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Title: Spectrographic temperature measurement of a high power breakdown arc in a high pressure gas switch

Abstract

A procedure for obtaining an approximate temperature value of conducting plasma generated during self-break closure of a RIMFIRE gas switch is described. The plasma is in the form of a breakdown arc which conducts approximately 12 kJ of energy in 1 {mu}s. A spectrographic analysis of the trigger-section of the 6-MV RIMFIRE laser triggered gas switch used in Sandia National Laboratory's ''Z-Machine'' has been made. It is assumed that the breakdown plasma has sufficiently approached local thermodynamic equilibrium allowing a black-body temperature model to be applied. This model allows the plasma temperature and radiated power to be approximated. The gas dielectric used in these tests was pressurized SF{sub 6}. The electrode gap is set at 4.59 cm for each test. The electrode material is stainless steel and insulator material is poly(methyl methacrylate). A spectrum range from 220 to 550 nanometers has been observed and calibrated using two spectral irradiance lamps and three spectrograph gratings. The approximate plasma temperature is reported.

Authors:
;  [1]
  1. Department of Computer and Electrical Engineering, Center for Physical and Power Electronics, University of Missouri--Columbia, Columbia, Missouri 65211 (United States)
Publication Date:
OSTI Identifier:
22063709
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 82; Journal Issue: 9; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; APPROXIMATIONS; BLACKBODY RADIATION; BREAKDOWN; DIELECTRIC MATERIALS; ELECTRIC ARCS; ELECTRODES; ELECTRON TEMPERATURE; ION TEMPERATURE; LASERS; LIGHT BULBS; LTE; METHACRYLIC ACID ESTERS; PLASMA; PRESSURE RANGE MEGA PA 10-100; RADIANT FLUX DENSITY; SANDIA NATIONAL LABORATORIES; SPECTROSCOPY; STAINLESS STEELS; SULFUR FLUORIDES; TEMPERATURE MEASUREMENT

Citation Formats

Yeckel, Christopher, and Curry, Randy. Spectrographic temperature measurement of a high power breakdown arc in a high pressure gas switch. United States: N. p., 2011. Web. doi:10.1063/1.3641880.
Yeckel, Christopher, & Curry, Randy. Spectrographic temperature measurement of a high power breakdown arc in a high pressure gas switch. United States. doi:10.1063/1.3641880.
Yeckel, Christopher, and Curry, Randy. Thu . "Spectrographic temperature measurement of a high power breakdown arc in a high pressure gas switch". United States. doi:10.1063/1.3641880.
@article{osti_22063709,
title = {Spectrographic temperature measurement of a high power breakdown arc in a high pressure gas switch},
author = {Yeckel, Christopher and Curry, Randy},
abstractNote = {A procedure for obtaining an approximate temperature value of conducting plasma generated during self-break closure of a RIMFIRE gas switch is described. The plasma is in the form of a breakdown arc which conducts approximately 12 kJ of energy in 1 {mu}s. A spectrographic analysis of the trigger-section of the 6-MV RIMFIRE laser triggered gas switch used in Sandia National Laboratory's ''Z-Machine'' has been made. It is assumed that the breakdown plasma has sufficiently approached local thermodynamic equilibrium allowing a black-body temperature model to be applied. This model allows the plasma temperature and radiated power to be approximated. The gas dielectric used in these tests was pressurized SF{sub 6}. The electrode gap is set at 4.59 cm for each test. The electrode material is stainless steel and insulator material is poly(methyl methacrylate). A spectrum range from 220 to 550 nanometers has been observed and calibrated using two spectral irradiance lamps and three spectrograph gratings. The approximate plasma temperature is reported.},
doi = {10.1063/1.3641880},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 9,
volume = 82,
place = {United States},
year = {2011},
month = {9}
}