Title:
SUPERCONDUCTING-CRITICAL-CURRENT MEASURING APPARATUS
Document Type and Number:
Japanese Patent JP3180856
Kind Code:
B2
Abstract:
PURPOSE: To obtain a superconducting-critical-current measuring apparatus wherein, when the critical current of a superconductor at a very low temperature is measured, the critical current can be measured with good efficiency by eliminating troublesome problems in handling liquefied gas.
CONSTITUTION: A test piece which is made of a superconductor and current leads 7 which are made of an oxide superconductor are connected thermally, via a highly heat-conductive and goodinsulator ceramic, to a metal cooling stage for a GM refrigerator 1 which has been sealed hermetically with a vacuum container 4 and a heat-radiant shield plate 5 or for other general refrigerators. Alternatively, a cooling stage itself is constituted of a ceramic, and it is used as a thermal anchor.
Inventors:
Hasebe
Application Number:
JP5792693A
Publication Date:
June 25, 2001
Filing Date:
February 23, 1993
Export Citation:
Assignee:
Sumitomo Heavy Industries Ltd.
International Classes:
F25B9/00; G01R19/00; G01R31/00; (IPC1-7): G01R31/00
Domestic Patent References:
| JP4258103A | ||||
| JP5786062A | ||||
| JP2256206A | ||||
| JP150483A | ||||
| JP4298246A | ||||
| JP4107805A |
Attorney, Agent or Firm:
Masao Toyoda