Measurement of internal forces in superconducting accelerator magnets with strain gauge transducers
An improved method has been developed for the measurement of internal forces in superconducting accelerator magnets, in particular the compressive stresses in coils and the end restraint forces on the coils. The transducers have been designed to provide improved sensitivity to purely mechanical strain by using bending mode deflections for sensing the applied loads. Strain gauge resistance measurements are made with a new system that eliminates sources of errors due to spurious resistance changes in interconnecting wiring and solder joints. The design of the transducers and their measurement system is presented along with a discussion of the method of compensation for thermal and magnetic effects, methods of calibration with typical calibration data, and measured effect in actual magnets of the thermal stress changes from cooldown and the Lorentz forces during magnet excitation. 13 figs., 1 tab.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6276641
- Report Number(s):
- BNL-41979; CONF-880812-43; ON: DE89008158; TRN: 89-008566
- Resource Relation:
- Conference: Applied superconductivity conference, San Francisco, CA, USA, 21 Aug 1988; Other Information: Paper copy only, copy does not permit microfiche production
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mechanical performance of a twin-aperture 56 mm bore 1 m long dipole model made with SSC type cables
Measurement of displacements in large boreholes with a strain-gauged proving ring
Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BEAM BENDING MAGNETS
THERMAL STRESSES
MEASURING INSTRUMENTS
DESIGN
MEASURING METHODS
ACCELERATORS
CALIBRATION
LORENTZ FORCE
STRAINS
SUPERCONDUCTING MAGNETS
TRANSDUCERS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
MAGNETS
STRESSES
SUPERCONDUCTING DEVICES
430300* - Particle Accelerators- Auxiliaries & Components
440104 - Radiation Instrumentation- High Energy Physics Instrumentation