Cryogen-free magnet system comprising a heat sink connected to the gas circuit of a cryocooler
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United States of America Patent
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May 19, 2020
Grant Date -
Feb 22, 2018
app pub date -
Aug 18, 2017
filing date -
Aug 18, 2016
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Abstract
A cryostat arrangement includes a superconducting magnet to be cooled by an active cryocooler. The cryocooler includes a coolant circuit with a compressor, a cold head, and a cold finger in thermal contact with the magnet. A volumetric vessel containing cryogenic fluid is thermally coupled to the magnet. The volumetric vessel is connected to the coolant circuit by a pressure-resistant line. A fluidic component influences the flow rate through the line in a defined manner such that the cryogenic fluid flows between the volumetric vessel and the coolant circuit with a time constant of at least 15 minutes. The cryostat can be operated in a “cryogen-free” manner and permits a sufficiently long time to quench in the event of operational malfunctions.
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