A two-way magnetic field loss fast ion probe for a magnetic confinement fusion device

Abstract

The application relates to a bidirectional magnetic field loss fast ion detector for a magnetic confinement fusion device, which comprises a clockwise collimator, an anticlockwise collimator, a scintillator sheet, a detector main body, a graphite shell and a light path connecting sheet, the clockwise collimator and the anticlockwise collimator are symmetrically arranged on the two sides of the detector main body, the scintillator sheet is arranged in the detector main body, the graphite shell is sleeved on the outside of the detector main body, the clockwise collimator and the anticlockwise collimator each comprise a collimator front part and a collimator rear part, a fixing groove is formed in the collimator rear part, a collimator rear hole is formed in the fixing groove, the collimator front part is detachably installed in the fixing groove, a cavity which is in communication with the fixing groove is formed in the collimator front part, a collimator front hole is formed in the cavity, one end of the light path connecting sheet is connected with the detector main body, and the other end is connected with a rear-end light path pipeline. The application can adapt to bidirectional annular magnetic fields, can reduce upgrading cost through modular design, and can provide stable installation for the scintillator.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic confinement fusion plasma diagnosis, and particularly relates to a bidirectional magnetic field loss fast ion probe for a magnetic confinement fusion device. BACKGROUND

[0002] The fast ion loss probe based on a scintillator is a probe used to detect high-energy ions lost from a plasma in a magnetic confinement fusion plasma experimental device. The probe head mainly includes a collimator and a scintillator sheet. When the high-energy ions lost from the confinement escape to the edge of the plasma, the high-energy ions are first screened by the collimator, the ions passing through the collimator do Larmor rotation in the strong magnetic field of the magnetic confinement device and finally hit a certain position of the scintillator sheet to emit fluorescence. Since the ions with different energies and angles of projection hit different positions, the experimenter can read the energy and angle of projection of the lost ions according to the position of the scintillator sheet emitting fluorescence, and then inversely calculate the motion track of the lost ions to help study the loss mechanism of high-energy ions.

[0003] For the design of the loss fast ion probe, the common practice on large magnetic confinement fusion devices at present is to use a set of collimator and a piece of scintillator. The collimator includes two parts, and the two parts are two slits. The track of the loss fast ions hits a certain area on the scintillator after collimation through the two slits of the collimator. The current loss fast ion probe has the following problems:

[0004] 1. Only works in a specific direction of the toroidal magnetic field. The force on the charged particles in the magnetic field satisfies the left-hand rule. The reverse of the direction of the magnetic field will lead to the reverse of the Larmor rotation direction of the charged particles. When the toroidal magnetic field in the magnetic confinement fusion device is in the direction designed in the probe, the Larmor rotation of the loss fast ions can pass through the collimator in the probe and hit the scintillator. However, when the toroidal magnetic field is reversed, the Larmor rotation direction of the loss fast ions is reversed, and after passing through the collimator, the loss fast ions will rotate in the opposite direction of the scintillator, so they cannot reach the scintillator, resulting in that the loss fast ions cannot be detected;

[0005] 2. The structure of the probe is difficult to upgrade. In the traditional probe design, each component is integrally machined, which has high machining cost. When the experimental conditions change, the probe can only be replaced as a whole instead of being upgraded by replacing parts;

[0006] 3. The installation of the scintillator sheet is difficult. In the traditional probe design, no installation position for the scintillator sheet is reserved. Generally, the edges of the scintillator sheet are fixed by screws or other components, which makes the installation of the scintillator sheet not firm, and the scintillator sheet is prone to falling off during the experiment. In addition, the local pressure can cause the scintillator sheet to deform, which seriously affects the accuracy of the experimental data.

[0007] Therefore, the application provides a bidirectional magnetic field loss fast ion probe for a magnetic confinement fusion device to solve the problems of strong dependence on magnetic field direction, difficulty in upgrading structure and unstable installation of scintillator of the existing probe. SUMMARY

[0008] To solve the problems in the background art, the application provides a bidirectional magnetic field loss fast ion probe for a magnetic confinement fusion device, which can adapt to bidirectional toroidal magnetic field, reduce upgrading cost through modular design and provide stable installation for scintillator.

