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Title: Time-synchronized continuous wave laser-induced fluorescence on an oscillatory xenon discharge

Abstract

A novel approach to time-synchronizing laser-induced fluorescence measurements to an oscillating current in a 60 Hz xenon discharge lamp using a continuous wave laser is presented. A sample-hold circuit is implemented to separate out signals at different phases along a current cycle, and is followed by a lock-in amplifier to pull out the resulting time-synchronized fluorescence trace from the large background signal. The time evolution of lower state population is derived from the changes in intensity of the fluorescence excitation line shape resulting from laser-induced fluorescence measurements of the 6s{sup Prime }[1/2]{sub 1}{sup 0}-6p{sup Prime }[3/2]{sub 2} xenon atomic transition at {lambda}= 834.68 nm. Results show that the lower state population oscillates at twice the frequency of the discharge current, 120 Hz.

Authors:
;  [1];  [2]
  1. Stanford Plasma Physics Laboratory, Stanford University, Stanford, California 94305 (United States)
  2. Air Force Research Laboratory, Edwards AFB, California 93524 (United States)
Publication Date:
OSTI Identifier:
22093983
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 83; Journal Issue: 11; Other Information: (c) 2012 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:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ELECTRIC DISCHARGES; EXCITATION; FLUORESCENCE; LASER RADIATION; LOCK-IN AMPLIFIERS; PLASMA; PLASMA DIAGNOSTICS; PLASMA WAVES; XENON

Citation Formats

MacDonald, N. A., Cappelli, M. A., and Hargus, W. A. Jr. Time-synchronized continuous wave laser-induced fluorescence on an oscillatory xenon discharge. United States: N. p., 2012. Web. doi:10.1063/1.4766958.
MacDonald, N. A., Cappelli, M. A., & Hargus, W. A. Jr. Time-synchronized continuous wave laser-induced fluorescence on an oscillatory xenon discharge. United States. doi:10.1063/1.4766958.
MacDonald, N. A., Cappelli, M. A., and Hargus, W. A. Jr. Thu . "Time-synchronized continuous wave laser-induced fluorescence on an oscillatory xenon discharge". United States. doi:10.1063/1.4766958.
@article{osti_22093983,
title = {Time-synchronized continuous wave laser-induced fluorescence on an oscillatory xenon discharge},
author = {MacDonald, N. A. and Cappelli, M. A. and Hargus, W. A. Jr.},
abstractNote = {A novel approach to time-synchronizing laser-induced fluorescence measurements to an oscillating current in a 60 Hz xenon discharge lamp using a continuous wave laser is presented. A sample-hold circuit is implemented to separate out signals at different phases along a current cycle, and is followed by a lock-in amplifier to pull out the resulting time-synchronized fluorescence trace from the large background signal. The time evolution of lower state population is derived from the changes in intensity of the fluorescence excitation line shape resulting from laser-induced fluorescence measurements of the 6s{sup Prime }[1/2]{sub 1}{sup 0}-6p{sup Prime }[3/2]{sub 2} xenon atomic transition at {lambda}= 834.68 nm. Results show that the lower state population oscillates at twice the frequency of the discharge current, 120 Hz.},
doi = {10.1063/1.4766958},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 11,
volume = 83,
place = {United States},
year = {2012},
month = {11}
}