Report of the task force on low-temperature magnet operation

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The task force has studied two options for an 8 T ring operating at 2 K. In the first of these the synchrotron light load is taken at 2 K, and in the second it is intercepted on a bore liner at 4.5 K. The possibility of staged construction of the 20 Tev, 8 T, 2 K ring with initial operation at 15 Tev, 6 T and 4.5 K has also been considered. A set of dimensions and specifications has been developed for each of the two 8 T options in the three categories: magnets, cryostat, and refrigeration system with ... continued below

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145 p.

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Creator: Unknown. July 2, 1985.

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Description

The task force has studied two options for an 8 T ring operating at 2 K. In the first of these the synchrotron light load is taken at 2 K, and in the second it is intercepted on a bore liner at 4.5 K. The possibility of staged construction of the 20 Tev, 8 T, 2 K ring with initial operation at 15 Tev, 6 T and 4.5 K has also been considered. A set of dimensions and specifications has been developed for each of the two 8 T options in the three categories: magnets, cryostat, and refrigeration system with the object of providing for a detailed cost comparison with the 6 T, design D ring. Cost information for refrigeration systems that are not strictly comparable to design D have been developed from component quotations. A very preliminary discussion of costs is included in the report. A summary of the principal findings of the task force is as follows: the temperature at which a 6 T, 4.5 K magnet will operate at 8 T with the same critical current safety margin is found to be 2 K; an increase of 0.5 cm in the magnet inner diameter is found to be sufficient to accommodate a fluid-cooled bore liner; the most important change in going from the design D magnet to a magnet suitable for operation at 8 T, 2 K is an increase of about 10% in the superconductor and 60% in the iron per unit length; the cryostat for 2 K is fundamentally the same as for design D; for the same load ratings complete refrigeration system for the 2 K ring costs about 1.5 times as much as a system for a 4.5 K ring and uses twice the power; two ideas have come up in the investigations that clearly have merit and deserve further study independent of the choice of magnet style. These are the bore liner for synchrotron radiation interception and the ESCAR or pool-boiling cooling system.

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145 p.

Notes

OSTI as DE95011071

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  • Other Information: PBD: 2 Jul 1985

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  • Other: DE95011071
  • Report No.: SSC-SR--1007
  • Grant Number: AC35-89ER40486
  • DOI: 10.2172/90653 | External Link
  • Office of Scientific & Technical Information Report Number: 90653
  • Archival Resource Key: ark:/67531/metadc792221

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  • July 2, 1985

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  • Dec. 19, 2015, 7:14 p.m.

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  • Jan. 29, 2016, 7:24 p.m.

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Report of the task force on low-temperature magnet operation, report, July 2, 1985; United States. (digital.library.unt.edu/ark:/67531/metadc792221/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.