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Title: Dual wavelength imaging of a scrape-off layer in an advanced beam-driven field-reversed configuration

Abstract

A dual wavelength imaging system has been developed and installed on C-2U to capture 2D images of a He jet in the Scrape-Off Layer (SOL) of an advanced beam-driven Field-Reversed Configuration (FRC) plasma. The system was designed to optically split two identical images and pass them through 1 nm FWHM filters. Dual wavelength images are focused adjacent on a large format CCD chip and recorded simultaneously with a time resolution down to 10 μs using a gated micro-channel plate. The relatively compact optical system images a 10 cm plasma region with a spatial resolution of 0.2 cm and can be used in a harsh environment with high electro-magnetic noise and high magnetic field. The dual wavelength imaging system provides 2D images of either electron density or temperature by observing spectral line pairs emitted by He jet atoms in the SOL. A large field of view, combined with good space and time resolution of the imaging system, allows visualization of macro-flows in the SOL. First 2D images of the electron density and temperature observed in the SOL of the C-2U FRC are presented.

Authors:
;  [1]
  1. Tri Alpha Energy, Inc., P.O. Box 7010, Rancho Santa Margarita, California 92688-7010 (United States)
Publication Date:
OSTI Identifier:
22596584
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 11; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ATOMS; BEAMS; CAPTURE; CHARGE-COUPLED DEVICES; ELECTRON DENSITY; ELECTRONS; FIELD-REVERSED THETA PINCH DEVICES; FILTERS; FORMATES; IMAGES; MAGNETIC FIELDS; MICROCHANNEL ELECTRON MULTIPLIERS; NOISE; OPTICAL SYSTEMS; PLASMA; PLASMA SCRAPE-OFF LAYER; SPATIAL RESOLUTION; TIME RESOLUTION; WAVELENGTHS

Citation Formats

Osin, D., and Schindler, T., E-mail: dosin@trialphaenergy.com. Dual wavelength imaging of a scrape-off layer in an advanced beam-driven field-reversed configuration. United States: N. p., 2016. Web. doi:10.1063/1.4960055.
Osin, D., & Schindler, T., E-mail: dosin@trialphaenergy.com. Dual wavelength imaging of a scrape-off layer in an advanced beam-driven field-reversed configuration. United States. doi:10.1063/1.4960055.
Osin, D., and Schindler, T., E-mail: dosin@trialphaenergy.com. Tue . "Dual wavelength imaging of a scrape-off layer in an advanced beam-driven field-reversed configuration". United States. doi:10.1063/1.4960055.
@article{osti_22596584,
title = {Dual wavelength imaging of a scrape-off layer in an advanced beam-driven field-reversed configuration},
author = {Osin, D. and Schindler, T., E-mail: dosin@trialphaenergy.com},
abstractNote = {A dual wavelength imaging system has been developed and installed on C-2U to capture 2D images of a He jet in the Scrape-Off Layer (SOL) of an advanced beam-driven Field-Reversed Configuration (FRC) plasma. The system was designed to optically split two identical images and pass them through 1 nm FWHM filters. Dual wavelength images are focused adjacent on a large format CCD chip and recorded simultaneously with a time resolution down to 10 μs using a gated micro-channel plate. The relatively compact optical system images a 10 cm plasma region with a spatial resolution of 0.2 cm and can be used in a harsh environment with high electro-magnetic noise and high magnetic field. The dual wavelength imaging system provides 2D images of either electron density or temperature by observing spectral line pairs emitted by He jet atoms in the SOL. A large field of view, combined with good space and time resolution of the imaging system, allows visualization of macro-flows in the SOL. First 2D images of the electron density and temperature observed in the SOL of the C-2U FRC are presented.},
doi = {10.1063/1.4960055},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 11,
volume = 87,
place = {United States},
year = {2016},
month = {11}
}