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Spectroscopic diagnostics for ablation cloud of tracer-encapsulated solid pellet in LHD.
MedLine Citation:
PMID:  19044683     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
In the Large Helical Device (LHD), various spectroscopic diagnostics have been applied to study the ablation process of an advanced impurity pellet, tracer-encapsulated solid pellet (TESPEL). The total light emission from the ablation cloud of TESPEL is measured by photomultipliers equipped with individual interference filters, which provide information about the TESPEL penetration depth. The spectra emitted from the TESPEL ablation cloud are measured with a 250 mm Czerny-Turner spectrometer equipped with an intensified charge coupled device detector, which is operated in the fast kinetic mode. This diagnostic allows us to evaluate the temporal evolution of the electron density in the TESPEL ablation cloud. In order to gain information about the spatial distribution of the cloud parameters, a nine image optical system that can simultaneously acquire nine images of the TESPEL ablation cloud has recently been developed. Several images of the TESPEL ablation cloud in different spectral domains will give us the spatial distribution of the TESPEL cloud density and temperature.
Authors:
N Tamura; V Yu Sergeev; D V Kalinina; I V Miroshnikov; K Sato; I A Sharov; O A Bakhareva; D M Ivanova; V M Timokhin; S Sudo; B V Kuteev
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Review of scientific instruments     Volume:  79     ISSN:  1089-7623     ISO Abbreviation:  Rev Sci Instrum     Publication Date:  2008 Oct 
Date Detail:
Created Date:  2008-12-02     Completed Date:  2009-02-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0405571     Medline TA:  Rev Sci Instrum     Country:  United States    
Other Details:
Languages:  eng     Pagination:  10F541     Citation Subset:  -    
Affiliation:
National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-City, Gifu 509-5292, Japan.
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