PERFORMANCE MEASUREMENTS OF SUPERCONDUCTING CURRENT LEADS WITH LOW HELIUM BOIL-OFF RATES

被引：9

作者：

Niemann, R. C. ^{[1
]}

Cha, Y. S. ^{[1
]}

Hull, J. R. ^{[1
]}

机构：

[1] Argonne Natl Lab, Div Mat & Components Technol, Bldg 335,9700 South Cass Ave, Argonne, IL 60439 USA

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1993年 / 3卷 / 01期

关键词：

D O I：

10.1109/77.233727

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A performance-measurement facility for current leads has been developed as a part of Argonne National Laboratory's program to develop applications for high-temperature superconductors. The facility measures the rate of helium vapor boil-off due to current-lead heat input to liquid helium and the pressure drop across a current lead for a pair of leads operating at currents up to 100 A. The facility's major components are a liquid-helium dewar with low background-heat input; a dewar insert that incorporates the current leads and associated instrumentation or connections for flow, pressure, level, temperature and voltage measurements; and a computer driven data-acquisition system. Background heat input is low enough so that boil-off rates one-tenth that of an optimized conventional lead can be characterized. The facility has been operated with conventional (i.e., vapor-cooled copper) leads, and with leads incorporating high-temperature superconductors at their cold ends. Details of the facility design, construction, and operating experience are presented.

引用

页码：392 / 395

页数：4

共 5 条

[1]

Cha Y. S., CRYOGENICS IN PRESS

[2] HIGH-TEMPERATURE SUPERCONDUCTING CURRENT LEADS FOR CRYOGENIC APPARATUS [J].