CN-116981145-B - Strong X-ray radiation source capable of blocking Z pinch splash and production method thereof

CN116981145BCN 116981145 BCN116981145 BCN 116981145BCN-116981145-B

Abstract

The invention particularly relates to a strong X-ray radiation source capable of blocking Z pinch splashes and a production method thereof, which solve the technical problems that the existing Z pinch splashes blocking technology is difficult to realize the protection of diagnostic equipment and the normal operation of an X-ray radiation effect experiment is influenced. The strong X-ray radiation source capable of blocking Z pinch splashes comprises a photoelectric detector, a time delay machine, a light limiting slit, a laser, a Z pinch load and a Z pinch splashes blocking device, wherein the Z pinch splashes blocking device comprises a clamp, a mounting bracket, a disc and a motor, the light limiting slit is arranged on an X-ray light path emitted by the Z pinch load, the photoelectric detector is arranged on an emitting laser light path of the laser, the disc is connected with a driving shaft of the motor through the clamp, the photoelectric detector is arranged on the mounting bracket, and the time delay machine is used for delaying a trigger signal of the photoelectric detector until the light limiting slit and the opening overlap or overlap and send to the Z pinch load, so that the purpose of protecting Z pinch diagnosis equipment can be achieved.

Inventors

YANG HAILIANG
WANG GANG

Assignees

西北核技术研究所

Dates

Publication Date: 20260505
Application Date: 20230725

Claims (10)

1. A strong X-ray radiation source capable of blocking Z pinch splashes comprises a photoelectric detector (6), a time delay machine, a light limiting slit (2), a laser (5) and a Z pinch load (8), wherein the time delay machine, the light limiting slit (2) and the laser are arranged on an external experiment platform; the device is characterized by also comprising a Z pinch splash blocking device; The Z pinch splash blocking device comprises a clamp (7), a mounting bracket (4), a disc (1) arranged on the mounting bracket (4) and a motor (3); The light limiting slit (2) is vertically arranged on an X-ray light path from which the Z pinch load (8) exits; the photoelectric detector (6) is vertically arranged on an emergent laser light path of the laser (5); The optical fiber laser comprises a disc (1), a laser device (5), a photoelectric detector (6) and a clamp (7), wherein the disc (1) is positioned between a light limiting slit (2) and a Z pinch load (8) and between the laser device (5) and the photoelectric detector (6), and the disc (1) is connected with a driving shaft of a motor (3) through the clamp (7); The photoelectric detector (6) is arranged on the mounting bracket (4) and is used for transmitting a trigger signal and triggering the Z pinch load (8) to implode through the delay machine to transmit X rays; The delay machine is used for delaying the trigger signal of the photoelectric detector (6) until the light limiting slit (2) and the opening (9) are overlapped or overlapped and then sent to the Z pinch load (8).
2. The strong X-ray radiation source capable of blocking Z pinch spatter according to claim 1, characterized in that: the two sides of the center of the disc (1) are provided with thickening structures (11) for enhancing the stress of the disc (1); the thickening structure (11) is matched with the clamp (7).
3. The strong X-ray radiation source capable of blocking Z pinch spatter according to claim 2, characterized in that: the device also comprises a weight piece (10) which is used for balancing the mass center of the disc (1) to the circle center of the disc (1); the weight pieces (10) are arranged on two sides of the opening (9) close to the center of the disc (1).
4. A strong X-ray radiation source capable of blocking Z pinch splashes according to claim 1 or 2 or 3, characterized in that: The light limiting slit (2) is of a rectangular structure; The opening (9) is of a concave structure or a V-shaped structure, the angle theta of the opening (9) is 1-10 degrees, or the opening (9) is of a rectangular structure.
5. A strong X-ray radiation source capable of blocking Z pinch splashes comprises a photoelectric detector (6), a time delay machine, a light limiting slit (2), a laser (5) and a Z pinch load (8), wherein the time delay machine, the light limiting slit (2) and the laser are arranged on an external experiment platform; the device is characterized by also comprising a Z pinch splash blocking device; The Z pinch splash blocking device comprises a clamp (7), a mounting bracket (4), a disc (1) arranged on the mounting bracket (4) and a motor (3); The light limiting slit (2) is vertically arranged on an X-ray light path from which the Z pinch load (8) exits; the photoelectric detector (6) is vertically arranged on an emergent laser light path of the laser (5); The laser device comprises a disc (1), a light limiting slit (2), a Z pinch load (8), a laser (5) and a photoelectric detector (6), wherein the disc (1) is connected with a driving shaft of a motor (3) through a clamp (7), two openings (9) with opposite directions are formed in the disc (1) and are used for penetrating laser and X rays, the two openings (9) with opposite directions are formed in the same diameter of the disc (1), and the size of the openings (9) is larger than that of the light limiting slit (2); The photoelectric detector (6) is arranged on the mounting bracket (4) and is used for transmitting a trigger signal and triggering the Z pinch load (8) to implode through the delay machine to transmit X rays; The delay machine is used for delaying the trigger signal of the photoelectric detector (6) until the light limiting slit (2) and the opening (9) are overlapped or overlapped and then sent to the Z pinch load (8).
6. The strong X-ray radiation source capable of blocking Z-pinch spatter according to claim 5, wherein: the two sides of the center of the disc (1) are provided with thickening structures (11) for enhancing the stress of the disc (1); the thickening structure (11) is matched with the clamp (7).
7. The strong X-ray radiation source capable of blocking Z-pinch spatter according to claim 6, wherein: The light limiting slit (2) is of a rectangular structure; the opening (9) is of a concave structure or a V-shaped structure, the angle theta of the opening (9) is 1-10 degrees, or the opening (9) is of a rectangular structure.
8. A method of generating strong X-rays that block Z pinch spatters, comprising the steps of: 1) Determining the radius of the disc (1) and the angle of the opening (9) according to the size of the light limiting slit (2); 2) Calculating the rotation speed of the disc (1); 3) Preparing a strong X-ray radiation source capable of blocking Z pinch spatter according to any one of claims 1-7; 4) Starting the laser (5), starting the motor (3) to drive the disc (1) to rotate, and pre-starting the Z pinch load (8) after the disc (1) rotates stably so as to keep a pre-trigger state; When the opening (9) rotates to a position opposite to the photoelectric detector (6), the photoelectric detector (6) receives a laser signal sent by the laser (5) and sends a trigger signal to the delay machine; When the opening (9) rotates to a position opposite to the light limiting slit (2), the trigger signal which is delayed by the delay machine synchronously triggers the Z pinch load (8) to implode and emit X rays, the X rays are injected into the light limiting slit (2) through the opening (9), and then the disc (1) shields the light limiting slit (2) to finish Z pinch splash blocking.
9. The method for generating strong X-rays capable of blocking Z pinch spatter according to claim 8, wherein step 2) is specifically: in the step 1), the light limiting slit (2) is of a rectangular structure; the size of the disc (1) is determined from the light limiting slit (2) by: ; wherein R is the radius of the disc (1), θ is the angle of the opening (9), R is the width of the light limiting slit (2), The length of the light limiting slit (2).
10. The method of generating strong X-rays capable of blocking Z pinch spatters according to claim 9, characterized in that step 2) is specifically: according to the Z pinch splash speed v, the distance L from the implosion center of the Z pinch load (8) to the light limiting slit (2) and the angle of the opening (9) The rotational speed n of the disc (1) is calculated by the following formula: 。

