NDLI: Mechanical Behavior of the KSTAR Central Solenoid Coil Structure During Thermal Cycles

Content Provider	IEEE Xplore Digital Library
Author	Kim, H.K. Sa, J.W. Kim, H.T. Yang, H.L. Kim, Y.O. Park, K.R. Kim, K.M. Bang, E.N. Lee, K.S. Oh, Y.K. Kwon, M.
Copyright Year	2002
Abstract	The central solenoid (CS) coil system of the KSTAR device consists of four pairs of coils with up-down symmetry and a set of support structure. The CS coil system should endure various loads including thermal and electromagnetic load during operation. One of the most important roles of support structure is to preserve the structural stability of coil system from vertical forces by applying the pre-compression on the coil stack. The main assembly procedure of the coil stack is as follows: 1) coil subassembly and stacking, 2) structure assembly, 3) preloading process by heating shells in the support structure, and 4) measurement on the final dimension. The special jigs and heating system for the preloading were designed to apply pre-compression on the coil stack during the assembly at room temperature. Moreover, a few tens of thermocouples and strain gauges were installed for measuring temperature and thermal expansion of preloading structures. Since the final assembly of the CS coil was successfully completed with about 7.3 MN of preloading in 2006, the CS coil system has been experienced four thermal cycles from 300 K to 5 K until 2011. This paper describes the main results of applying the pre-compression on the coil stack and mechanical behaviors of preloading structures during thermal cycles.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	4201504
Ending Page	4201504
Page Count	1
File Size	1012314
File Format	PDF
ISSN	10518223
Volume Number	22
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coils Strain Heating Force Assembly Manganese Temperature measurement pre-compression CS coil KSTAR mechanical behavior
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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