[0009] To solve the above problems, the application adopts the following technical scheme: a bidirectional magnetic field loss fast ion probe for a magnetic confinement fusion device, comprising a scintillator sheet, a clockwise collimator, an anticlockwise collimator, a probe main body, a graphite shell and a light path connecting sheet, the clockwise collimator and the anticlockwise collimator are symmetrically arranged on both sides of the scintillator sheet, the clockwise collimator comprises a clockwise collimator front part and a clockwise collimator rear part, the clockwise collimator rear part is provided with a clockwise collimator fixing groove, a clockwise collimator rear hole is formed through the groove wall of the clockwise collimator fixing groove, the clockwise collimator front part is detachably installed in the clockwise collimator fixing groove, the clockwise collimator front part is provided with a clockwise collimator cavity which is in communication with the clockwise collimator fixing groove, and a clockwise collimator front hole is formed through the cavity wall of the clockwise collimator cavity, the clockwise collimator front hole, the clockwise collimator cavity and the clockwise collimator rear hole form a channel for loss fast ions in the plasma region to hit the scintillator sheet, in this embodiment, the anticlockwise collimator is arranged in the same way as the clockwise collimator, but in actual experiments, the two collimators can also be arranged differently according to experimental requirements. The bidirectional collimator system and the scintillator sheet are fixed on the probe main body, and the graphite shell is arranged outside the probe main body; one end of the light path connecting sheet is connected with the probe main body, and the other end is used to connect a rear-end light path pipeline.

[0010] In the application, by setting two sets of collimator structures of clockwise collimator and counterclockwise collimator on two sides of the detector body, when the toroidal magnetic field direction of the magnetic confinement fusion device is the design direction of the clockwise collimator, the loss fast ions perform Larmor cyclotron motion to pass through the clockwise collimator and hit on the scintillator sheet, at this time the clockwise collimator is in the effective state, and the rotation direction of the loss fast ions passing through the counterclockwise collimator on the other side of the detector is opposite to that of the scintillator sheet, so the counterclockwise collimator does not generate experimental signals and is in the invalid state; when the toroidal magnetic field direction of the magnetic confinement fusion device is reversed, the Larmor cyclotron direction of the loss fast ions is reversed, at this time a part of the loss fast ions can still pass through the clockwise collimator, but due to the reverse cyclotron motion, the direction of the loss fast ions after passing through the clockwise collimator is opposite to that of the scintillator sheet, so the loss fast ions cannot hit the scintillator sheet to generate experimental signals, and the clockwise collimator is invalid, at this time the counterclockwise collimator on the other side of the detector, due to the reverse cyclotron motion of the loss fast ions, the rotation direction of the loss fast ions after passing through the counterclockwise collimator is just the direction of the scintillator sheet, so the loss fast ions can hit the scintillator sheet to generate experimental signals, and the counterclockwise collimator is effective. Therefore, the bidirectional magnetic field loss fast ion detector provided by the application can realize automatic adjustment and adaptation to the toroidal magnetic field direction of the magnetic confinement fusion device.

[0011] Further, the bidirectional collimator system further comprises a detector body for fixedly mounting the scintillator sheet, two opposite sides of the detector body are detachably connected with the rear part of the clockwise collimator and the rear part of the counterclockwise collimator respectively, and the side surface of the scintillator sheet is coated with a scintillator coating. In the application, the detector body is provided to provide a mounting basis for the scintillator sheet.

[0012] Further, the outer side of the detector body is sleeved with a graphite shell. In the application, by sleeving the graphite shell outside the detector, other metal parts of the device can be prevented from being exposed to the vacuum environment of the magnetic confinement fusion device, so as to reduce the metal element impurities entering the plasma region and avoid affecting the experiment.

[0013] Further, the inside of the detector body is provided with a clamping groove, two ends of the clamping groove are in contact with the rear part of the clockwise collimator and the rear part of the counterclockwise collimator respectively, and the size of the clamping groove matches the size of the scintillator sheet, and the scintillator sheet is clamped in the clamping groove. In the application, the clamping groove is provided in the detector body to achieve the clamping and fixing of the scintillator sheet, and the size of the scintillator sheet is matched with the size of the clamping groove, so that the side of the scintillator sheet is in the same plane as the edge of the clamping groove. When the rear part of the clockwise collimator and the rear part of the counterclockwise collimator are assembled to the two sides of the detector body, the two collimator rear parts can just abut the two sides of the scintillator sheet, so that the scintillator sheet can be completely fixed and will not fall off, and the two sides of the scintillator sheet will not protrude from the clamping groove, avoiding affecting the assembly precision.

