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Title: Imaging polychromator for density measurements of polystyrene pellet cloud on the Large Helical Device

Experimental data on spatial distributions of a pellet cloud electron density are necessary for the development of many applications of pellet injection, namely, plasma fuelling, discharge control, and plasma diagnostics. An improved approach of electron density measurements inside the cloud of a polystyrene pellet ablating in hot plasma of the large helical device is described. Density values of (1-30) × 10{sup 16} cm{sup −3} depending on the background plasma parameters and distance from the solid pellet were measured.
Authors:
; ;  [1] ; ;  [2] ;  [3]
  1. Saint-Petersburg State Polytechnical University, Saint-Petersburg (Russian Federation)
  2. National Institute for Fusion Science, Toki (Japan)
  3. Russian Scientific Centre Kurchatov Institute, Moscow (Russian Federation)
Publication Date:
OSTI Identifier:
22392457
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 86; Journal Issue: 4; Other Information: (c) 2015 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; EVALUATION; HOT PLASMA; LHD DEVICE; PLASMA DIAGNOSTICS; SPATIAL DISTRIBUTION