| 摘要 |
<p>A superconducting coil device includes a cryostat (24) formed by accommodating liquid helium, a superconducting coil (16) which is accommodated in the cryostat (24) along with liquid helium, a persistent current switch (14) for short-circuiting the ends of the superconducting coil (16), and a thyristor (32) connected to both ends of the persistent current switch (14). The gate electrode (34) of the thyristor (32) and the intermediate tap (36) of the superconducting coil (16) are connected via a resistor (38) and/or diode. To both ends of the persistent current switch (14) there are connected each of one end of leads (44) that are formed by superconducting wire, and on the other ends of lead wires there are provided terminals (22). In addition, at the exterior of the cryostat (24) there is provided a power supply (12) for charging and discharging the superconducting coil (16) by being connected selectively to those terminals (22).</p> |
