Stability measurements on cored cables in normal and superfluid helium

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The relative stability of LHC type cables has been measured by the direct heating of one of the individual strands with a short duration current pulse. The minimum energy required to initiate a quench has been determined for a number of cables which have a central core to increase the effective inter-strand cross-over resistance. Experiments were performed in both normal helium at 4.4 K and superfluid at 1.9 K. Conductors in general are less stable at the lower temperature when measured at the same fraction of critical current. Results show that the cored-cables, even when partially filled with solder or ... continued below

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6 p.

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Ghosh, A.K.; Sampson, W.B.; Kim, S.W.; Leroy, D.; Oberli, L.R. & Wilson, M.N. July 1, 1998.

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Description

The relative stability of LHC type cables has been measured by the direct heating of one of the individual strands with a short duration current pulse. The minimum energy required to initiate a quench has been determined for a number of cables which have a central core to increase the effective inter-strand cross-over resistance. Experiments were performed in both normal helium at 4.4 K and superfluid at 1.9 K. Conductors in general are less stable at the lower temperature when measured at the same fraction of critical current. Results show that the cored-cables, even when partially filled with solder or with a porous-metal filler exhibit a relatively low stability at currents close to the critical current. It is speculated that the high inter-strand electrical and thermal resistance inherent in these cables may effect the stability at high currents.

Physical Description

6 p.

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INIS; OSTI as DE98003941

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  • ICMC`98 topical conference, Enschede (Netherlands), 10-13 May 1998

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  • Other: DE98003941
  • Report No.: BNL--65650
  • Report No.: CONF-980569--
  • Grant Number: AC02-98CH10886
  • DOI: 10.2172/638203 | External Link
  • Office of Scientific & Technical Information Report Number: 638203
  • Archival Resource Key: ark:/67531/metadc691469

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Office of Scientific & Technical Information Technical Reports

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  • July 1, 1998

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 9, 2015, 9:21 p.m.

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Ghosh, A.K.; Sampson, W.B.; Kim, S.W.; Leroy, D.; Oberli, L.R. & Wilson, M.N. Stability measurements on cored cables in normal and superfluid helium, report, July 1, 1998; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc691469/: accessed October 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.