The multi-spectral line-polarization MSE system on Alcator C-Mod
Abstract
A multi-spectral line-polarization motional Stark effect (MSE-MSLP) diagnostic has been developed for the Alcator C-Mod tokamak wherein the Stokes vector is measured in multiple wavelength bands simultaneously on the same sightline to enable better polarized background subtraction. A ten-sightline, four wavelength MSE-MSLP detector system was designed, constructed, and qualified. This system consists of a high-throughput polychromator for each sightline designed to provide large étendue and precise spectral filtering in a cost-effective manner. Each polychromator utilizes four narrow bandpass interference filters and four custom large diameter avalanche photodiode detectors. Two filters collect light to the red and blue of the MSE emission spectrum while the remaining two filters collect the beam pi and sigma emission generated at the same viewing volume. The filter wavelengths are temperature tuned using custom ovens in an automated manner. Furthermore, all system functions are remote controllable and the system can be easily retrofitted to existing single-wavelength line-polarization MSE systems.
- Authors:
-
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1350532
- Grant/Contract Number:
- AC02-09CH11466
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Review of Scientific Instruments
- Additional Journal Information:
- Journal Volume: 87; Journal Issue: 11; Journal ID: ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
Citation Formats
Mumgaard, R. T., Scott, S. D., and Khoury, M. The multi-spectral line-polarization MSE system on Alcator C-Mod. United States: N. p., 2016.
Web. doi:10.1063/1.4959793.
Mumgaard, R. T., Scott, S. D., & Khoury, M. The multi-spectral line-polarization MSE system on Alcator C-Mod. United States. https://doi.org/10.1063/1.4959793
Mumgaard, R. T., Scott, S. D., and Khoury, M. Wed .
"The multi-spectral line-polarization MSE system on Alcator C-Mod". United States. https://doi.org/10.1063/1.4959793. https://www.osti.gov/servlets/purl/1350532.
@article{osti_1350532,
title = {The multi-spectral line-polarization MSE system on Alcator C-Mod},
author = {Mumgaard, R. T. and Scott, S. D. and Khoury, M.},
abstractNote = {A multi-spectral line-polarization motional Stark effect (MSE-MSLP) diagnostic has been developed for the Alcator C-Mod tokamak wherein the Stokes vector is measured in multiple wavelength bands simultaneously on the same sightline to enable better polarized background subtraction. A ten-sightline, four wavelength MSE-MSLP detector system was designed, constructed, and qualified. This system consists of a high-throughput polychromator for each sightline designed to provide large étendue and precise spectral filtering in a cost-effective manner. Each polychromator utilizes four narrow bandpass interference filters and four custom large diameter avalanche photodiode detectors. Two filters collect light to the red and blue of the MSE emission spectrum while the remaining two filters collect the beam pi and sigma emission generated at the same viewing volume. The filter wavelengths are temperature tuned using custom ovens in an automated manner. Furthermore, all system functions are remote controllable and the system can be easily retrofitted to existing single-wavelength line-polarization MSE systems.},
doi = {10.1063/1.4959793},
journal = {Review of Scientific Instruments},
number = 11,
volume = 87,
place = {United States},
year = {Wed Aug 17 00:00:00 EDT 2016},
month = {Wed Aug 17 00:00:00 EDT 2016}
}
Web of Science
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Works referencing / citing this record:
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Optimal MSE polarisation angle and q-profile estimation using Kalman filters and the plasma simulator RAPTOR
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