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Liquid lithium target system and forming method of flowing liquid lithium target

A liquid lithium and auxiliary system technology, applied in X-ray/γ-ray/particle irradiation therapy, neutron source, etc., can solve the problem of staying in the conceptual stage, no implementation case, no introduction to produce stable and adjustable liquid lithium targets, etc. problem, to achieve the effect of convenient adjustment and stable thickness

Pending Publication Date: 2022-04-05
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current liquid lithium target preparation system is still in the conceptual stage, and there are no successful implementation cases
The utility model patent CN201922254176.0 introduces a BNCT liquid lithium target device, but does not introduce how to produce a stable and adjustable liquid lithium target

Method used

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  • Liquid lithium target system and forming method of flowing liquid lithium target
  • Liquid lithium target system and forming method of flowing liquid lithium target
  • Liquid lithium target system and forming method of flowing liquid lithium target

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In Embodiment 1, the liquid lithium target system includes a target chamber 5 and an auxiliary system;

[0038] The target chamber 5 includes a liquid inlet target tube 3, a nozzle 502, a concave back wall 505 and a liquid outlet target tube 4 connected in sequence;

[0039] The auxiliary system includes a lithium storage tank 1 sequentially connected to the liquid outlet target tube 4, a throttle valve 2, and the throttle valve 2 is connected to the liquid inlet target tube 3, so that the auxiliary system forms a lithium supply circulation loop for the target chamber 5;

[0040] The liquid inlet target tube 3 includes a section of expanding diameter pipeline 501 adjacent to the nozzle 502; the nozzle 502 includes a nozzle channel 5021 whose thickness is tapered along the outlet of the expanding diameter pipeline 501 to the direction of the concave back wall 505; the initial section of the nozzle channel 5021 is connected to the The outlet of the expanded diameter pipe ...

Embodiment 2～5

[0051] In Examples 2-5, the liquid lithium target system as described in Example 1 was used, and the specific parameters are shown in Table 1. According to the data in Table 1, it can be known that Examples 1-5 all formed stable liquid lithium films.

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Abstract

The invention discloses a liquid lithium target system and a forming method of a flowing liquid lithium target. The liquid lithium target system comprises a target chamber and an auxiliary system, the target chamber comprises a liquid inlet target tube, a nozzle, a concave back wall and a liquid outlet target tube which are connected in sequence; the auxiliary system comprises a lithium storage tank and a throttle valve which are sequentially connected with the liquid outlet target tube, and the throttle valve is connected with the liquid inlet target tube, so that the auxiliary system forms a lithium supply circulation loop of the target chamber; the liquid inlet target tube comprises a section of expanding pipeline adjacent to the nozzle; the nozzle comprises a nozzle channel of which the thickness is gradually reduced in the direction from the outlet of the expanding pipeline to the concave back wall; the initial section of the nozzle channel is connected with an outlet of the diameter expanding pipeline, the middle-rear section of the nozzle channel is in smooth transition in the tangential direction of the initial arc section of the concave back wall to be connected with the concave back wall, an initial flow channel is formed, and the curvature radius of the initial flow channel is 80%-120% of the curvature radius of the initial arc section of the concave back wall. The liquid lithium target system can generate a lithium film with stable and adjustable thickness.

Description

technical field [0001] The invention relates to a liquid lithium target system and a method for forming the flowing liquid lithium target. Background technique [0002] The neutron source for BNCT treatment is mainly composed of a proton accelerator, a neutron target, and a beam shaping module. Among them, the neutron target is usually made of metal thin films such as lithium or beryllium, and the lithium target is divided into solid lithium target and liquid lithium target. Solid-state lithium target is the current mainstream technology, which has the advantages of simple equipment and low cost. The solid lithium target is generally covered on the copper substrate, and the thickness of the lithium target is usually 20-50 μm. Due to the low melting point of solid lithium (179°C) and poor thermal conductivity, the lithium film is easy to melt and evaporate under neutron bombardment, and not only has a short service life. , is unstable at runtime, and causes 7 The problem of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/10G21G4/02
Inventor 赵素芳
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI