NDLI: Performance Tests of the Subcooling System for the LHD Helical Coils

Content Provider	IEEE Xplore Digital Library
Author	Obana, T. Imagawa, S. Hamaguchi, S. Yanagi, N. Moriuchi, S. Sekiguchi, H. Oba, K. Mito, T.
Copyright Year	2002
Abstract	Performance tests of the subcooling system for the helical coils in the large helical device (LHD) have been performed. For the performance of the system, it is necessary to supply the helical coils with a subcooled helium mass flow of 50 g/s at 3.2 K. From the test results, the performance was able to fulfill the design requirements of the system. Additionally, the coil temperature has been evaluated with the quasi-one dimensional numerical calculation, in which the numerical model simplifying the helical coil configuration is used. The coil temperature would be 3.6 K under a steady heat load of 100 W from outside of the coil case in the system which maintains the above performance, as the result of the calculation.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1475
Ending Page	1478
Page Count	4
File Size	552506
File Format	PDF
ISSN	10518223
Volume Number	18
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	System testing Coils Plasma temperature Cooling Numerical models Heat recovery Hydrogen Temperature control Control systems subcooled helium Helical coil pool-cooled
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Results of the Excitation Test of the LHD Helical Coils Cooled by Subcooled Helium

Increase of Operating Current of the LHD Helical Coils by Upgrading the Cooling System

Operation and Control of Helium Subcooling System of LHD Helical Coils During Change of Rotational Speed of Cold Compressors

Improvement in Cryogenic Stability of the Model Coil of the LHD Helical Coil by Lowering the Temperature

Results of stability test in subcooled helium for the R&D coil of the LHD helical coil

Design and fabrication of pool cooled helical coil as an R&D program for Large Helical Device

Thermal hydraulic characteristics of superconducting coil cooled by subcooled He I

Performance of the LHD cryogenic system during cooling and excitation tests

First cool-down performance of the LHD

Performance Tests of the Subcooling System for the LHD Helical Coils

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