高遠心力環境下で動作する超電導式ヘリウム液面計の制御電流

Abstract

Superconducting field windings of superconducting generators are cooled with liquid helium which forms a cylindrical surface in the rotating helium pool. It is important for superconducting generators to ensure the detection of the liquid level to prevent an accidental transition of superconducting field windings into the normal state. Superconductive helium level detectors are used to measure the helium level in the rotating helium pool. It is important in general for superconductine helium level detectors to select a suitable control current. So we tried to investigate the suitable control current experimentally using a rotating cryostat. As a result we found that the control current of superconductive helium level detectors should be about two times bigger under circumstances of high centrifugal acceleration than that which is usually selected under circumstances of 1G.