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Title: NSTX tangential divertor camera

Abstract

Strong magnetic field shear around the divertor x-point is numerically predicted to lead to strong spatial asymmetries in turbulence driven particle fluxes. To visualize the turbulence and associated impurity line emission near the lower x-point region, a new tangential observation port has been recently installed on NSTX. A reentrant sapphire window with a moveable in-vessel mirror images the divertor region from the center stack out to R{approx}80 cm and views the x-point for most plasma configurations. A coherent fiber optic bundle transmits the image through a remotely selected filter to a fast camera, for example, a 40 500 frames/s photron complementary metal-oxide-semiconductor camera. A gas puffer located in the lower inboard divertor will localize the turbulence in the region near the x-point. Edge fluid and turbulent codes UEDGE and BOUT will be used to interpret impurity and deuterium emission fluctuation measurements in the divertor.

Authors:
; ; ; ; ;  [1]
  1. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
Publication Date:
OSTI Identifier:
20641270
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 75; Journal Issue: 10; Conference: 15. topical conference on high temperature plasma diagnostics, San Diego, CA (United States), 19-22 Apr 2004; Other Information: DOI: 10.1063/1.1789609; (c) 2004 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; ASYMMETRY; BOUNDARY LAYERS; CAMERAS; DEUTERIUM; DIVERTORS; FLUCTUATIONS; IMAGES; MAGNETIC FIELDS; NSTX DEVICE; PLASMA DIAGNOSTICS; PLASMA IMPURITIES; SAPPHIRE; SEMICONDUCTOR MATERIALS; TURBULENCE

Citation Formats

Roquemore, A L, Biewer, Ted, Johnson, D, Zweben, S J, Nishino, Nobuhiro, Soukhanovskii, V A, Hiroshima University, Hiroshima, and Lawrence Livermore National Laboratory, Livermore, California 94550. NSTX tangential divertor camera. United States: N. p., 2004. Web. doi:10.1063/1.1789609.
Roquemore, A L, Biewer, Ted, Johnson, D, Zweben, S J, Nishino, Nobuhiro, Soukhanovskii, V A, Hiroshima University, Hiroshima, & Lawrence Livermore National Laboratory, Livermore, California 94550. NSTX tangential divertor camera. United States. doi:10.1063/1.1789609.
Roquemore, A L, Biewer, Ted, Johnson, D, Zweben, S J, Nishino, Nobuhiro, Soukhanovskii, V A, Hiroshima University, Hiroshima, and Lawrence Livermore National Laboratory, Livermore, California 94550. Fri . "NSTX tangential divertor camera". United States. doi:10.1063/1.1789609.
@article{osti_20641270,
title = {NSTX tangential divertor camera},
author = {Roquemore, A L and Biewer, Ted and Johnson, D and Zweben, S J and Nishino, Nobuhiro and Soukhanovskii, V A and Hiroshima University, Hiroshima and Lawrence Livermore National Laboratory, Livermore, California 94550},
abstractNote = {Strong magnetic field shear around the divertor x-point is numerically predicted to lead to strong spatial asymmetries in turbulence driven particle fluxes. To visualize the turbulence and associated impurity line emission near the lower x-point region, a new tangential observation port has been recently installed on NSTX. A reentrant sapphire window with a moveable in-vessel mirror images the divertor region from the center stack out to R{approx}80 cm and views the x-point for most plasma configurations. A coherent fiber optic bundle transmits the image through a remotely selected filter to a fast camera, for example, a 40 500 frames/s photron complementary metal-oxide-semiconductor camera. A gas puffer located in the lower inboard divertor will localize the turbulence in the region near the x-point. Edge fluid and turbulent codes UEDGE and BOUT will be used to interpret impurity and deuterium emission fluctuation measurements in the divertor.},
doi = {10.1063/1.1789609},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 10,
volume = 75,
place = {United States},
year = {2004},
month = {10}
}