Quench protection tests of a cryocooler cooled 6 T NbTi superconducting magnet by an active power method

被引：2

作者：

Nanato, Nozomu ^{[1
]}

Inoue, Takahiro ^{[2
]}

Murase, Satoru ^{[1
]}

Nishijima, Gen ^{[3
]}

Tamakawa, Katsunori ^{[4
]}

Amaya, Munenori ^{[4
]}

Uemura, Yoshifumi ^{[4
]}

机构：

[1] Okayama Univ, Grad Sch Nat Sci & Technol, Div Ind Innovat Sci, Kita Ku, Okayama 7008530, Japan

[2] Okayama Univ, Grad Sch Nat Sci & Technol, Div Elect & Informat Syst Engn, Kita Ku, Okayama 7008530, Japan

[3] Tohoku Univ, Inst Mat Res, High Field Lab Superconducting Mat, Aoba Ku, Sendai, Miyagi 9008577, Japan

[4] Tamakawa Co Ltd, Taihaku Ku, Sendai, Miyagi 9820014, Japan

来源：

CRYOGENICS | 2012年 / 52卷 / 7-9期

关键词：

Active power method; Quench; Quench detection; Protection; Cryocooler cooled superconducting magnet; COILS;

D O I：

10.1016/j.cryogenics.2012.01.031

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

When a quench occurs in a superconducting magnet, excessive joule heating may damage the magnet. We have presented the quench protection system based on an active power method. Our previous quench protection tests have been carried out for small superconducting magnets whose self inductances are less than several hundred mH to verify principles of our proposed system. In this paper, we present experimental results of quench protection tests of a cryocooler cooled 61 NbTi superconducting magnet (self inductance 15.5 H), which is a commercial size magnet made by Tamakawa Co., Ltd. We confirmed that our proposed system could inhibit the maximum temperature of the superconducting magnet (initial temperature 4.3 K) after the quench to less than about 44 K at operation magnetic field 5.5 T. Experimental results suggest that our proposed system is useful for practical used superconducting magnets. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：321 / 324

页数：4

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