Preliminary measurements of the edge magnetic field pitch from 2-D Doppler backscattering in MAST and NSTX-U (invited)
The Synthetic Aperture Microwave Imaging (SAMI) system is a novel diagnostic consisting of an array of 8 independently phased antennas. At any one time, SAMI operates at one of the 16 frequencies in the range 10-34.5 GHz. The imaging beam is steered in software post-shot to create a picture of the e...
Published in: | Review of Scientific Instruments |
---|---|
Main Authors: | , , , , |
Language: | unknown |
Published: |
2021
|
Subjects: | |
Online Access: | http://www.osti.gov/servlets/purl/1328862 https://www.osti.gov/biblio/1328862 https://doi.org/10.1063/1.4962253 |
id |
ftosti:oai:osti.gov:1328862 |
---|---|
record_format |
openpolar |
spelling |
ftosti:oai:osti.gov:1328862 2023-07-30T04:06:36+02:00 Preliminary measurements of the edge magnetic field pitch from 2-D Doppler backscattering in MAST and NSTX-U (invited) Vann, R. G. L. Brunner, K. J. Ellis, R. Taylor, G. Thomas, D. A. 2021-07-21 application/pdf http://www.osti.gov/servlets/purl/1328862 https://www.osti.gov/biblio/1328862 https://doi.org/10.1063/1.4962253 unknown http://www.osti.gov/servlets/purl/1328862 https://www.osti.gov/biblio/1328862 https://doi.org/10.1063/1.4962253 doi:10.1063/1.4962253 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY 2021 ftosti https://doi.org/10.1063/1.4962253 2023-07-11T09:15:43Z The Synthetic Aperture Microwave Imaging (SAMI) system is a novel diagnostic consisting of an array of 8 independently phased antennas. At any one time, SAMI operates at one of the 16 frequencies in the range 10-34.5 GHz. The imaging beam is steered in software post-shot to create a picture of the entire emission surface. In SAMI’s active probing mode of operation, the plasma edge is illuminated with a monochromatic source and SAMI reconstructs an image of the Doppler back-scattered (DBS) signal. By assuming that density fluctuations are extended along magnetic field lines, and knowing that the strongest back-scattered signals are directed perpendicular to the density fluctuations, SAMI’s 2-D DBS imaging capability can be used to measure the pitch of the edge magnetic field. In this paper, we present preliminary pitch angle measurements obtained by SAMI on the Mega Amp Spherical Tokamak (MAST) at Culham Centre for Fusion Energy and on the National Spherical Torus Experiment Upgrade at Princeton Plasma Physics Laboratory. Lastly, the results demonstrate encouraging agreement between SAMI and other independent measurements. Other/Unknown Material sami SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Review of Scientific Instruments 87 11 |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY |
spellingShingle |
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY Vann, R. G. L. Brunner, K. J. Ellis, R. Taylor, G. Thomas, D. A. Preliminary measurements of the edge magnetic field pitch from 2-D Doppler backscattering in MAST and NSTX-U (invited) |
topic_facet |
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY |
description |
The Synthetic Aperture Microwave Imaging (SAMI) system is a novel diagnostic consisting of an array of 8 independently phased antennas. At any one time, SAMI operates at one of the 16 frequencies in the range 10-34.5 GHz. The imaging beam is steered in software post-shot to create a picture of the entire emission surface. In SAMI’s active probing mode of operation, the plasma edge is illuminated with a monochromatic source and SAMI reconstructs an image of the Doppler back-scattered (DBS) signal. By assuming that density fluctuations are extended along magnetic field lines, and knowing that the strongest back-scattered signals are directed perpendicular to the density fluctuations, SAMI’s 2-D DBS imaging capability can be used to measure the pitch of the edge magnetic field. In this paper, we present preliminary pitch angle measurements obtained by SAMI on the Mega Amp Spherical Tokamak (MAST) at Culham Centre for Fusion Energy and on the National Spherical Torus Experiment Upgrade at Princeton Plasma Physics Laboratory. Lastly, the results demonstrate encouraging agreement between SAMI and other independent measurements. |
author |
Vann, R. G. L. Brunner, K. J. Ellis, R. Taylor, G. Thomas, D. A. |
author_facet |
Vann, R. G. L. Brunner, K. J. Ellis, R. Taylor, G. Thomas, D. A. |
author_sort |
Vann, R. G. L. |
title |
Preliminary measurements of the edge magnetic field pitch from 2-D Doppler backscattering in MAST and NSTX-U (invited) |
title_short |
Preliminary measurements of the edge magnetic field pitch from 2-D Doppler backscattering in MAST and NSTX-U (invited) |
title_full |
Preliminary measurements of the edge magnetic field pitch from 2-D Doppler backscattering in MAST and NSTX-U (invited) |
title_fullStr |
Preliminary measurements of the edge magnetic field pitch from 2-D Doppler backscattering in MAST and NSTX-U (invited) |
title_full_unstemmed |
Preliminary measurements of the edge magnetic field pitch from 2-D Doppler backscattering in MAST and NSTX-U (invited) |
title_sort |
preliminary measurements of the edge magnetic field pitch from 2-d doppler backscattering in mast and nstx-u (invited) |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/1328862 https://www.osti.gov/biblio/1328862 https://doi.org/10.1063/1.4962253 |
genre |
sami |
genre_facet |
sami |
op_relation |
http://www.osti.gov/servlets/purl/1328862 https://www.osti.gov/biblio/1328862 https://doi.org/10.1063/1.4962253 doi:10.1063/1.4962253 |
op_doi |
https://doi.org/10.1063/1.4962253 |
container_title |
Review of Scientific Instruments |
container_volume |
87 |
container_issue |
11 |
_version_ |
1772819313663672320 |