Precooling of a superconducting magnet using a cryocooler and thermal switches |
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| Authors: | Yamamoto J Yanai M |
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| Affiliation: | Osaka University, Low Temperature Center, Suita, Osaka 565, Japan. |
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| Abstract: | A simple precooling system for a superconducting magnet is developed using a Cryomech GB02 cryocooler and gas filled thermal switches. A superconducting magnet (NbTi wire, 7 T of maximum field, 5.6 kg of weight) is precooled to 16 K in about 70 h without any manual control. Heat transfer rate of each thermal switch (H2 or N2 gas filled at 1.3 MPa at room temperature) is about 3x10(-1) W/K during the ON state, and 5x10(-3) W/K during the OFF state. |
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