A Linear hybrid kicker modulator for ETA-II
- Bechtel Nevada Corp., Las Vegas, NV (United States)
A new type of pulse modulator is being developed at Livermore that will rapidly split a high current electron beam into two halves, enabling each half to proceed along separate pathways. Each modulator will be capable of applying a {+-}10kV, 200A pulse onto a transmission line electrode structure with a rise time less than 10 ns, a pulse repetition frequency greater than 1 MHz, and a maximum pulse duration of 400 ns. The electrode structure, located inside the beam-transport pipe, generates an electromagnetic field that acts on part of the original beam to ``kick`` it in another direction. The true merit of this high-speed modulator will be its flexibility in pulse duration and shape. The electrodynamics involved in altering the beam`s trajectory require the modulator to generate a time-varying pulse that is precisely tailored in amplitude. Consequently, the modulator is driven by an arbitrary waveform generator and must act more as a linear amplifier than as a simple switch. The requirements of high peak power and wide analog bandwidth (about 50 MHz) will be addressed by merging a solid-state driver with an output stage of high-power vacuum tubes. Modulator development and performance data will be presented as will the issues of beam-induced voltage and transit-time isolation that are considered when driving a beam load.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Bechtel Nevada Corp., Las Vegas, NV (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 570523
- Report Number(s):
- UCRL-JC-127141; CONF-9706113-; ON: DE98051091
- Resource Relation:
- Conference: 11. IEEE international pulsed power conference, Baltimore, MD (United States), 29 Jun - 2 Jul 1997; Other Information: PBD: 29 Jun 1997
- Country of Publication:
- United States
- Language:
- English
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