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Title: Lack of dependence on resonant error field of locked mode island size in ohmic plasmas in DIII-D

Abstract

DIII-D experiments show that fully penetrated resonant n=1 error field locked modes in Ohmic plasmas with safety factor q 95≳3 grow to similar large disruptive size, independent of resonant error field correction. Relatively small resonant (m/n=2/1) static error fields are shielded in Ohmic plasmas by the natural rotation at the electron diamagnetic drift frequency. However, the drag from error fields can lower rotation such that a bifurcation results, from nearly complete shielding to full penetration, i.e., to a driven locked mode island that can induce disruption.

Authors:
 [1];  [1];  [1]
  1. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1345534
Grant/Contract Number:  
FC02-04ER54698; AC05-06OR23100
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 55; Journal Issue: 2; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Haye, R. J. La, Paz-Soldan, C., and Strait, E. J. Lack of dependence on resonant error field of locked mode island size in ohmic plasmas in DIII-D. United States: N. p., 2015. Web. doi:10.1088/0029-5515/55/2/023011.
Haye, R. J. La, Paz-Soldan, C., & Strait, E. J. Lack of dependence on resonant error field of locked mode island size in ohmic plasmas in DIII-D. United States. doi:10.1088/0029-5515/55/2/023011.
Haye, R. J. La, Paz-Soldan, C., and Strait, E. J. Fri . "Lack of dependence on resonant error field of locked mode island size in ohmic plasmas in DIII-D". United States. doi:10.1088/0029-5515/55/2/023011. https://www.osti.gov/servlets/purl/1345534.
@article{osti_1345534,
title = {Lack of dependence on resonant error field of locked mode island size in ohmic plasmas in DIII-D},
author = {Haye, R. J. La and Paz-Soldan, C. and Strait, E. J.},
abstractNote = {DIII-D experiments show that fully penetrated resonant n=1 error field locked modes in Ohmic plasmas with safety factor q95≳3 grow to similar large disruptive size, independent of resonant error field correction. Relatively small resonant (m/n=2/1) static error fields are shielded in Ohmic plasmas by the natural rotation at the electron diamagnetic drift frequency. However, the drag from error fields can lower rotation such that a bifurcation results, from nearly complete shielding to full penetration, i.e., to a driven locked mode island that can induce disruption.},
doi = {10.1088/0029-5515/55/2/023011},
journal = {Nuclear Fusion},
number = 2,
volume = 55,
place = {United States},
year = {Fri Jan 23 00:00:00 EST 2015},
month = {Fri Jan 23 00:00:00 EST 2015}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 2 works
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