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Title: Local pellet based and line-integrated nonperturbing charge exchange measurements with a compact neutral particle analyzer on Large Helical Device

Abstract

Experiments on suprathermal ion physics are carried out on the Large Helical Device (LHD) with a 40 channel compact neutral particle analyzer (CNPA). The analyzer is used both in passive nonperturbing chord-integral neutral particle flux measurements and for local probing with an impurity pellet. The analyzer observes trapped particles with vertical bar v{sub parallel}/v vertical bar <0.25 and the pitch angle cosine value v{sub parallel}/v changes sign along the diagnostic sight line. The measurable energy range for H{sup 0} is 1-170 keV. Radially resolved data on local H{sup 0} atomic energy spectra have been obtained on LHD by the pellet charge exchange method with CNPA, as well as chord-integral atomic energy distribution data for electron cyclotron heated, neutral beam injected, and high power ion cyclotron heated plasma. The article addresses the diagnostic technical background and the analysis scheme of measurement results taking into account the helical geometry and the species and densities of the charge exchange targets.

Authors:
; ; ; ; ; ;  [1]
  1. National Institute for Fusion Science, Toki, Gifu 509-5292 (Japan)
Publication Date:
OSTI Identifier:
20861317
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 77; Journal Issue: 10; Other Information: DOI: 10.1063/1.2336472; (c) 2006 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:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CHARGE EXCHANGE; KEV RANGE; LHD DEVICE; NEUTRAL PARTICLE ANALYZERS; NEUTRAL PARTICLES; PLASMA; PLASMA BEAM INJECTION; PLASMA CONFINEMENT; PLASMA DENSITY; PLASMA DIAGNOSTICS; PLASMA HEATING; PLASMA IMPURITIES; RF SYSTEMS; STELLARATORS

Citation Formats

Goncharov, P R, Ozaki, T, Sudo, S, Tamura, N, Veshchev, E A, Sergeev, V Yu, Krasilnikov, A V, Graduate University for Advanced Studies, Hayama, Kanagawa 240-0193, St. Petersburg Polytechnical University, 195251 St. Petersburg, and Troitsk Institute for Innovation and Fusion Research, 142092 Troitsk. Local pellet based and line-integrated nonperturbing charge exchange measurements with a compact neutral particle analyzer on Large Helical Device. United States: N. p., 2006. Web. doi:10.1063/1.2336472.
Goncharov, P R, Ozaki, T, Sudo, S, Tamura, N, Veshchev, E A, Sergeev, V Yu, Krasilnikov, A V, Graduate University for Advanced Studies, Hayama, Kanagawa 240-0193, St. Petersburg Polytechnical University, 195251 St. Petersburg, & Troitsk Institute for Innovation and Fusion Research, 142092 Troitsk. Local pellet based and line-integrated nonperturbing charge exchange measurements with a compact neutral particle analyzer on Large Helical Device. United States. https://doi.org/10.1063/1.2336472
Goncharov, P R, Ozaki, T, Sudo, S, Tamura, N, Veshchev, E A, Sergeev, V Yu, Krasilnikov, A V, Graduate University for Advanced Studies, Hayama, Kanagawa 240-0193, St. Petersburg Polytechnical University, 195251 St. Petersburg, and Troitsk Institute for Innovation and Fusion Research, 142092 Troitsk. 2006. "Local pellet based and line-integrated nonperturbing charge exchange measurements with a compact neutral particle analyzer on Large Helical Device". United States. https://doi.org/10.1063/1.2336472.
@article{osti_20861317,
title = {Local pellet based and line-integrated nonperturbing charge exchange measurements with a compact neutral particle analyzer on Large Helical Device},
author = {Goncharov, P R and Ozaki, T and Sudo, S and Tamura, N and Veshchev, E A and Sergeev, V Yu and Krasilnikov, A V and Graduate University for Advanced Studies, Hayama, Kanagawa 240-0193 and St. Petersburg Polytechnical University, 195251 St. Petersburg and Troitsk Institute for Innovation and Fusion Research, 142092 Troitsk},
abstractNote = {Experiments on suprathermal ion physics are carried out on the Large Helical Device (LHD) with a 40 channel compact neutral particle analyzer (CNPA). The analyzer is used both in passive nonperturbing chord-integral neutral particle flux measurements and for local probing with an impurity pellet. The analyzer observes trapped particles with vertical bar v{sub parallel}/v vertical bar <0.25 and the pitch angle cosine value v{sub parallel}/v changes sign along the diagnostic sight line. The measurable energy range for H{sup 0} is 1-170 keV. Radially resolved data on local H{sup 0} atomic energy spectra have been obtained on LHD by the pellet charge exchange method with CNPA, as well as chord-integral atomic energy distribution data for electron cyclotron heated, neutral beam injected, and high power ion cyclotron heated plasma. The article addresses the diagnostic technical background and the analysis scheme of measurement results taking into account the helical geometry and the species and densities of the charge exchange targets.},
doi = {10.1063/1.2336472},
url = {https://www.osti.gov/biblio/20861317}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 10,
volume = 77,
place = {United States},
year = {Sun Oct 15 00:00:00 EDT 2006},
month = {Sun Oct 15 00:00:00 EDT 2006}
}