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Title: A synthetic diagnostic for beam emission spectroscopy in the helically symmetric experiment stellarator

Abstract

The Helically Symmetric Experiment (HSX) has a number of active spectroscopy diagnostics. Due to the relatively large beam width compared to the plasma minor radius, it is difficult to achieve good spatial resolution at the core of the HSX plasma. This is due to the fact that the optical sightline cuts through many flux surfaces with varying field vectors within the beam. It is important to accurately model the beam width effects in order to compare the experimental results with theoretical models. We've developed a synthetic diagnostic for this purpose. This synthetic diagnostic calculates the effect of spot size and beam width on the measurements of quantities of interest, including radial electric field, flow velocity, and Stark polarization.

Authors:
 [1];  [1];  [1]
  1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Electrical and Computer Engineering and HSX Plasma Lab.
Publication Date:
Research Org.:
Univ. of Wisconsin, Madison, WI (United States). Dept. of Electrical and Computer Engineering
Sponsoring Org.:
USDOE
OSTI Identifier:
1287267
Grant/Contract Number:  
FG02-93ER54222
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 11; Conference: 21st Topical Conference on High-Temperature Plasma Diagnostics, Madison, Wisconsin, USA, June 2016; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; HSX

Citation Formats

Dobbins, T. J., Kumar, S. T. A., and Anderson, D. T. A synthetic diagnostic for beam emission spectroscopy in the helically symmetric experiment stellarator. United States: N. p., 2016. Web. doi:10.1063/1.4960068.
Dobbins, T. J., Kumar, S. T. A., & Anderson, D. T. A synthetic diagnostic for beam emission spectroscopy in the helically symmetric experiment stellarator. United States. doi:10.1063/1.4960068.
Dobbins, T. J., Kumar, S. T. A., and Anderson, D. T. Wed . "A synthetic diagnostic for beam emission spectroscopy in the helically symmetric experiment stellarator". United States. doi:10.1063/1.4960068. https://www.osti.gov/servlets/purl/1287267.
@article{osti_1287267,
title = {A synthetic diagnostic for beam emission spectroscopy in the helically symmetric experiment stellarator},
author = {Dobbins, T. J. and Kumar, S. T. A. and Anderson, D. T.},
abstractNote = {The Helically Symmetric Experiment (HSX) has a number of active spectroscopy diagnostics. Due to the relatively large beam width compared to the plasma minor radius, it is difficult to achieve good spatial resolution at the core of the HSX plasma. This is due to the fact that the optical sightline cuts through many flux surfaces with varying field vectors within the beam. It is important to accurately model the beam width effects in order to compare the experimental results with theoretical models. We've developed a synthetic diagnostic for this purpose. This synthetic diagnostic calculates the effect of spot size and beam width on the measurements of quantities of interest, including radial electric field, flow velocity, and Stark polarization.},
doi = {10.1063/1.4960068},
journal = {Review of Scientific Instruments},
number = 11,
volume = 87,
place = {United States},
year = {2016},
month = {8}
}

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