STABILITY AND PROTECTION OF AG/BSCCO MAGNETS OPERATED IN THE 20-40-K RANGE

被引：43

作者：

DRESNER, L

机构：

[1] Oak Ridge National Laboratory, Oak Ridge, TN 37831-8040

来源：

CRYOGENICS | 1993年 / 33卷 / 09期

关键词：

SUPERCONDUCTING MAGNETS; MAGNETIC STABILITY; AG/BSCCO COMPOSITES;

D O I：

10.1016/0011-2275(93)90104-V

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The rate of growth of normal zones has been calculated for Ag/BSCCO composites operated in the 20-40 K range. Formulae are presented for the propagation velocity and for the normal zone voltage as a function of the hot spot temperature. These formulae take into account the strong temperature dependence of the specific heats of silver and BSCCO, as well as the temperature dependences of the thermal conductivity and resistivity of silver. In spite of very slow propagation (of the order of 1 cm s-1), normal zone voltages seem adequate to allow the detection of normal zones before the conductor overheats. Finally, a formula for estimating the minimum quench energy is proposed. Estimates based on this formula indicate that potted magnets wound with Ag/BSCCO conductors should not train.

引用

页码：900 / 909

页数：10

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