[0014] Further, the graphite shell includes a shell body and a frame, the detector body, the rear part of the clockwise collimator and the rear part of the counterclockwise collimator are installed in the shell body, the front hole of the clockwise collimator and the front hole of the counterclockwise collimator are protruding out of the shell body, the frame is sealingly arranged on the side of the shell body, and the light path connecting piece is detachably connected to the outer end of the detector body and in contact with the side of the frame. In the application, the graphite shell is provided as two parts of the shell body and the frame, which can facilitate the assembly and connection of the detector body, the clockwise collimator and the counterclockwise collimator with the graphite shell.

[0015] Further, the two opposite sides of the shell body are provided with mounting ports, and the two mounting ports are symmetrically arranged, and the front part of the clockwise collimator and the front part of the counterclockwise collimator are correspondingly arranged through the two mounting ports of the shell body.

[0016] Further, the clockwise collimator and the counterclockwise collimator are configured with multiple specifications, the distance from the front hole and the rear hole of the clockwise collimator of different specifications to the scintillator sheet in the y-axis direction is different, and the distance from the front hole and the rear hole of the counterclockwise collimator of different specifications to the scintillator sheet in the y-axis direction is also different. In the application, when the experimental conditions change, such as the increase of the toroidal magnetic field strength of the magnetic confinement fusion device, it is necessary to increase the distance from the collimator front hole and the collimator rear hole to the scintillator sheet in the y-axis direction. Since the application is configured with multiple specifications of the clockwise collimator and the counterclockwise collimator, only the corresponding clockwise collimator and counterclockwise collimator need to be replaced, and other parts of the detector do not need to be reprocessed, thereby improving the upgrading efficiency of the detector and reducing the upgrading cost.

[0017] Further, the bottom of the scintillator sheet is provided with a base made of metal. In the application, the base is made of metal to ensure the mechanical strength of the base.

[0018] The beneficial effects of the present application: the present application adopts the layout design of clockwise collimator and counterclockwise collimator, when the direction of the annular magnetic field is clockwise, the loss of fast ions passes through the clockwise collimator to hit the scintillator sheet, and the counterclockwise collimator is automatically disabled due to the reverse direction of ion cyclotron, when the direction of the magnetic field is switched to counterclockwise, the counterclockwise collimator is enabled, ensuring that the ions continuously hit the scintillator sheet, completely solving the signal loss problem caused by the single dependence of the direction of the magnetic field of the traditional detector, compared with the prior art which only supports a single magnetic field direction, the present application can cover the bidirectional working condition of the magnetic field, significantly expanding the application scenarios of the detector. The present application adopts a modular design, and each key component in the detector can be detachably connected, so that when the experimental conditions change, the upgrading and modification of the detector can be realized by replacing the corresponding parts of the detector, avoiding reprocessing the detector, greatly reducing the time cost and processing cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below in combination with the drawings and examples.

[0020] Figure 1 is a front view of the bidirectional magnetic field loss fast ion detector of the present application;

[0021] Figure 2 is a right view of the bidirectional magnetic field loss fast ion detector of the present application;

[0022] Figure 3 is a working condition simulation diagram of a traditional single-direction magnetic field loss fast ion detector;

[0023] Figure 4 is a working condition simulation diagram of the bidirectional magnetic field loss fast ion detector of the present application;

[0024] Figure 5 is a front view of the bidirectional magnetic field loss fast ion detector of the present application;

[0025] Figure 6 is a side view of the bidirectional magnetic field loss fast ion detector of the present application;

[0026] Figure 7 is a perspective structural schematic diagram of the bidirectional magnetic field loss fast ion detector of the present application;

[0027] Figure 8 is an exploded schematic diagram of the bidirectional magnetic field loss fast ion detector of the present application;

[0028] Figure 9 is a front structure schematic diagram of the clockwise collimator of the present application;

[0029] Figure 10 is a rear structure schematic diagram of the clockwise collimator of the present application;

[0030] Figure 11 Structure diagram of the detector body of the present application;

[0031] Figure 12 Structure diagram of the scintillator sheet of the present application;

[0032] Figure 13 Top view of the installation sectional view of the bidirectional magnetic field loss fast ion detector of the present application;

[0033] Figure 14 Front view of the installation sectional view of the bidirectional magnetic field loss fast ion detector of the present application.

