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Title: Divertor interferometer diagnostic for ITER

Abstract

In the harsh environment of the divertor region in ITER, plasmas spanning a huge density range from 10{sup 19} to 10{sup 22} m{sup -3} are anticipated making measurement of the electron density particularly challenging. For any reasonable wavelength choice, the total phase measured by a conventional two-color interferometer system is always >>2{pi} and therefore subject to fringe counting errors. This problem can be remedied by adding a polarimeter capability whereby the Cotton-Mouton effect is measured or by employing differential interferometry. Using either approach, the total phase is always <<2{pi}. The conceptual design of an interferometer system along with possible wavelength choices will be explored.

Authors:
; ;  [1]
  1. Electrical Engineering Department, University of California at Los Angeles, Los Angeles, California 90095 (United States)
Publication Date:
OSTI Identifier:
20861277
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 77; Journal Issue: 10; Other Information: DOI: 10.1063/1.2219345; (c) 2006 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; COLOR; DESIGN; DIVERTORS; ELECTRON DENSITY; ERRORS; INTERFEROMETERS; INTERFEROMETRY; ITER TOKAMAK; PLASMA; PLASMA CONFINEMENT; PLASMA DENSITY; PLASMA DIAGNOSTICS; POLARIMETERS; VISIBLE RADIATION; VOIGT EFFECT; WAVELENGTHS

Citation Formats

Brower, D L, Deng, B H, and Ding, W X. Divertor interferometer diagnostic for ITER. United States: N. p., 2006. Web. doi:10.1063/1.2219345.
Brower, D L, Deng, B H, & Ding, W X. Divertor interferometer diagnostic for ITER. United States. https://doi.org/10.1063/1.2219345
Brower, D L, Deng, B H, and Ding, W X. 2006. "Divertor interferometer diagnostic for ITER". United States. https://doi.org/10.1063/1.2219345.
@article{osti_20861277,
title = {Divertor interferometer diagnostic for ITER},
author = {Brower, D L and Deng, B H and Ding, W X},
abstractNote = {In the harsh environment of the divertor region in ITER, plasmas spanning a huge density range from 10{sup 19} to 10{sup 22} m{sup -3} are anticipated making measurement of the electron density particularly challenging. For any reasonable wavelength choice, the total phase measured by a conventional two-color interferometer system is always >>2{pi} and therefore subject to fringe counting errors. This problem can be remedied by adding a polarimeter capability whereby the Cotton-Mouton effect is measured or by employing differential interferometry. Using either approach, the total phase is always <<2{pi}. The conceptual design of an interferometer system along with possible wavelength choices will be explored.},
doi = {10.1063/1.2219345},
url = {https://www.osti.gov/biblio/20861277}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 10,
volume = 77,
place = {United States},
year = {Sun Oct 15 00:00:00 EDT 2006},
month = {Sun Oct 15 00:00:00 EDT 2006}
}