Electromagnet

Elevated and intermediate energy civil and medical linear accelerators necessitate robust microwave sources to deliver enhanced microwave power. Typically, a suitable klystron is chosen as the source of microwave power. The operation of a magnetron hinges on the presence of a specific external magnetic field, typically assuming one of two configurations.

(1) The deployment of a permanent magnet, steadfast in its magnetic influence, complements a corresponding magnetron designed to operate at a constant microwave power output. To adjust the microwave power of the input acceleration tube, a high-power distributor must be introduced into the microwave feeder, albeit at a considerable expense.

(2) An electromagnet assumes the role of magnetic field provision. This electromagnet possesses the capacity to adapt the magnetic field's strength by modulating the electromagnet's input current in accordance with the accelerator system's requirements. This configuration furnishes a streamlined microwave feeder, affording the magnetron the ability to operate precisely at the desired power level. This extension of high-voltage operational durations leads to substantial reductions in maintenance costs for users. Presently, domestically developed electromagnets of the second type are characterized by meticulous craftsmanship involving electromagnet core, magnetic shielding, skeleton, coil, and more. Stringent control over manufacturing precision ensures hermetic magnetron installation, adequate heat dissipation, microwave transmission, and other essential characteristics, thereby accomplishing the localization of high-energy medical linear accelerator electromagnets.