[0034] 1, scintillator sheet; 1.1, scintillator coating; 2, clockwise collimator; 2.1, front hole of clockwise collimator; 2.2, rear hole of clockwise collimator; 2.3, front part of clockwise collimator, 2.4, rear part of clockwise collimator; 2.5, cavity of clockwise collimator; 2.6, fixing groove of clockwise collimator; 3.1, front hole of counterclockwise collimator; 3.2, rear hole of counterclockwise collimator; 3.3, front part of counterclockwise collimator, 3.4, rear part of counterclockwise collimator; 3.5, fixing groove of counterclockwise collimator; 3.6, cavity of counterclockwise collimator; 4, detector body; 4.1, clamping groove; 5, graphite shell; 6, light path connecting sheet; 7, rear-end light path pipe; 8, clockwise detection track; 9, counterclockwise detection track; 10, magnetic confinement fusion device; 11, plasma region. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0036] As Figures 5 to 14The bidirectional magnetic field loss fast ion probe for a magnetic confinement fusion device comprises a scintillator sheet 1, a clockwise collimator 2, an anticlockwise collimator 3, a probe main body 4, a graphite shell 5 and a light path connecting sheet 6. The clockwise collimator 2 and the anticlockwise collimator 3 are symmetrically arranged on the two sides of the scintillator sheet 1. The clockwise collimator 2 comprises a clockwise collimator front part 2.3 and a clockwise collimator rear part 2.4. The clockwise collimator rear part 2.4 is provided with a clockwise collimator fixing groove 2.6. The groove wall of the clockwise collimator fixing groove 2.6 is provided with a clockwise collimator rear hole 2.2. The clockwise collimator front part 2.3 is detachably installed in the clockwise collimator fixing groove 2.6. The clockwise collimator front part 2.3 is provided with a clockwise collimator cavity 2.5 which is in communication with the clockwise collimator fixing groove 2.6. The cavity wall of the clockwise collimator cavity 2.5 is provided with a clockwise collimator front hole 2.1. The clockwise collimator front hole 2.1, the clockwise collimator cavity 2.5 and the clockwise collimator rear hole 2.2 form a channel for the loss fast ion in the plasma region to hit the scintillator sheet 1. In the embodiment, the anticlockwise collimator 3 is arranged in the same way as the clockwise collimator 2. However, in actual experiments, the two collimators can also be arranged differently according to experimental requirements. The bidirectional collimator system and the scintillator sheet 1 are fixed on the probe main body 4. The outside of the probe main body 4 is sleeved with the graphite shell 5. One end of the light path connecting sheet 6 is connected with the probe main body 4, and the other end is used for connecting a rear-end light path pipeline 7.

[0037] In the application, by setting two sets of collimator structures of clockwise collimator 2 and counterclockwise collimator 3 on two sides of detector main body 4 respectively, when the toroidal magnetic field direction of magnetic confinement fusion device 10 is the design direction of clockwise collimator 2, loss fast ions perform Larmor cyclotron motion to pass through clockwise collimator 2 and hit on scintillator sheet 1, at this time, clockwise collimator 2 is in an effective state, and the rotation direction of loss fast ions passing through counterclockwise collimator 3 on the other side of the detector is opposite to that of scintillator sheet 1, so that counterclockwise collimator 3 does not generate an experimental signal and is in an ineffective state; when the toroidal magnetic field direction of magnetic confinement fusion device 10 is reversed, the Larmor cyclotron direction of loss fast ions is reversed, at this time, a part of loss fast ions can still pass through clockwise collimator 2, but due to the reverse cyclotron motion, the direction of the loss fast ions moving towards scintillator sheet 1 after passing through clockwise collimator 2 is opposite, so that the loss fast ions do not hit scintillator sheet 1 to generate an experimental signal, and clockwise collimator 2 is ineffective, at this time, counterclockwise collimator 3 on the other side of the detector, due to the reverse cyclotron motion of loss fast ions, the rotation direction of the loss fast ions after passing through counterclockwise collimator 3 is exactly the direction of scintillator sheet 1, so that the loss fast ions can hit scintillator sheet 1 to generate an experimental signal, and counterclockwise collimator 3 is effective. Thus, the bidirectional magnetic field loss fast ion detector provided by the application can realize automatic adjustment and adaptation to the toroidal magnetic field direction of magnetic confinement fusion device 10.

