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Title: Wire tomography in the H-1NF heliac for investigation of fine structure of magnetic islands

Abstract

Electron beam wire tomography in the H-1NF heliac enables high resolution mapping of vacuum flux surfaces with minimal disruption of the plasma operations schedule. Recent experimental results have proven this technique to be a highly accurate and high resolution method for mapping vacuum magnetic islands. Islands of width as small as {delta}{approx}8 mm have been measured, providing estimates of the internal rotational transform of the island. Point-to-point comparison of the mapping results with computer tracing, in conjunction with an image warping technique, enables systematic exploration of magnetic islands and surfaces of interest. Recent development of a fast mapping technique significantly reduced the mapping time and made this technique suitable for mapping at higher magnetic fields. This article presents recent experimental results and associated techniques.

Authors:
; ;  [1]
  1. Plasma Research Laboratory, Research School of Physical Sciences and Engineering, The Australian National University, Canberra ACT 0200 (Australia)
Publication Date:
OSTI Identifier:
20953236
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 78; Journal Issue: 1; Other Information: DOI: 10.1063/1.2424453; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BEAM-PLASMA SYSTEMS; COMPARATIVE EVALUATIONS; ELECTRON BEAMS; MAGNETIC FIELDS; MAGNETIC ISLANDS; MAGNETIC SURFACES; MAGNETOHYDRODYNAMICS; MAPPING; PLASMA; PLASMA CONFINEMENT; PLASMA DIAGNOSTICS; PLASMA INSTABILITY; ROTATIONAL TRANSFORM; STELLARATORS; TOMOGRAPHY

Citation Formats

Kumar, Santhosh T. A., Blackwell, Boyd D., and Harris, Jeffrey H. Wire tomography in the H-1NF heliac for investigation of fine structure of magnetic islands. United States: N. p., 2007. Web. doi:10.1063/1.2424453.
Kumar, Santhosh T. A., Blackwell, Boyd D., & Harris, Jeffrey H. Wire tomography in the H-1NF heliac for investigation of fine structure of magnetic islands. United States. doi:10.1063/1.2424453.
Kumar, Santhosh T. A., Blackwell, Boyd D., and Harris, Jeffrey H. Mon . "Wire tomography in the H-1NF heliac for investigation of fine structure of magnetic islands". United States. doi:10.1063/1.2424453.
@article{osti_20953236,
title = {Wire tomography in the H-1NF heliac for investigation of fine structure of magnetic islands},
author = {Kumar, Santhosh T. A. and Blackwell, Boyd D. and Harris, Jeffrey H.},
abstractNote = {Electron beam wire tomography in the H-1NF heliac enables high resolution mapping of vacuum flux surfaces with minimal disruption of the plasma operations schedule. Recent experimental results have proven this technique to be a highly accurate and high resolution method for mapping vacuum magnetic islands. Islands of width as small as {delta}{approx}8 mm have been measured, providing estimates of the internal rotational transform of the island. Point-to-point comparison of the mapping results with computer tracing, in conjunction with an image warping technique, enables systematic exploration of magnetic islands and surfaces of interest. Recent development of a fast mapping technique significantly reduced the mapping time and made this technique suitable for mapping at higher magnetic fields. This article presents recent experimental results and associated techniques.},
doi = {10.1063/1.2424453},
journal = {Review of Scientific Instruments},
number = 1,
volume = 78,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2007},
month = {Mon Jan 15 00:00:00 EST 2007}
}