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Title: Design and installation of a ferromagnetic wall in tokamak geometry

Here, low-activation ferritic steels are leading material candidates for use in next-generation fusion development experiments such as a prospective component test facility and DEMO power reactor. Understanding the interaction of plasmas with a ferromagnetic wall will provide crucial physics for these facilities. In order to study ferromagnetic effects in toroidal geometry, a ferritic wall upgrade was designed and installed in the High Beta Tokamak–Extended Pulse (HBT-EP). Several material options were investigated based on conductivity, magnetic permeability, vacuum compatibility, and other criteria, and the material of choice (high-cobalt steel) is characterized. Installation was accomplished quickly, with minimal impact on existing diagnostics and overall machine performance, and initial results demonstrate the effects of the ferritic wall on plasma stability.
Authors:
ORCiD logo [1] ;  [1] ;  [1] ;  [1] ; ORCiD logo [1]
  1. Columbia Univ., New York, NY (United States)
Publication Date:
Grant/Contract Number:
FG02-86ER53222
Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 86; Journal Issue: 10; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Research Org:
Columbia Univ., New York, NY (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
OSTI Identifier:
1469383
Alternate Identifier(s):
OSTI ID: 1223155

Hughes, P. E., Levesque, J. P., Rivera, N., Mauel, M. E., and Navratil, G. A.. Design and installation of a ferromagnetic wall in tokamak geometry. United States: N. p., Web. doi:10.1063/1.4932312.
Hughes, P. E., Levesque, J. P., Rivera, N., Mauel, M. E., & Navratil, G. A.. Design and installation of a ferromagnetic wall in tokamak geometry. United States. doi:10.1063/1.4932312.
Hughes, P. E., Levesque, J. P., Rivera, N., Mauel, M. E., and Navratil, G. A.. 2015. "Design and installation of a ferromagnetic wall in tokamak geometry". United States. doi:10.1063/1.4932312. https://www.osti.gov/servlets/purl/1469383.
@article{osti_1469383,
title = {Design and installation of a ferromagnetic wall in tokamak geometry},
author = {Hughes, P. E. and Levesque, J. P. and Rivera, N. and Mauel, M. E. and Navratil, G. A.},
abstractNote = {Here, low-activation ferritic steels are leading material candidates for use in next-generation fusion development experiments such as a prospective component test facility and DEMO power reactor. Understanding the interaction of plasmas with a ferromagnetic wall will provide crucial physics for these facilities. In order to study ferromagnetic effects in toroidal geometry, a ferritic wall upgrade was designed and installed in the High Beta Tokamak–Extended Pulse (HBT-EP). Several material options were investigated based on conductivity, magnetic permeability, vacuum compatibility, and other criteria, and the material of choice (high-cobalt steel) is characterized. Installation was accomplished quickly, with minimal impact on existing diagnostics and overall machine performance, and initial results demonstrate the effects of the ferritic wall on plasma stability.},
doi = {10.1063/1.4932312},
journal = {Review of Scientific Instruments},
number = 10,
volume = 86,
place = {United States},
year = {2015},
month = {10}
}