Quench protection device for superconducting magnet system and working method thereof

Abstract

The invention discloses a quench protection device for a superconducting magnet system. The quench protection device comprises a superconducting coil group, the superconducting coil group comprises two symmetrical superconducting coils, the two superconducting coils are all connected in parallel with protection diodes, the superconducting coils and the protection diodes are all connected to a power supply through conductive wires, the superconducting coil group is connected in parallel with a quench protection unit, a transfer switch is installed in a connecting loop of the superconducting coils, the protection diodes and the power supply, and the transfer switch is connected with an external resistor through conductive wires. The quench protection device controls the transfer switch to connect the superconducting coils with the external resistor when the superconducting coils are in the state of quench of superconductivity, thereby effectively and quickly achieving the quench protection for the superconducting coils. Meanwhile, the problem of superconducting coil damage caused by response delay of the quench protection unit is solved by means of a method using the superconductingcoils and the protection diodes connected in parallel, two protection modes are effectively combined, the probability of damage to superconducting excitation coils of a superconducting cyclotron in the state of quench of superconductivity is greatly reduced, and the quench protection device has good use and promotion value.

Description

technical field [0001] The invention belongs to the field of accelerator technology, and in particular relates to a protection device for a superconducting proton accelerator, more specifically a quench protection device for a superconducting magnet system and a working method thereof. Background technique [0002] One of the basic characteristics of a non-resistance superconductor in a superconducting state. A superconducting magnet operates in an ultra-low temperature environment. When the local superconductor in the superconducting coil carrying current changes to a normal state, this part of the conductor will have resistance, and the generation of resistance will Bring additional heat load to the whole system, this phenomenon is called superconducting magnet quench. If this local quench cannot be detected and stopped in time, it will easily lead to an avalanche expansion, which will bring serious thermal load to the entire cryogenic system, and even cause damage to the ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned technical problems, the object of the present invention is to provide a superconducting magnet system quench protection device and its working method. By installing a protection diode and a quench protection unit on the superconducting coil group, the superconducting Problems of Superconducting Exciting Coil Damaged During Quench in Cyclotron

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