A 250 MW 1 uS Repetitively Pulsed Transportable Modulator Systems

Abstract

BACKGROUND matched end of line reverse voltage clipper. The thyratron is an EEV CX1722 hollow anode glass envelope air cooled device, the reverse conducting feature of this device allows the output voltage on the rf source at the end of the current pulse to flow back into the pfn. The maximum fault discharge current is 4KA and the normal maximum current is 2KA. At a prf of lOOpps maximum the device is very adequately rated and long life can be anticipated. The EPC which inhibits the application of any recharging voltage until the thyratron has fully recovered is used so that latch up and/or fire through do not present problems to the system. The EEV trigger unit type MA2437A was used for thyratron triggering to ensure rapid firing with no .jitter and minimal timing delay. More importantly, in a The system was primarily required for evaluation an rf parallel application it results in virtually no device to source that was under development. To permit the equipment device variations in these parameters. The CX1722 has been to be deployed at alternative sites for evaluation it was frequently used in multiple parallel switch applications. decided to develop the system in a form suitable for As each thyratron has its own pfn this also significantly transportation. improves the sharing of the devices.