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Diagnosis of ITER's Large Scale Superconducting Coils Using Acoustic Emission Techniques.

Authors :
Ninomiya, A.
Arai, K.
Takano, K.
Ishigohka, T.
Kaiho, K.
Nakajima, H.
Tsuji, H.
Okuno, K.
Martovetsky, N.
Rodin, I.
Source :
IEEE Transactions on Applied Superconductivity; Jun2003 Part 2 of 3, Vol. 13 Issue 2, p1408, 4p, 3 Diagrams, 7 Graphs
Publication Year :
2003

Abstract

In 2000, Japan Atomic Energy Research Institute (JAERI) and its collaboration team accomplished many kinds of experiments under the magnetic field of 13T for the ITER Project. The target coils are the central solenoid (CS) model coil and the CS insert coil. In 2001, the test using both the CS model coil and the toroidal field (TF) insert coil was carried out and successfully finished. During the experiment, we have measured the change of amount of mechanical disturbances inside the coil using acoustic emission (AE) technology. In this paper, we report the general trend of AE characteristics obtained in the experiments for two years. That is to say, as for the CS model coil, we investigated the training characteristics of the CS model coil that experienced one cooling cycle from 4.2 K to room temperature. As a result, we confirmed the training effect of the CS model coil wound by forced flow CIC conductors. On the other hand, as for the insert coil, some peculiar AE signals were observed during the CS insert coil cyclic test. On this matter, a re-examination was carried out. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
10518223
Volume :
13
Issue :
2
Database :
Complementary Index
Journal :
IEEE Transactions on Applied Superconductivity
Publication Type :
Academic Journal
Accession number :
10470685
Full Text :
https://doi.org/10.1109/TASC.2003.812681