DEVELOPMENT OF DC POWER-SUPPLY FOR GYROTRON WITH ENERGY RECOVERY-SYSTEM

A new type of power supply system for a gyrotron with collector potent ial depression (CPD) to enhance gyrotron efficiency was developed. The power supply system is composed of a main power supply (MPS) and an a cceleration power supply (APS). The APS which provides the stable high held to the magnetron injection gun (MIG) of the gyrotron is the key point of the system. The DC-DC converter technique is applied to the A PS and it can output 100 kV of maximum voltage within +/- 0.5% stabili ty and 300 mA of maximum current. The CPD gyrotron operation was succe ssfully achieved with an efficiency of 48% and power of 350 kW for 5 s at 110 GHz. The stable gyrotron operation, without regulation of MPS, which provides the d.c. input power to the gyrotron, has been demonst rated by the combination of the APS and MPS. (C) 1997 Elsevier Science S.A.