9 through the optical fiber in the spectroscopic imaging beam aggregate 8. In the spectroscopic imaging beam splitting end 9, the optical fiber corresponding to one pixel in every nine pixels on the spectroscopic imaging beam input end 7 is separated to the spectroscopic imaging beam terminal array lead. The optical fibers corresponding to the remaining pixels are separated into a split-image beam output bundle 13. At the split-image beam output terminal 14, the separated optical fibers are re-compacted into an image transmission screen, where the positions corresponding to the separated optical fibers are filled with waste optical fibers. The waste optical fibers cannot pass light and therefore appear black on the image transmission screen. In the split-image beam terminal array 11, the separated optical fibers are re-aggregated into a plurality of optical fiber terminals according to their positions on the split-image beam input terminal 7. In this embodiment, they are aggregated into 16*16 optical fiber terminals.

[0045] The fluorescence image on the image lead-out end 14 of the spectroscopic imaging bundle is imaged on the sensor of the high-speed camera 16 by the relay lens 15. The fluorescence image in the spectroscopic imaging bundle terminal array 11 is transmitted to the sensor array 121 via the tightly mounted optical fiber terminals. As a result, the scintillation pattern in the fast ion loss probe 3 is simultaneously transmitted to the two optical signal acquisition devices, the high-speed camera 16 and the photomultiplier tube 12. The fluorescence image on the image lead-out end 14 of the spectroscopic imaging bundle transmitted to the high-speed camera 16 has a relatively high spatial resolution, which can fully utilize the high spatial resolution of the high-speed camera 16 to capture the details of the fluorescence image. The large number of optical fibers on the image lead-out end 14 of the spectroscopic imaging bundle ensures the brightness of the image, which can make up for the disadvantage of the low photosensitivity of the high-speed camera 16.

[0046] Although the photomultiplier tube 12 of the present invention uses an array sensor, its 16*16 spatial resolution is still relatively low compared to the high-speed camera 16. Therefore, the spatial resolution of the fluorescent image transmitted to the photomultiplier tube 12 on the light-splitting image bundle terminal array 11 is low, avoiding the waste of light-splitting image bundle pixels. Since the number of optical fibers separated to the light-splitting image bundle terminal array 11 is small, the brightness of this port will be significantly lower than that of the light-splitting image bundle image output terminal 14. However, the high photosensitivity of the photomultiplier tube 12 allows the optical signal at the light-splitting image bundle image output terminal 14 to still be accurately collected.

[0047] In summary, the high spatiotemporal resolution image acquisition system for the fast ion loss probe described in the present invention can collect the scintillation light signal in the fast ion loss probe probe 3 with high spatial resolution and high temporal resolution at the same time while reducing the difficulty of engineering debugging and occupying a small space.

[0048] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A high temporal and spatial resolution image acquisition system for a fast ion loss probe, comprising an imaging lens (6), a spectroscopic image transmission bundle, a photomultiplier tube (12), a relay lens (15), and a high-speed camera (16), characterized in that: The imaging lens (6) is installed at the rear end of the fast ion loss probe linear introducer (2) outside the magnetic confinement fusion device (1), and a spectroscopic imaging beam is installed at the rear end of the imaging lens (6), and the spectroscopic imaging beam includes a spectroscopic imaging beam input end (7), a spectroscopic imaging beam total aggregation beam (8), a spectroscopic imaging beam splitting end (9), a spectroscopic imaging beam terminal array lead-out beam (10), a spectroscopic imaging beam terminal array (11), a spectroscopic imaging beam image lead-out beam (13) and a spectroscopic imaging beam image lead-out end (14); The imaging lens (6) is connected to the light-splitting image transmission beam input end (7) through the camera F-mount, the light-splitting image transmission beam includes m*n optical fibers, and the front ends of the m*n optical fibers are tightly aggregated together in the image transmission beam input end (7) to form an image transmission screen, the light-splitting image transmission beam input end (7) is the front end of the light-splitting image transmission beam total aggregation bundle (8), the rear end of the light-splitting image transmission beam total aggregation bundle (8) is connected to the light-splitting image transmission beam splitting end (9), and the m*n optical fibers are split in the light-splitting image transmission beam splitting end (9), and in the light-splitting image transmission beam splitting end (9), the optical fiber corresponding to one pixel in every several pixels on the light-splitting image transmission beam input end (7) is split. The optical fibers corresponding to the remaining pixels are separated into the optical splitting image transmission beam terminal array lead-out bundle (10), and the optical fibers corresponding to the remaining pixels are separated into the optical splitting image transmission beam image lead-out bundle (13). The optical fibers in the optical splitting image transmission beam image lead-out bundle (13) are tightly re-aggregated into an image transmission screen at the position of the optical splitting image transmission beam image lead-out end (14). The optical fibers in the optical splitting image transmission beam terminal array lead-out bundle (10) are re-aggregated into a plurality of optical fiber terminals at the position of the optical splitting image transmission beam terminal array (11). The rear end of the optical splitting image transmission beam image lead-out end (14) is sequentially installed with a relay lens (15) and a high-speed camera (16), and the rear end of the optical splitting image transmission beam terminal array (11) is connected with a photomultiplier tube (12); The pixel positions of the split-light image transmission bundle image lead-out end (14) that are separated into the split-light image transmission bundle terminal array (11) are filled with waste optical fibers, and no light passes through the waste optical fibers; A vacuum observation window (5) is installed at the rear end of the fast ion loss probe linear introducer (2), and the rear end of the vacuum observation window (5) is connected to the imaging lens (6). A probe shaft (4) is installed inside the fast ion loss probe linear introducer (2), and the probe shaft (4) is a hollow pipe inside. A fast ion loss probe probe head (3) is installed at the front end of the probe shaft (4); The probe shaft (4) provides a dark room for the propagation of the scintillation light signal in the fast ion loss probe head (3), thereby preventing interference from external stray light; The fast ion loss probe linear introducer (2) and the vacuum observation window (5) are used to seal the fast ion loss probe head and the probe shaft (4) in the vacuum environment of the magnetic confinement fusion device (1); The scintillation light signal in the fast ion loss probe (3) can be transmitted to the outside through the vacuum observation window (5); The imaging lens (6) is fixed behind the vacuum observation window (5) and can capture the scintillation pattern in the fast ion loss probe (3); A sensor array (121) is provided on the photomultiplier tube (12), and the terminal interfaces in the light splitting image transmission beam terminal array (11) match the interfaces on the sensor array (121).

2. The high temporal and spatial resolution image acquisition system for a fast ion loss probe according to claim 1, characterized in that: The relay lens (15) is used to image the image on the end surface of the image lead-out end (14) of the split-beam image transmission beam onto the sensor of the high-speed camera (16).

3. The high temporal and spatial resolution image acquisition system for a fast ion loss probe according to claim 1, characterized in that: The fluorescent pattern on the scintillation screen in the fast ion loss probe head (3) is imaged by the imaging lens (6) onto the image transmission screen at the position of the image transmission beam input end (7).

Images