Neutron generation target

A neutron and target material technology, applied in the field of high-power neutron generation targets, can solve the problems of difficult installation, reduce heat transfer effect, damage cooling structure, etc., achieve uniform distribution of heat removal capacity, enhance heat transfer effect, Avoid the effects of direct radiation

Pending Publication Date: 2021-10-26
CHINA SPALLATION NEUTRON SOURCE SCI CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are the following problems: first, the temperature measuring line of the thermocouple in the above scheme is drawn out from the vacuum side, and needs to be drawn out through a vacuum wall-penetrating piece, which is difficult to arrange, and the arrangement of thermocouples at multiple different positions makes installation more difficult; Second, in the case of high beam power, the lead wire or thermocouple of the temperature measuring element that penetrates into the center of the beam will be directly irradiated by the beam, causi

Method used

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Examples

Experimental program
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Example Embodiment

[0026] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings:

[0027] like Figure 1-5 As shown in the figure, a neutron generating target comprises a target material layer 1, a particle migration layer 2, a microchannel base layer 3 and a cover plate layer 4 which are sequentially attached and connected to form an integrated multilayer Structural target body, there are multiple sets of thermocouple assemblies 5 on the target body; the surface of the microchannel base layer 3 is processed with multiple rows of fins 31, and tiny heat dissipation channels are formed between adjacent fins 31, which are referred to as microchannels for short.

[0028] In the present invention, the neutron generating target detects the temperature of each point on the target body through the plug-in thermocouple assembly 5, and uses the temperature value of each point on the target body layer to infer whether the temperatu...

Example Embodiment

[0034] Embodiment 1: Lithium is used as the target material layer 1, wherein the target body fins 31 are of equal height, specifically 3 mm, the spacing is 1 mm, and the width is 1 mm; the inlet and outlet 32 ​​are semicircular structures with a diameter of 40 mm, and the thermocouple is spaced around it. Both are 20mm.

[0035] like Figure 1-6 As shown in the figure, a neutron generating target comprises a target material layer 1, a particle migration layer 2, a microchannel base layer 3 and a cover plate layer 4 which are sequentially attached and connected to form an integrated multilayer Structural target body, the cover plate layer 4 seals and surrounds the microchannel base layer 3 at the bottom by welding or screwing, and forms a cavity structure, and both ends of the cavity structure are provided with inlets for the flow of cooling medium 33 and the outlet 32 ​​ensure the mechanical strength of the connection.

[0036] Among them, the microchannel base layer 3 is us...

Example Embodiment

[0040] Embodiment 2: Lithium oxide is used as the target material layer 1, wherein the target body fins 31 are of equal height, specifically 5 mm, 120 mm in length, 2 mm in width, and the spacing between each fin 31 is 2 mm.

[0041] The difference between the second embodiment and the first embodiment is that in the first embodiment, lithium is used as the target material, and its melting point is relatively low. of melting. In addition, the heat dissipation technology in the first embodiment adopts a conventional micro-channel structure, and the heat dissipation effect may not achieve the desired effect when extreme conditions such as a high degree of beam concentration occur. in as Figure 7 In the second embodiment shown, lithium oxide is used as the target material layer 1, wherein the target body fins 31 are of equal height, specifically 5 mm, 120 mm in length, 2 mm in width, and the distance between each fin 31 is 2 mm; A raised structure 34 is provided at the center ...

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Abstract

The invention relates to the technical field of target bodies driven by accelerators, in particular to a high-power neutron generation target for driving an accelerator, which has an efficient cooling function and a temperature and beam spot monitoring function. The neutron generation target comprises a target material layer, a particle migration layer, a micro-channel substrate layer and a cover plate layer which are sequentially connected in an attached mode to form an integrated multi-layer structure target body, and a plurality of thermocouple assemblies are arranged on the target body. A plurality of rows of fins are machined on the surface of the micro-channel substrate layer, and a micro heat dissipation channel is formed between every two adjacent fins. According to the invention, the problem that the infrared imaging camera cannot work for a long time in a high-dose radiation environment around the target body is solved; the neutron generation target is cooled by using a micro heat dissipation channel structure, so that the shape of a proton beam spot can be predicted, and the temperature of the target material can be monitored; the uniformly distributed thermocouples are adopted, and the distances from the thermocouples to the surface of the target material are consistent, so that a uniformly measured temperature field is formed, and beam spot shape prediction is facilitated.

Description

technical field [0001] The invention relates to the technical field of generating accelerator-driven targets, in particular to an accelerator-driven high-power neutron generation target with functions of efficient cooling, temperature and beam spot monitoring. Background technique [0002] When the particles or rays produced by the accelerator bombard the neutron production target, especially the low-energy protons, high unit heat flux and high thermal load power, such as the boron neutron capture therapy cancer device, which uses protons as incident particles, and the proton energy is at 2MeV Between ~10MeV, the proton beam power is as high as 30kW or more, and the range of protons in the metal is relatively short, and the heat flux exceeds 100kW / cm2. Due to the low range of protons, the beam measurement element irradiated by protons will be deposited in the beam measurement element and cause it to burn, so it is difficult to obtain a specific beam spot distribution; in add...

Claims

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Application Information

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IPC IPC(8): H05H6/00H05H3/06
CPCH05H6/00H05H3/06
Inventor 童剑飞欧阳华甫朱凌波张锐强赵崇光梁天骄
Owner CHINA SPALLATION NEUTRON SOURCE SCI CENT
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