Abstract
Domestic test of the Japanese LCT coil was carried out in Japan Atomic Energy Research Institute (JAERI). Mechanical characteristics of the test coil were measured during the cool-down, warm-up and charge-up test by strain gauges and displacement gauges attached directly to the test coil.
During the cool-down test, the maximum temperature difference in the test coil was controlled within 96K in order to avoid excessive thermal strain. Maximum thermal strain in conductor and helium vessel in the circumferential direction was 170ppm, and-950ppm in cool-down test.
The test coil was able to charge up to the rated current in very stable, and run-away of strain was not observed both in conductor and in helium vessel. The test results obtained in rated current operation were compared with the calculation. Some differences in the distribution of conductor strain were found by the comparison, and several technical subjects both in measurement and in calculation became clear.
As the result of the domestic test, mechanical data base for large coil design was accumulated.
