Vann, Roderick G L orcid.org/0000-0002-3105-2546, Brunner, Jakob, Ellis, R et al. (2 more authors) (2016) Preliminary measurements of the edge magnetic field pitch from 2-D Doppler backscattering in MAST and NSTX-U. Review of Scientific Instruments. 11D902. pp. 1-6. ISSN 0034-6748
Abstract
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 16 frequencies in the range 10-34.5GHz. 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. The results demonstrate encouraging agreement between SAMI and other independent measurements.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2016 Author(s). |
Dates: |
|
Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 14 Sep 2016 13:33 |
Last Modified: | 16 Oct 2024 13:13 |
Published Version: | https://doi.org/10.1063/1.4962253 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1063/1.4962253 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:104701 |
Download
Filename: 1_s2.0_S0024384116300614_main.pdf
Description: 1-s2.0-S0024384116300614-main
Licence: CC-BY 2.5