Study of MARX circuit power charge and control system for ILC

A high power and long pulse power supply for the International Linear Collider(ILC) is being developed. The target specifications are -120kV(±0.5%), 140A, 1.7ms, and 5pps, with special consideration on compactness, reliability and cost control. A chopper MARX circuit with independent phase control has been developed by using new semiconductor devices. The technology for constant voltage control MARX circuit has been proposed. Furthermore, there is a proposed plan for charging the MARX units in parallel. For the target -120kV, 20 MARX units, each is capable of generating the output of -6.4kV, are superimposed. Each unit is composed of four-stage MARX cells of -1.6kV each. Important technical problems include ripple reduction and loss reduction during charging. This paper shows an 80 stage MARX circuit optimization design for the charging circuit and overall structure of MARX for ILC. (author)