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    • 10. 发明授权
    • Superconductive magnet having shim coils and quench protection circuits
    • 具有垫片线圈和骤冷保护电路的超导磁体
    • US4689707A
    • 1987-08-25
    • US867161
    • 1986-05-27
    • Robert E. Schwall
    • Robert E. Schwall
    • H01F6/00H02H7/00H01F7/22
    • H01F6/006H02H7/001Y02E40/68Y10S505/85
    • A superconductive magnet has a main coil for creating a primary magnetic field and a plurality of shim coils for correcting aberrations in different gradients in the primary field. The shim coils are also connected in shunt with shim quench heaters and with superconductors which together with the shim coils form a plurality of persistent loops. A plurality of protective heaters are electrically connected to the main coil and are thermally connected to the superconductors. When quenching begins in the main coil, current is diverted through the protective heaters causing them to heat. This increases the temperature of the superconductors in the persistent loops causing them to switch from the superconductive to the resistive state and divert current into the shim quench heaters. These heaters in turn heat the shim coils and drive the shim coils resistive to safety dissipate any energy therein.
    • 超导磁体具有用于产生初级磁场的主线圈和用于校正主场中不同梯度的像差的多个匀场线圈。 垫片线圈还与垫片加热器和超导体分开连接,超导体与垫片线圈一起形成多个持续环路。 多个保护加热器电连接到主线圈并与超导体热连接。 当在主线圈中开始淬火时,电流通过保护加热器转向导致它们发热。 这增加了持续回路中超导体的温度,从而使它们从超导电流转变为电阻状态,并将电流转移到垫片淬火加热器中。 这些加热器又加热垫片线圈并驱动阻尼线圈以抵抗安全性,从而消散其中的任何能量。