Cooling method for superconducting magnet of superconducting circular accelerator

A cyclotron and superconducting magnet technology, which is applied to superconducting magnets/coils, magnetic objects, electrical components, etc., can solve the problems of long cooling time and complicated cooling process, and achieve short cooling time, reasonable cooling steps and convenient operation Effect

Inactive Publication Date: 2017-12-15
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of the existing superconducting magnet cooling method in my country, such as complex cooling process and long cooling time, the present invention provides a cooling method for superconducting cyclotron superconducting magnet

Method used

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Embodiment

[0022] The cooling method of superconducting cyclotron superconducting magnet of the present invention, a kind of preferred embodiment thereof is as follows:

[0023] (1) Connect the vacuum pumping port of the superconducting magnet with the molecular pump unit with bellows. Two molecular pump units are used in total, and are connected to the two vacuum pumping ports of the superconducting magnet with two bellows. Turn on the molecular pump unit to evacuate the interior of the superconducting magnet and monitor the vacuum degree. When the vacuum degree is lower than 1×10 -2 Vacuuming is completed at Pa. Vacuum leak detection for superconducting magnets requires a leak rate of less than 1×10 -10 PaL / s.

[0024] (2) Connect the superconducting magnet and the liquid nitrogen tank with a liquid nitrogen infusion tube, fix one end of the liquid nitrogen infusion tube to the liquid nitrogen tank, and insert the other end of the liquid nitrogen infusion tube into the infusion port ...

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PUM

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Abstract

The invention belongs to the field of superconducting circular accelerators, and provides a cooling method for a superconducting magnet of a superconducting circular accelerator in order to solve the problems that in China, the existing cooling methods for superconducting magnets are complex in procedure and large in time consumption for cooling and the like. The cooling method includes the steps of (1) vacuumizing the superconducting magnet; (2) conducting liquid nitrogen refrigeration on the superconducting magnet, and meanwhile adjusting length of a pulling rod of the superconducting magnet in a radial direction; (3) exhausting liquid nitrogen and vacuumizing the superconducting magnet; (4) conducting liquid helium refrigeration on the superconducting magnet to complete cooling. The cooling method for the superconducting magnet of the superconducting circular accelerator adopts a two-segment cooling mode including a liquid nitrogen cooling process and a liquid helium cooling process; the cooling procedures are designed reasonably, the cooling time is short, the operation is convenient, and the cooling method can effectively reduce consumption amount of the liquid nitrogen and the liquid helium on the premise of meeting the cooling demands for superconducting coils.

Description

technical field [0001] The invention belongs to the field of superconducting cyclotrons, in particular to a cooling method for a superconducting magnet of a superconducting cyclotron. Background technique [0002] A cyclotron is a particle accelerator, which uses the combined action of a magnetic field and an electric field to cause charged particles to perform cyclotron motion, and a device that repeatedly accelerates the cyclotron-moving charged particles with a high-frequency electric field. Among them, the superconducting cyclotron is the core equipment of the current medical proton therapy accelerator. [0003] Medical proton therapy accelerator is the most cutting-edge radiation therapy equipment in the world today. It can treat tumors with microscopic proton and heavy ion radiation. It has remarkable curative effect, good development prospects and huge commercial value. At present, only a few developed countries have mastered and applied it. This technology; while ou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F6/04
CPCH01F6/04
Inventor 尹蒙王川张素平
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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