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Improved edge charge exchange recombination spectroscopy in DIII-D.
Chrystal, C; Burrell, K H; Grierson, B A; Haskey, S R; Groebner, R J; Kaplan, D H; Briesemeister, A.
Afiliación
  • Chrystal C; Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831, USA.
  • Burrell KH; General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA.
  • Grierson BA; Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451, USA.
  • Haskey SR; Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451, USA.
  • Groebner RJ; General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA.
  • Kaplan DH; General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA.
  • Briesemeister A; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
Rev Sci Instrum ; 87(11): 11E512, 2016 Nov.
Article en En | MEDLINE | ID: mdl-27910369
The charge exchange recombination spectroscopy diagnostic on the DIII-D tokamak has been upgraded with the addition of more high radial resolution view chords near the edge of the plasma (r/a > 0.8). The additional views are diagnosed with the same number of spectrometers by placing fiber optics side-by-side at the spectrometer entrance with a precise separation that avoids wavelength shifted crosstalk without the use of bandpass filters. The new views improve measurement of edge impurity parameters in steep gradient, H-mode plasmas with many different shapes. The number of edge view chords with 8 mm radial separation has increased from 16 to 38. New fused silica fibers have improved light throughput and clarify the observation of non-Gaussian spectra that suggest the ion distribution function can be non-Maxwellian in low collisionality plasmas.
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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Rev Sci Instrum Año: 2016 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Buscar en Google
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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Rev Sci Instrum Año: 2016 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos