High Voltage Pulser for 184-Inch Cyclotron Electric Deflector

Abstract

This paper describes a high voltage pulse generator developed to deflect the beam of the 184-inch cyclotron at Berkeley, California. The apparatus develops a deflecting potential of 200 kilovolts that rises from 10 percent to 90 percent of peak value in 0.1 microsecond. The unit employs two similar 100 kilovolt water cooled pulse transformers connected symmetrically about ground to the electric deflector bars. Water-cooled General Electric pulse capacitors are discharged through the two turn primary windings of the pulse transformers by triggering a battery of 16 paralleled Kuthe 5C22 hydrogen thyratrons. Output voltages are developed across the 17-turn secondary winding of the pulse transformer. The transformer is mounted in an oil-filled Lucite case that provides both insulation and compact design.