Abstract
RHIC design criteria require that a faulty string be warmed rapidly to a serviceable temperature. Integral electric heaters warm the superconducting magnets. The magnets are very sensitive to temperature peaks and local gradients. Helium gas is circulated during warmup so that all points are warmed at nearly equal rates. An optimized string warmup procedure gives a continuous, uniform temperature profile, that is flat and rises steadily to room temperature at a rate which allows manageable recovery of the liquid helium content of the magnets. The ideal is not easily obtained. Various warmup schemes are studied. Limitations on the process, including those of the RHIC helium recovery system are discussed. A finite difference code (Fortran) is used to model a magnet string with flowing helium and electric heat generation. Temperature dependent properties of metal and gas including variable density are accounted for. Predictions are compared to physical test data.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
RHIC Design Manual, Brookhaven National Laboratory, October, 1995.
R.P. Shutt, Cooldown Times for ISA Magnet Rings, Technical Note No. 17, Isabelle Division, Brookhaven National Laboratory, April, 1976.
H. Lierl, P. Schmuser, Cooldown of a HERA Octant Equipped with Cold Iron Dipoles, Deutsches Elektronen-Synchrotron DESY, Hamburg, Report DESY HERA 84/16, July 1984.
P. Cruikshank, N. Kos, G. Riddone, L. Tavian, CERN, Investigation of Thermal and Vacuum Transients on the LHC Prototype Magnet String, paper presented at CEC ‘96, Portland, OR.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1998 Springer Science+Business Media New York
About this chapter
Cite this chapter
Rank, J., Iarocci, M., Rehak, M., Wu, K.C. (1998). Ring Warmup and Helium Recovery for the RHIC Accelerator: Thermal Analysis of the Warmup of a Superconducting Magnet String. In: Kittel, P. (eds) Advances in Cryogenic Engineering. Advances in Cryogenic Engineering, vol 43. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9047-4_61
Download citation
DOI: https://doi.org/10.1007/978-1-4757-9047-4_61
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4757-9049-8
Online ISBN: 978-1-4757-9047-4
eBook Packages: Springer Book Archive