10-MHz High-Voltage Modulator with Pulse-Width and Repetition-Rate Agility

摘要

Requirements for control and rapid switching of the proton beam at the Los Alamos Meson Physics Facility (LAMPF) are continually revised to support accelerator upgrades and modifications. A recent upgrade required the development of a 10-MHz high-voltage modulator for an electrostatic kicker with real-time control of pulse width and repetition rate over a range of four decades. The modulator must be capable of producing a voltage pulse across a capacitive load with a rise time of less than or equal to 20 ns (10% to 90%). In addition the falling edge undershoot must be controlled to less than one part in 10 exp 3 . The paper describes in detail the circuit design philosophy, layout, and critical areas in system design. (ERA citation 10:039820)