Quench of superconducting magnet induced by mechanical disturbance using impact hammer

Author

Ninomiya, A. ; Inada, T. ; Akiba, K. ; Kanda, Y. ; Uriu, Y. ; Ishigohka, T.

Author_Institution

Fac. of Eng., Seikei Univ., Tokyo, Japan

Volume

32

Issue

4

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

3081

Lastpage

3084

Abstract

In an epoxy-impregnated superconducting magnet, triggers of quench are considered to be conductor motion or epoxy cracking which succeed the temperature rise of the conductor induced by friction between conductor and epoxy or conductor and conductor. A more direct method which makes a quench would be hitting the magnet with mechanical hammer. As far as we know, papers which treated this type of quench are very few. So, we have carried out a quench experiment triggered by mechanical impact induced by dropping a weight. We have investigated the relation between magnitude of the mechanical disturbance and the behavior of the superconducting magnet. And also, we have investigated the relation between the impact energy and the structural change of superconducting magnet using an ultrasonic transfer function which we have already proposed as a quench detection method

Keywords

composite superconductors; impact testing; quenching (thermal); superconducting device testing; superconducting magnets; epoxy-impregnated superconducting magnet; impact energy; impact hammer; mechanical disturbance; mechanical impact; quench detection method; quench triggers; structural change; ultrasonic transfer function; Conducting materials; Conductors; Energy measurement; Magnetic field induced strain; Magnetic materials; Magnetic sensors; Strain measurement; Superconducting magnets; Temperature; Transfer functions;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.511527

Filename

511527