Your browser doesn't support javascript.
loading
Initial results of the high resolution edge Thomson scattering upgrade at DIII-D.
Eldon, D; Bray, B D; Deterly, T M; Liu, C; Watkins, M; Groebner, R J; Leonard, A W; Osborne, T H; Snyder, P B; Boivin, R L; Tynan, G R.
Afiliación
  • Eldon D; University of California San Diego, La Jolla, California 92093-0354, USA. eldond@fusion.gat.com
Rev Sci Instrum ; 83(10): 10E343, 2012 Oct.
Article en En | MEDLINE | ID: mdl-23127000
ABSTRACT
Validation of models of pedestal structure is an important part of predicting pedestal height and performance in future tokamaks. The Thomson scattering diagnostic at DIII-D has been upgraded in support of validating these models. Spatial and temporal resolution, as well as signal to noise ratio, have all been specifically enhanced in the pedestal region. This region is now diagnosed by 20 view-chords with a spacing of 6 mm and a scattering length of just under 5 mm sampled at a nominal rate of 250 Hz. When mapped to the outboard midplane, this corresponds to ~3 mm spacing. These measurements are being used to test critical gradient models, in which pedestal gradients increase in time until a threshold is reached. This paper will describe the specifications of the upgrade and present initial results of the system.

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Rev Sci Instrum Año: 2012 Tipo del documento: Article País de afiliación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Rev Sci Instrum Año: 2012 Tipo del documento: Article País de afiliación: Estados Unidos