Title :
Test wire for high voltage power supply crowbar system
Author :
Bradley, J.T., III ; Collins, M. ; Gahl, J.M.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
fDate :
June 29 1997-July 2 1997
Abstract :
The klystron microwave amplifier tubes used in the low energy demonstration accelerator (LEDA) and to be used in the accelerator production of tritium (APT) plant have a strict upper limit on the amount of energy which can be safely dissipated within the klystron´s vacuum envelope during a high voltage arc. One way to prevent damage from occurring to the klystron microwave amplifier tube is through the use of a crowbar circuit which diverts the energy stored in the power supply filter capacitors from the tube arc. The crowbar circuit must be extremely reliable. To test the crowbar circuit, a wire that is designed to fuse when it absorbs a predetermined amount of energy is switched between the high voltage output terminals. The energy required to fuse the wire was investigated for a variety of circuits that simulated the power supply circuit. Techniques for calculating wire length and energy are presented along with verifying experimental data.
Keywords :
electric fuses; klystrons; microwave amplifiers; particle accelerators; power capacitors; power supplies to apparatus; pulse generators; pulsed power switches; HV pulsed power supply crowbar system; accelerator power supply circuit; accelerator production of tritium; crowbar circuit; damage prevention; high voltage arc; klystron microwave amplifier tubes; low energy demonstration accelerator; stored energy diversion; test wire fusing; vacuum envelope; Circuit testing; Electron tubes; Fuses; Klystrons; Microwave amplifiers; Power supplies; Production; System testing; Voltage; Wire;
Conference_Titel :
Pulsed Power Conference, 1997. Digest of Technical Papers. 1997 11th IEEE International
Conference_Location :
Baltimore, MA, USA
Print_ISBN :
0-7803-4213-5
DOI :
10.1109/PPC.1997.674655
