Advertisement

Application of Acoustic Emission Technique to a Multi-Filamentary 15.1 Tesla Superconducting Magnet System

  • H. Maeda
  • A. Sato
  • M. Koizumi
  • M. Urata
  • S. Murase
  • I. Takano
  • N. Aoki
  • M. Ichihara
  • E. Suzuki
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 31)

Abstract

A technique combining acoustic emission (AE) and voltage measurement has been applied to a quench experiment conducted on a newly fabricated multi-filamentary 15.1 tesla (T) superconducting magnet system. The system consists of a wind and react Nb3Sn insert and dry wound NbTi background solenoid. The magnet system was charged in (i) He I and (ii) pressurized He II. The magnet system experienced many premature quenches, which were preceded by AE and voltage spikes. Quenches for the Nb3Sn insert were due to the debonding between the winding and the magnet form, while those for the NbTi magnet were due to conductor motion. The magnet system finally attained the short sample critical current, where neither AE burst nor voltage spike appeared prior to the quench: They were 485 A, 13.6 T, in He I and 540 A, 15.1 T, in He II.

Keywords

Acoustic Emission Magnet System Acoustic Emission Signal Acoustic Emission Technique Magnet Test 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    O. Tsukamoto, J.F. Maguire, E.S. Bobrov and Y. Iwasa, Identification of quench origin in a superconductor with acoustic emission and voltage measurement, Appl. Phys. Lett. 39 (2): 172 (1981).CrossRefGoogle Scholar
  2. 2.
    H. Maeda, M. Koizumi and S. Murase, Application of the acoustic emission technique to the react and wind processed Nb3Sn superconducting magnet, Cryogenics: 23: 444 (1983).CrossRefGoogle Scholar
  3. 3.
    S. Murase et al., Properties and performances of the mult ifilamentary Nb3Sn with Ti addition processed by the Nb tube method, IEEE Trans, on Magn. MAG-21: 316 (1985).CrossRefGoogle Scholar
  4. 4.
    E. S. Bobrov and J.E.C. Williams, Direct optimization of the winding process for superconducting solenoid magnets (linear programing approach), IEEE Trans, on Magn., MAG-17: 447 (1981).CrossRefGoogle Scholar
  5. 5.
    H. Maeda and Y. Iwasa, Heat generation from epoxy cracks and bond failures, Cryogenics: 22: 473 (1982).CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • H. Maeda
    • 1
  • A. Sato
    • 1
  • M. Koizumi
    • 1
  • M. Urata
    • 1
  • S. Murase
    • 1
  • I. Takano
    • 1
  • N. Aoki
    • 2
  • M. Ichihara
    • 2
  • E. Suzuki
    • 2
  1. 1.Toshiba R&D CenterUkishima, Kawasaki, KanagawaJapan
  2. 2.Showa Electric Wire and Cable CompanyOdasakae, Kawasaki, KanagawaJapan

Personalised recommendations