[0038] Further, the bidirectional collimator system further comprises a detector main body 4 for fixedly mounting the scintillator sheet 1, two opposite sides of the detector main body 4 are respectively detachably connected with the rear part of the clockwise collimator 2.4 and the rear part of the counterclockwise collimator 3.4, and the side surface of the scintillator sheet 1 is coated with a scintillator coating 1.1. In the application, the detector main body 4 is provided to provide a mounting basis for the scintillator sheet 1.

[0039] Further, the outer side of the detector main body 4 is sleeved with a graphite shell 5. In the application, by sleeving the graphite shell 5 outside the detector, other metal components of the device can be prevented from being exposed to the vacuum environment of magnetic confinement fusion device 10, so as to reduce the metal element impurities entering the plasma region 11 and avoid affecting the experiment.

[0040] Further, the inside of the detector body 4 is provided with a clamping groove 4.1, two ends of the clamping groove 4.1 are in contact with the clockwise collimator rear part 2.4 and the counterclockwise collimator rear part 3.4 respectively, and the size of the clamping groove 4.1 matches the size of the scintillator sheet 1, and the scintillator sheet 1 is clamped in the clamping groove 4.1. In the present application, by providing the clamping groove 4.1 in the detector body 4, the scintillator sheet 1 is clamped and fixed, and the size of the scintillator sheet 1 matches the size of the clamping groove 4.1, so that the side of the scintillator sheet 1 is in the same plane as the edge of the clamping groove 4.1, and when the clockwise collimator rear part 2.4 and the counterclockwise collimator rear part 3.4 are assembled to both sides of the detector body 4, the two collimator rear parts can abut the two sides of the scintillator sheet 1, so that the scintillator sheet 1 can be completely fixed and will not fall off, and the two sides of the scintillator sheet 1 will not protrude from the clamping groove 4.1, avoiding affecting the assembly precision.

[0041] Further, the graphite shell 5 includes a shell body and a frame, the detector body 4, the clockwise collimator rear part 2.4 and the counterclockwise collimator rear part 3.4 are installed in the shell body, the clockwise collimator front hole 2.1 and the counterclockwise collimator front hole 3.1 protrude out of the shell body, the frame is sealingly arranged on the side of the shell body, and the light path connecting piece 6 is detachably connected to the outer end of the detector body 4 and in contact with the side of the frame. In the present application, by providing the graphite shell 5 as two parts of the shell body and the frame, the detector body 4, the clockwise collimator 2 and the counterclockwise collimator 3 can be easily assembled with the graphite shell 5.

[0042] Further, the two opposite sides of the shell body are provided with mounting openings, and the clockwise collimator front part 2.3 and the counterclockwise collimator front part 3.3 pass through the two mounting openings of the shell body one by one.

[0043] Further, the clockwise collimator 2 and the counterclockwise collimator 3 are configured with multiple specifications, the distances from the front hole 2.1 and the rear hole 2.2 of the clockwise collimator to the scintillator sheet 1 in the y-axis direction are different for different specifications, and the distances from the front hole 3.1 and the rear hole 3.2 of the counterclockwise collimator to the scintillator sheet 1 in the y-axis direction are also different for different specifications. In the present application, when the experimental conditions change, such as the increase of the toroidal magnetic field strength of the magnetic confinement fusion device 10, it is necessary to increase the distance from the front hole and the rear hole of the collimator to the scintillator sheet 1 in the y-axis direction. Since the present application is configured with multiple specifications of the clockwise collimator 2 and the counterclockwise collimator 3, it is only necessary to replace the corresponding clockwise collimator 2 and counterclockwise collimator 3, and other parts of the detector do not need to be reprocessed, thereby improving the upgrading efficiency of the detector and reducing the upgrading cost.

[0044] Further, the bottom of the scintillator sheet 1 is provided with a base made of metal. In the present application, the base is made of metal to ensure the mechanical strength of the base.

