Design and operation of a fast-risetime, 500 Hz, 24 kV, optically-isolated pulse trigger generator

David H. Barnett, Jonathan Parson, Curtis Lynn, Patrick Kelly, Mark Taylor, James Dickens, Andreas Neuber, John Mankowski, Steve Calico, Michael Scott

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents the design and performance characteristics of an optically isolated, trigger generator for spark gap applications that is capable of operating at over 500 Hz rep rate. The pulsed trigger generator is designed to achieve fast risetimes on the order of 1kV/ns to cause breakdown between the trigatron trigger pin and the opposite electrode. The pulsed trigger generator is designed to trigger a 10-stage, 500 kV, 42 J Marx generator. The system is capable of delivering a 4-25 kV pulse with a 10/90 risetime of 20 ns. A board was fabricated to control a capacitor charger and high voltage thyristor via fiber optic inputs. The capacitor charger, a 60 W constant current dc-dc power supply with variable voltage control, is capable of charging 1 nF in less than 0.3 ms. The system is battery-powered using a 33 V lithium polymer battery pack for isolated operation in noisy environments. For burst mode operation, a larger 250 nF buffer capacitor, which is initially charged, is connected through a 100 k resistor to the trigger capacitor, which is varied between 1 and 40 nF. The value of the trigger capacitor is adjusted to provide optimum performance for a given transformer and magnetic switch. System modeling results along with experimental data are discussed including the reliability and performance of the overall system including jitter at 500 Hz operation.

Original languageEnglish
Title of host publicationProceedings of the 2014 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2014
EditorsAllen L. Garner
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages374-376
Number of pages3
ISBN (Electronic)9781467373234
DOIs
StatePublished - Oct 1 2015
EventIEEE International Power Modulator and High Voltage Conference, IPMHVC 2014 - Santa Fe, United States
Duration: Jun 1 2014Jun 5 2014

Publication series

NameProceedings of the 2014 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2014

Conference

ConferenceIEEE International Power Modulator and High Voltage Conference, IPMHVC 2014
CountryUnited States
CitySanta Fe
Period06/1/1406/5/14

Fingerprint Dive into the research topics of 'Design and operation of a fast-risetime, 500 Hz, 24 kV, optically-isolated pulse trigger generator'. Together they form a unique fingerprint.

Cite this