Apparatus and method for the rapid discharge of a superconducting magnet coil
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United States of America Patent
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Dec 8, 1998
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app pub date -
May 22, 1997
filing date -
Nov 22, 1994
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Abstract
A device for the safe discharge of a superconducting magnet coil (4) which is located inside a cryostat (2) and superconductively short-circuited by a superconducting switch (7) providing at or in the cryostat (2) a transmitter (10) of electromagnetic energy being located at a temperature level considerably above the cryogenic temperature of the superconducting magnet coil (4), which transmitter can be switched on quickly from outside, and by arranging in the region of the superconducting switch (7) at the cryogenic temperature level of the superconducting magnet coil (4) a receiver (20) for the emitted electromagnetic energy, which transmits the received energy directly or indirectly to a heating device (15) of the superconducting switch (7) or which activates an auxiliary energy source (41) in the region of the superconducting switch (7) , which on its turn effects a heating of the superconducting switch (7), so that it becomes normal-conducting and causes a discharge process of the superconducting magnet coil (4) via resistors (18) and/or diodes (19), being located at the cryogenic temperature level, there being no electrically conducting connection between transmitter (10; 10') and receiver (20). In this way, the magnet can be discharged without contact.
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