Refrigeration – Storage of solidified or liquified gas – With measuring
Patent
1988-12-07
1989-10-10
Capossela, Ronald C.
Refrigeration
Storage of solidified or liquified gas
With measuring
62 501, 62 511, 174 154, 505885, 505899, F17C 1302
Patent
active
048723142
ABSTRACT:
In a superconducting coil refrigerating method and a superconducting apparatus, a flow of liquid helium is induced in a helium vessel only at a specified time upon change of a current of the superconducting coil, before the current change and/or after the current change. The induction of the helium flow before the current change provides a condition that the transfer of helium gas bubbles which may be generated upon subsequent current change is rapidly effected. The induction of the helium flow upon the current change or after the current change results in the rapid exhaustion of helium gas bubbles which continue to generate or have been generated. With such a construction, even if a superconducting pulse magnet is used, any influence of helium gas bubbles produced due to an AC loss upon change of a current can be eliminated, thereby providing a coil which is stable to a pulse-excited magnetization thereof.
REFERENCES:
patent: 3430450 (1969-03-01), Bogner et al.
patent: 3835239 (1974-09-01), Schmidt et al.
patent: 4744222 (1988-05-01), Murai
Asano Katuhiko
Suzuki Takao
Capossela Ronald C.
Hitachi , Ltd.
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