skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: High spatial and temporal resolution visible spectroscopy of the plasma edge in DIII-D

Abstract

In DIII-D, visible spectroscopic measurements of the He II 468.6 nm and C VI 529.2 nm Doppler broadened spectral lines, resulting from charge exchange recombination interactions between beam neutral atoms and plasma ions, are performed to determine ion temperatures, and toroidal and poloidal rotation velocities. The diagnostics system comprises 32 viewing chords spanning a typical minor radius of 63 cm across the midplane, of which 16 spatial chords span 11 cm of the plasma edge just within the separatrix. A temporal resolution of 260 {mu}s per time slice can be obtained as a result of using MCP phosphors with short decay times and fast camera readout electronics. Results from this system will be used in radial electric field comparisons with theory at the L--H transition and ion transport analysis.

Authors:
; ; ;  [1]
  1. General Atomics, San Diego, California 92186-9084 (USA)
Publication Date:
OSTI Identifier:
6135075
DOE Contract Number:  
AC03-89ER51114
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments; (USA)
Additional Journal Information:
Journal Volume: 61:10; Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DOUBLET-3 DEVICE; PLASMA DIAGNOSTICS; OPTICAL SPECTROMETERS; ATOMIC BEAMS; DOPPLER EFFECT; ELECTRON MULTIPLIER DETECTORS; ION TEMPERATURE; ION-ATOM COLLISIONS; MICROCHANNEL ELECTRON MULTIPLIERS; PHOSPHORS; RESOLUTION; ATOM COLLISIONS; BEAMS; CLOSED PLASMA DEVICES; COLLISIONS; ELECTRON MULTIPLIERS; ELECTRON TUBES; ION COLLISIONS; MEASURING INSTRUMENTS; RADIATION DETECTORS; SPECTROMETERS; THERMONUCLEAR DEVICES; TOKAMAK DEVICES; 700102* - Fusion Energy- Plasma Research- Diagnostics

Citation Formats

Gohil, P, Burrell, K H, Groebner, R J, and Seraydarian, R P. High spatial and temporal resolution visible spectroscopy of the plasma edge in DIII-D. United States: N. p., 1990. Web. doi:10.1063/1.1141786.
Gohil, P, Burrell, K H, Groebner, R J, & Seraydarian, R P. High spatial and temporal resolution visible spectroscopy of the plasma edge in DIII-D. United States. https://doi.org/10.1063/1.1141786
Gohil, P, Burrell, K H, Groebner, R J, and Seraydarian, R P. 1990. "High spatial and temporal resolution visible spectroscopy of the plasma edge in DIII-D". United States. https://doi.org/10.1063/1.1141786.
@article{osti_6135075,
title = {High spatial and temporal resolution visible spectroscopy of the plasma edge in DIII-D},
author = {Gohil, P and Burrell, K H and Groebner, R J and Seraydarian, R P},
abstractNote = {In DIII-D, visible spectroscopic measurements of the He II 468.6 nm and C VI 529.2 nm Doppler broadened spectral lines, resulting from charge exchange recombination interactions between beam neutral atoms and plasma ions, are performed to determine ion temperatures, and toroidal and poloidal rotation velocities. The diagnostics system comprises 32 viewing chords spanning a typical minor radius of 63 cm across the midplane, of which 16 spatial chords span 11 cm of the plasma edge just within the separatrix. A temporal resolution of 260 {mu}s per time slice can be obtained as a result of using MCP phosphors with short decay times and fast camera readout electronics. Results from this system will be used in radial electric field comparisons with theory at the L--H transition and ion transport analysis.},
doi = {10.1063/1.1141786},
url = {https://www.osti.gov/biblio/6135075}, journal = {Review of Scientific Instruments; (USA)},
issn = {0034-6748},
number = ,
volume = 61:10,
place = {United States},
year = {Mon Oct 01 00:00:00 EDT 1990},
month = {Mon Oct 01 00:00:00 EDT 1990}
}