Development of collar lamination strain gauges for coil stress measurements in superconducting accelerator magnets

Author

Ozelis, J.P. ; Bause, P. ; Bossert, R. ; Dominguez, J. ; Feher, S. ; Heger, T.

Author_Institution

Fermi Nat. Accel. Lab., Batavia, IL, USA

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

590

Lastpage

593

Abstract

A new type of strain gauge has been developed for measuring coil stresses in superconducting magnets. It consists of commercial film-type strain gauges mounted directly on the pole-tip area of coil collar laminations. These gauges are extremely simple to manufacture, calibrate, and install in prototype magnets. We discuss the motivation for and design of these gauges, present results from calibration tests performed at 300 K and 4.2 K, and compare these results with calibration of existing beam-type transducer gauges. We discuss calibration reproducibility, reliability, and accuracy. We also present preliminary coil stress measurements using these gauges in a model quadrupole magnet during the collaring, yoking, cool down, and excitation processes.

Keywords

accelerator magnets; calibration; strain gauges; stress measurement; superconducting coils; superconducting magnets; 300 K; 4.2 K; accuracy; beam-type transducer gauges; calibration reproducibility; calibration tests; coil stress measurements; collar lamination strain gauges; collaring; cool down; excitation processes; film-type strain gauges; prototype magnets; quadrupole magnet; reliability; superconducting accelerator magnets; yoking; Calibration; Capacitive sensors; Lamination; Magnetic field induced strain; Manufacturing; Prototypes; Strain measurement; Stress measurement; Superconducting coils; Superconducting magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.614573

Filename

614573