A hybrid solid-state induction modulator with pulse transformer to drive SLAC klystrons

Author

de Lamare, J.E.

Author_Institution

Stanford Linear Accelerator Center, Menlo Park, CA, USA

fYear

2002

fDate

30 June-3 July 2002

Firstpage

386

Lastpage

389

Abstract

A solid state hybrid induction modulator has been built and tested which can replace the line type modulators currently in use to power SLAC klystrons. The modulator uses twenty-two IGBT modules to drive eleven single turn primary windings of a transformer in parallel. Passing a pipe through the center of the vertically stacked METGLAS cores forms the single turn secondary. One end of the secondary winding is tied to ground, while at the output an induced voltage of eleven times the primary charge voltage is produced. The modulator in turn powers a conventional SLAC high voltage transformer and klystron. The output voltage produced by the "short stack" modulator built at SLAC is 24 kV, with a current of 6000 A. Pulse widths of up to 3 μs, at 120 Hz can be produced. Design details, test data, and comparisons with the conventional line type modulators are presented.

Keywords

accelerator RF systems; klystrons; linear accelerators; metallic glasses; pulse transformers; pulsed power supplies; transformer windings; 120 Hz; 24 kV; 3 mus; 6000 A; IGBT modules; SLAC high voltage transformer; SLAC klystrons; Stanford Linear Accelerator Center; hybrid solid-state induction modulator; parallel transformer; primary charge voltage; pulse transformer; secondary winding; single turn primary windings; single turn secondary; vertically stacked METGLAS cores; Amorphous magnetic materials; Insulated gate bipolar transistors; Klystrons; Pulse modulation; Pulse transformers; Pulse width modulation; Solid state circuits; Testing; Transformer cores; Voltage transformers;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Conference Record of the Twenty-Fifth International

ISSN

1076-8467

Print_ISBN

0-7803-7540-8

Type

conf

DOI

10.1109/MODSYM.2002.1189496

Filename

1189496