Stabilization enhancement for superconducting magnets by means of hydrostatically pressurized He II
✍ Scribed by H. Kobayashi; T. Tada; T. Kodama; M. Tanaka; H. Turuga
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 423 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0011-2275
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✦ Synopsis
He II under pressures from 1 atm to saturated vapour pressure and constant bath temperature was investigated as a possible coolant for superconducting magnets. The cooling strength is described in terms of a critical frequency fc at which the peak transport currents corresponding to successive constant voltage pulses decrease abruptly due to a breakdown of superfluidity. Maximum fc was found at 2 pressures (He I la) i.e., with a hydrostatic pressure head of about 2 m. This allows the use of ordinary cryostats while retaining the efficiency of saturated He II systems. He I1~ does not give full stabilization in the classical sense, but is a promising coolant for pulse magnets or metastabilized d.c. magnets.