Description

Strong X-ray radiation source capable of blocking Z pinch splash and production method thereof Technical Field The invention particularly relates to a strong X-ray radiation source capable of blocking Z pinch spatters and a generation method thereof, which are used for blocking Z pinch spatters generated by implosion of Z pinch plasmas by using a rotating disc in Z pinch related experiments. Background The Z pinch technology is characterized in that when MA-level high current generated by utilizing a pulse power technology flows through a wire array or a gas load, the load is heated and ionized to form plasma, the plasma accelerates implosion to an axis under the action of Lorentz force generated by flowing through the axial high current of the plasma, high-temperature and high-density plasma is formed at the implosion center, and finally, pulse strong X-rays are generated through line radiation, compound radiation and bremsstrahlung radiation. Z pinch is used as a strong X-ray radiation source and has important application in the fields of inertial confinement fusion, X-ray thermodynamic effect, laboratory celestial body physics, high-energy density physics, material physical properties and the like. But after Z pinch X-ray light emission, the bouncing of the plasma column can generate Z pinch splashes up to 10km/s in speed, which can contaminate numerous optical diagnostic devices used in Z pinch experiments, reduce their lifetime, reduce their measurement accuracy, and even lead to diagnostic system failures. In addition, the generation of the Z pinch spatter also affects the normal running of the X-ray radiation effect experiment, and therefore, the Z pinch spatter generated by the Z pinch plasma implosion needs to be effectively blocked. The Z pinch splash barrier technique currently used is typically a fast valve barrier technique. The design concept of the technology is that a driving device of a fast valve is synchronously triggered during X-ray emission, so that the fast valve moves along a straight line in tens of microseconds in an acceleration way and stagnates at a diagnosis window, and shielding of Z pinch splashes before the Z pinch splashes reach the diagnosis window is achieved. The technique requires that the shutter only starts to accelerate at the moment of X-ray emission, so the requirements on the driving device are very strict, the maximum speed obtained by the shutter is limited, and good protection effect cannot be achieved for some diagnostic windows which are closer to the Z pinch. Furthermore, since the fast valve moving at high speed needs to be stopped at the diagnostic window, the requirement of the technology on the braking system is also very strict, a certain mechanical strength is required, and the fast valve cannot be made to rebound. Due to the limitations of the drive and braking system, the maximum speed achieved by the shutter is limited and is accompanied by a large time jitter, so that the blocking effect on Z pinch splashes is limited. Disclosure of Invention The invention aims at solving the technical problems that the prior Z pinch splash blocking technology is difficult to realize the protection of diagnostic equipment and the normal operation of an X-ray radiation effect experiment is influenced, and provides a strong X-ray radiation source capable of blocking Z pinch splashes and a generation method thereof, so that the optical channel is blocked rapidly after the Z pinch X-rays are incident on the diagnostic equipment, and the purpose of protecting the Z pinch diagnostic equipment is achieved. In order to solve the technical problems, the invention adopts the following technical scheme: a strong X-ray radiation source capable of blocking Z pinch splashes comprises a photoelectric detector, a delay time, a light limiting slit, a laser and a Z pinch load, wherein the delay time, the light limiting slit, the laser and the Z pinch load are arranged on an external experiment platform; the device is characterized by also comprising a Z pinch splash blocking device; the Z pinch splash blocking device comprises a clamp, a mounting bracket, a disc arranged on the mounting bracket and a motor; the light limiting slit is vertically arranged on an X-ray optical path from which the Z pinch load exits; The photoelectric detector is vertically arranged on an emergent laser light path of the laser; The disc is positioned between the light limiting slit and the Z pinch load and between the laser and the photoelectric detector, and is connected with a driving shaft of the motor through the clamp; The photoelectric detector is arranged on the mounting bracket and is used for transmitting a trigger signal and triggering the Z pinch load to implode to transmit X rays through the delay machine; The delay machine is used for delaying the trigger signal of the photoelectric detector until the light limiting slit and the opening overlap or coincide and send the trigger signal to the