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Title: Photon counting technique applied to time-resolved laser-induced fluorescence measurements on a stabilized discharge

A novel approach to perform time-resolved laser-induced fluorescence (LIF) measurements in plasma discharges is presented. The LIF technique relies on a photon counting method associated with a sinusoidal potential modulation on a floating electrode located in the plasma to ensure time coherence. By tuning the modulation frequency, resonance can be reached with the discharge current in order to guarantee repeatable measurement conditions. Time-averaged characteristics of the discharge (such as T{sub e}, n{sub e}, V{sub p}, and V{sub ion}) remain unaffected by the modulation. As an example, the association of the photon counting method with the modulation system is employed to determine the time evolution of several ion velocity groups inside an E × B discharge. Interesting features of the velocity oscillations are examined and pave the way for more focused studies.
Authors:
; ;  [1]
  1. ICARE Laboratory - CNRS, 1C Av. de la Recherche Scientifique, Orleans (France)
Publication Date:
OSTI Identifier:
22220554
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 84; Journal Issue: 7; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; COUNTING TECHNIQUES; ELECTRIC DISCHARGES; ELECTRODES; FLUORESCENCE; LASERS; LITHIUM FLUORIDES; MODULATION; PHOTONS; PLASMA DIAGNOSTICS; TIME RESOLUTION