[0045] In the present embodiment, the thickness of the base is greater than 0.5 mm. Setting the thickness of the base to be greater than 0.5 mm can effectively prevent the base from deforming when subjected to external force, thereby improving the reliability of the experiment.

[0046] The assembling process of the application: before the experiment, the device needs to be assembled in the laboratory environment, first, the scintillator sheet 1 is installed into the clamping groove 4.1 of the detector main body 4 with the scintillator coating 1.1 outward, to ensure that the loss fast ions reaching the scintillator sheet 1 can react with the scintillator coating 1.1 to emit scintillation light, then the clockwise collimator front part 2.3 is installed into the clockwise collimator fixing groove 2.6 corresponding to the clockwise collimator rear part 2.4, and is fixed by bolts, so that the relative position of the clockwise collimator front hole 2.1 and the clockwise collimator rear hole 2.2 is fixed, to ensure that the collimation effect of the clockwise collimator 2 will not be affected due to the change of the relative position of the clockwise collimator front hole 2.1 and the clockwise collimator rear hole 2.2; then the counterclockwise collimator 3 is installed in the same way; then the clockwise collimator rear part 2.4 and the counterclockwise collimator rear part 3.4 are fixed on the opposite sides of the detector main body 4 by bolts, before the installation of the two collimators is completed, the scintillator sheet 1 can slide in the clamping groove 4.1, after the installation of the two collimators is completed, the scintillator sheet 1 is completely fixed in the clamping groove 4.1 by the clockwise collimator rear part 2.4 and the counterclockwise collimator rear part 3.4, then the shell main body and the frame body of the graphite shell 5 are respectively sleeved from the two sides of the detector main body 4, and then the light path connecting piece 6 is fixed on the detector main body 4 by bolts, during the experiment, the rear end light path pipeline 7 can be connected through the light path connecting piece 6, so as to complete the transmission and collection of optical signals; then the detector is sent into the vacuum environment through the vacuum window of the magnetic confinement fusion device 10, and the detector needs to be close to the plasma area 11 to facilitate receiving the loss fast ions escaping from the plasma area 11.

[0047] The working principle of the application: when the magnetic confinement fusion device 10 conducts an experiment, a strong toroidal magnetic field will be generated inside it to confine charged particles inside the safe plasma area 11, and the toroidal magnetic field may be applied in two directions during the experiment, when the toroidal magnetic field is clockwise, the clockwise collimator 2 is effective, and the loss fast ions perform Larmor cyclotron motion through the clockwise collimator 2 and hit the scintillator sheet 1, the motion track can be referred to as Figures 1 to 4When the clockwise probe track 8 in the figure is in the clockwise direction, the loss fast ions pass through the clockwise collimator 2, and the loss fast ions rotate in the same direction as the scintillator sheet 1, so the clockwise collimator 2 can produce the experimental signal; when the clockwise probe track 8 in the figure is in the anticlockwise direction, the loss fast ions pass through the anticlockwise collimator 3 on the other side of the probe body 4, and the loss fast ions rotate in the opposite direction of the scintillator sheet 1, so the anticlockwise collimator 3 cannot produce the experimental signal and is in the failure state; when the toroidal magnetic field direction of the magnetic confinement fusion device 10 is anticlockwise, the Larmor rotation direction of the loss fast ions is reversed, at this time a part of the loss fast ions can still pass through the clockwise collimator 2, but due to the reverse rotation, the direction of the loss fast ions moving to the scintillator sheet 1 is opposite, so the loss fast ions cannot hit the scintillator sheet 1 to produce the experimental signal, and the clockwise collimator 2 is in the failure state; at this time, the anticlockwise collimator 3 on the other side of the probe body 4, due to the reverse rotation of the loss fast ions, the direction of the loss fast ions rotating after passing through the anticlockwise collimator 3 is the same as the direction of the scintillator sheet 1, so the loss fast ions can hit the scintillator sheet 1 to produce the experimental signal, and the anticlockwise probe track 9 in the figure can be referred to for the motion track of the loss fast ions. Figure 1 、 Figure 2 and Figure 4 the anticlockwise probe track 9. Thus, the bidirectional magnetic field loss fast ion probe provided by the present application can realize the automatic adjustment and adaptation to the toroidal magnetic field direction of the magnetic confinement fusion device.

