Details

Autor(en) / Beteiligte

• Cortázar, O. D.
• Ganuza, D.
• De La Fuente, J. M.
• Zulaika, M.
• Pérez, A.
• Anderson, D. E.

Titel

A 100 kV, 60 A solid state 4 kHz switching modulator for high power klystron driving

Ist Teil von

• Review of scientific instruments, 2013-05, Vol.84 (5), p.054706-054706

Ort / Verlag

United States

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A solid state high power modulator capable of delivering 120 kV and 60 A developed in collaboration with the JEMA Corporation, ESS Bilbao, and the SNS (ORNL) for driving high power klystrons is presented. Pulses with less than 10 μs risetime and flatness under 0.1% are obtained with programmable frequency pulses between 2 and 50 Hz. Eight solid state switches combined with custom air-insulated high voltage transformers working at a switching frequency of 4 kHz produce high quality pulses by phase shifting the transformer drives. Each relative high frequency stage pumps a double stage high voltage Marx generator that supplies the output pulse shape and frequency. This merged topology between a Marx generator and direct modulator takes advantage of the strengths of both approaches. Low energy storage in the output stages assures safe operation in case of a load arc discharge. Real time voltage correction during the pulse is also provided to compensate for the droop inherent with the use of low energy storage in the output stages. Data at full power with a dummy resistive load are presented.