| 摘要 |
In a method for measuring the level of liquid cryogen in a cryogen vessel, a current pulse is applied to a cryogen level probe includes an ignition current pulse part of sufficient magnitude to ensure that a resistive front propagates down the probe to below the liquid cryogen surface; a recovery current pulse part allowing that part of the superconducting wire below the surface of the liquid cryogen to return to a superconducting state; and a measurement current pulse part of sufficient magnitude and duration to allow an accurate measurement of the superconducting wire's resistance to be measured. |
