NDLI: Investigation of UV LEDs for compact back-lighted thyratron triggering

Content Provider	IEEE Xplore Digital Library
Author	Sozer, E.B. Chunqi Jiang Gundersen, M.A.
Copyright Year	2009
Description	Author affiliation: Ming Hshieh Department of Electrical Engineering- Electrophysics, University of Southern California, Los Angeles, 90089 USA (Sozer, E.B.; Chunqi Jiang; Gundersen, M.A.)
Abstract	The back-lighted thyratron (BLT), an optically-triggered pseudospark switch, employs high energy (e.g. UV) photons to produce photoelectrons and initiate the breakdown a low-pressure high-power glow discharge. Characteristics of these switches are high-voltage hold-off (≫30 kV), high peak current capability, excellent current rise rate (up to $10^{12}$ A/s) and a simple device geometry [1]. It is of interest to develop ultra-compact BLTs [2] with reliable and practical optical triggering systems for applications in compact pulsed power. Recent remarkable advances in ultraviolet (UV) light emitting diodes (LEDs) [3] have potentially enabled new optical trigger schemes for compact BLTs: replace expensive trigger light sources such as lasers or UV flash lamps, and thereby substantially simplify the light-triggered BLT systems, significantly reducing the total switch cost and the BLT system volume. In this work, potential utilization of UV LEDs for BLT triggering is discussed. The photoelectron yields are measured for metal photocathodes illuminated by a 266 nm UV Laser with 5 ns duration and at a pressure range typical for BLT operation. The number of photoelectrons needed to generate an avalanche in a switch and initiate breakdown is extrapolated from a BLT-based, electron-beam current measurement.
Starting Page	610
Ending Page	612
File Size	812256
Page Count	3
File Format	PDF
ISBN	9781424440641
DOI	10.1109/PPC.2009.5386349
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Light emitting diodes Thyratrons Optical switches Power system reliability Stimulated emission Electric breakdown Glow discharges Geometrical optics Optical pulses Light sources
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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