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

Journal Article · Wed Aug 03 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4960068· OSTI ID:1287267

Dobbins, T. J. ^[1]; Kumar, S. T. A. ^[1]; Anderson, D. T. ^[1]

---

1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Electrical and Computer Engineering and HSX Plasma Lab.

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.

• Research Organization: Univ. of Wisconsin, Madison, WI (United States). Dept. of Electrical and Computer Engineering
• Sponsoring Organization: USDOE
• Grant/Contract Number: FG02-93ER54222
• OSTI ID: 1287267
• Journal Information: Review of Scientific Instruments, Vol. 87, Issue 11; Conference: 21st Topical Conference on High-Temperature Plasma Diagnostics, Madison, Wisconsin, USA, June 2016; ISSN 0034-6748
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
HSX