| 摘要 |
A preconditioning method for use in a superconducting switch system in a superconducting magnet circuit having a main superconducting switch 1, and an auxiliary superconducting switch 2 connected in parallel with the main switch 1 comprises opening the main switch 1 and determining whether the superconducting current flow persists by flowing through the auxiliary switch 2. If not, this step is continually repeated until the system is conditioned against quenching. This step is required during an initial magnet energisation procedure, in which the main and auxiliary switches 1, 2 are closed in order to cause the current to persist in the circuit 40 without further power input. If the main switch 1 subsequently quenches, the current will transfer to the auxiliary switch 2 through the resistive connecting parts. Subsequently, after the main switch 1 has been re-cooled and has recovered to the superconducting state, the voltage drop through the resistive connecting parts will drive the current back to the main switch 1. |
