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Quench Protection Design and Simulation of a 7 Tesla Superconducting Magnet

Identifieur interne : 000F14 ( Main/Exploration ); précédent : 000F13; suivant : 000F15

Quench Protection Design and Simulation of a 7 Tesla Superconducting Magnet

Auteurs : BEILEI GUO [République populaire de Chine] ; LIZHEN MA [République populaire de Chine] ; WEI WU [République populaire de Chine] ; QINGGAO YAO [République populaire de Chine] ; WENXUE HUANG [République populaire de Chine] ; XI WU [République populaire de Chine] ; YUAN HE [République populaire de Chine] ; SHAOFEI HAN [République populaire de Chine] ; PING YUAN [République populaire de Chine]

Source :

RBID : Pascal:10-0295075

Mots-clés :

Abstract

A 7 Tesla superconducting magnet with a clear warm bore of 156 mm in diameter has been developed for Lanzhou Penning Trap at the Institute of Modern Physics for high precision mass measurement. The magnet is comprised of 9 solenoid coils and operates in persistent mode with a total energy of 2.3 MJ. Due to the considerable amount of energy stored during persistent mode operation, the quench protection system is very important when designing and operating the magnet. A passive protection system based on a subdivided scheme is adopted to protect the superconducting magnet from damage caused by quenching. Cold diodes and resistors are put across the subdivision to reduce both the voltage and temperature hot spots. Computational simulations have been carried in Opera-quench. The designed quench protection circuit and the finite element method model for quench simulations are described; the time changing of temperature, voltage and current decay during the quench process is also analysed.


Affiliations:


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<div type="abstract" xml:lang="en">A 7 Tesla superconducting magnet with a clear warm bore of 156 mm in diameter has been developed for Lanzhou Penning Trap at the Institute of Modern Physics for high precision mass measurement. The magnet is comprised of 9 solenoid coils and operates in persistent mode with a total energy of 2.3 MJ. Due to the considerable amount of energy stored during persistent mode operation, the quench protection system is very important when designing and operating the magnet. A passive protection system based on a subdivided scheme is adopted to protect the superconducting magnet from damage caused by quenching. Cold diodes and resistors are put across the subdivision to reduce both the voltage and temperature hot spots. Computational simulations have been carried in Opera-quench. The designed quench protection circuit and the finite element method model for quench simulations are described; the time changing of temperature, voltage and current decay during the quench process is also analysed.</div>
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