[0048] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bidirectional magnetic field loss fast ion detector for magnetic confinement fusion devices, characterized in that, include: A bidirectional collimator system includes a scintillator plate (1), a clockwise collimator (2), a counterclockwise collimator (3), and a detector body (4). The scintillator plate (1) is fixedly mounted on the detector body (4). The clockwise collimator (2) and the counterclockwise collimator (3) are symmetrically arranged on both sides of the scintillator plate (1). The clockwise collimator (2) includes a clockwise collimator front part (2.3) and a clockwise collimator rear part (2.4). A clockwise collimator fixing groove (2.6) is provided on the clockwise collimator rear part (2.4). A clockwise collimator rear hole (2.2) is provided through the groove wall of the clockwise collimator fixing groove (2.6). The clockwise collimator front part (2.3) is detachably installed in the clockwise collimator fixing groove (2.6). The clockwise collimator front part (2.3) is provided with a clockwise collimator cavity (2.5) communicating with the clockwise collimator fixing groove (2.6). The clockwise collimator front hole (2.1) is provided through the cavity wall of the clockwise collimator cavity (2.5). The clockwise collimator front hole (2.1), the clockwise collimator cavity (2.5) and the clockwise collimator rear hole (2.2) are used to form a channel for loss fast ions to strike the scintillator sheet (1) in the plasma region. The counterclockwise collimator (3) has the same structure and installation method as the clockwise collimator (2). The two opposite sides of the detector body (4) are detachably connected to the clockwise collimator rear part (2.4) and the counterclockwise collimator rear part (3.4) of the counterclockwise collimator (3). One end of the optical path connecting piece (6) is connected to the bidirectional collimator system, and the other end is used to connect to the rear optical path pipe (7).

2. A bidirectional magnetic field loss fast ion detector for a magnetic confinement fusion device according to claim 1, characterized in that: The scintillator sheet (1) has a scintillator coating (1.1) on its side.

3. A bidirectional magnetic field loss fast ion detector for a magnetic confinement fusion device according to claim 2, characterized in that: The detector body (4) is fitted with a graphite shell (5) on its outer side.

4. A bidirectional magnetic field loss fast ion detector for a magnetic confinement fusion device according to claim 3, characterized in that: The detector body (4) has a through slot (4.1) inside. The two ends of the slot (4.1) are in contact with the rear part (2.4) of the clockwise collimator and the rear part (3.4) of the counterclockwise collimator, respectively. The size of the slot (4.1) matches the size of the scintillator (1), and the scintillator (1) is engaged in the slot (4.1).

5. A bidirectional magnetic field loss fast ion detector for a magnetic confinement fusion device according to claim 3, characterized in that: The graphite shell (5) includes a shell body and a frame. The detector body (4), the rear part of the clockwise collimator (2.4), and the rear part of the counterclockwise collimator (3.4) are installed inside the shell body. The front hole (2.1) of the clockwise collimator and the front hole (3.1) of the counterclockwise collimator (3) both extend outside the shell body. The frame is sealed on the side of the shell body. The optical path connecting piece (6) is detachably connected to the outer end of the detector body (4) and contacts and cooperates with the side of the frame.

6. A bidirectional magnetic field loss fast ion detector for a magnetic confinement fusion device according to claim 5, characterized in that: The outer shell body has two mounting ports on its two opposite sides. The two mounting ports are symmetrically arranged. The front part (2.3) of the clockwise collimator and the front part (3.3) of the counterclockwise collimator (3) pass through the two mounting ports of the outer shell body in a one-to-one correspondence.

7. A bidirectional magnetic field loss fast ion detector for a magnetic confinement fusion device according to any one of claims 1 to 6, characterized in that: The clockwise collimator (2) and the counterclockwise collimator (3) are configured in various specifications. The distances from the front hole (2.1) and the rear hole (2.2) of the clockwise collimator in the y-axis direction to the scintillator plate (1) are different for different specifications. The distances from the front hole (3.1) and the rear hole (3.2) of the counterclockwise collimator in the y-axis direction to the scintillator plate (1) are also different for different specifications.

8. A bidirectional magnetic field loss fast ion detector for a magnetic confinement fusion device according to any one of claims 1 to 6, characterized in that: The bottom of the scintillator sheet (1) is provided with a metal base.

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