Transportation Studies: 40-mm Collider Dipole Magnets
Several fully functional 40-mm Collider Dipole Magnets (CDM) were instrumented with accelerometers to monitor shock and vibration loads during transport. The magnets were measured with optical tooling telescopes before and after transport. Changes in mechanical alignment due to shipping and handling were determined. The mechanical stability of the cryogen lines were checked using the same method. Field quality and dipole angle were measured warm before and after transport to determine changes in these parameters. Power spectra were calculated for accelerometers located on the cold mass, vacuum vessel, and trailer bed. Where available, plots of field quality and dipole roll both before and after were created.
Shipping loads measured were largest in the vertical direction, where most of the structural deformation of the magnet was evident. It was not clear that magnetic performance was affected by the shipping and handling environment.
KeywordsFatigue Transportation Doyle
Unable to display preview. Download preview PDF.
- 1.B.J. Benda, R.D. Campbell, D.J. Doyle, and J.J. Johnson, “SSC Dipole Magnet System: Stress Analysis for Seismic and Transportation Loadings,” EQE Engineering, January 1991.Google Scholar
- 2.R.E. Glass and K.W. Gwinn, “TRUPACT-I Over-the-Road Test,” Sandia National Laboratories, SAND87-0513, October, 1987.Google Scholar
- 3.Vibration Engineering Consultants, Inc., “SSC Magnet DSHIP Transportation Vibration Test,” 1989.Google Scholar
- 4.A.R. Jalloh, R. Viola, and E. Daly. “The Mechanical Response of the SSC Dipole Magnet to Ground Motion,” Proceedings from the 1991 International Industrial Symposium on the Superconducting Super Collider.Google Scholar
- 5.J.T. Foley, M.B. Gens, and C. F. Magnuson, “Current Models of the Dynamic Environment of Transportation,” Proceedings of the Institute for Environmental Sciences, pp. 35–44 (1972).Google Scholar
- 6.C.M. Harris and C.E. Crede, Shock and Vibration Handbook., McGraw-Hill, 1976.Google Scholar
- 7.C.F. Magnuson, “Shock and Vibration Environments for a Large Shipping Container During Truck Transport (Part I),” Sandia National Laboratories, SAND77-1110, September 1977.Google Scholar
- 8.P. Wanderer, “Limit on Multipole Changes in a 17-m Dipole due to Transportation,” Brookhaven National Laboratory, SSCL-N-769, August 1991.Google Scholar