NDLI: KSTAR Magnetic Field Measurement During the Commissioning and Remanent Field Evaluation

Content Provider	IEEE Xplore Digital Library
Author	Yonekawa, H. Kim, Y.O. Hyun Jung Lee Yoon, S.W. Hahn, S.H. Lee, K.S. Lee, D.K. Soo Hwan Park Yong Chu Bang, E.N. Park, K.R. Oh, Y.K. Bak, J.S. Leuer, J.A.
Copyright Year	2002
Abstract	An in situ measurement of the magnetic field generated by the assembled superconducting magnet coils was held by using precision Hall sensors during the commissioning of the Korea Superconducting Tokamak Advanced Research (KSTAR) device. This was done in order to investigate the magnetic influence of Incoloy 908, which is the jacket material for the cable-in-conduit conductors (CICCs) of the Nb₃Sn coils. After the PF coils were discharged from 1 kA the vertical remanent field at the plasma center was more than 10 G, while the TF coils were not energized. The vertical magnetic field generated by the PF coils had a discrepancy of up to 50 G between measurement and the calculation assuming no magnetic influence of Incoloy 908. Thus, non-negligible ferromagnetism was identified and attributed to Incoloy 908. In contrast, most of the hysteresis observed in the magnetic measurements was eliminated when the Incoloy 908 of the TF windings was saturated by the TF coil charging.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1573
Ending Page	1576
Page Count	4
File Size	536655
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic field measurement Superconducting magnets Superconducting coils Magnetic sensors Superconducting cables Saturation magnetization Magnetic materials Conducting materials Plasma measurements Assembly superconducting magnet coil Incoloy 908 ${\rm Nb}_{3}{\rm Sn}$ remanent magnetic field
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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