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Effect of low temperature cryocoolers on the development of lowtemperature superconducting magnets.

DE2001782494

Publication Date	2000
Personal Author	Green, M. A.
Page Count	4
Abstract	The commercial development of reliable 4 K cyrocoolers improves the future prospects for magnets made from low temperature superconductors (LTS). The hope of the developers of high temperature superconductors (HTS) has been to replace liquid helium cooled LTS magnets with HTS magnets that operate at or near liquid nitrogen temperature. There has been limited success in this endeavor, but continued problems with HTS conductors have greatly slowed progress toward this goal. The development of cryocoolers that reliably operate below 4 K will allow magnets made from LTS conductor to remain very competitive for many years to come. A key enabling technology for the use of low temperature cryocoolers on LTS magnets has been the development of HTS leads. This report describes the characteristics of LTS magnets that can be successfully melded to low-temperature cryocoolers. This report will also show when it is not appropriate to cool magnets made with LTS conductor. A couple of specific examples of LTS magnets where cryocoolers can be used are given.
Keywords	Cryogenic equipment Superconducting magnets Low temperature Development Cryocoolers
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Berkeley National Lab., CA.; Department of Energy, Washington, DC. andNuclear Physics. Division of
Document Type	Conference Proceedings
NTIS Issue Number	200125
Contract Number	AC03-76SF00098

Effect of low temperature cryocoolers on the development of lowtemperature superconducting magnets.

Effect of low temperature cryocoolers on the development of lowtemperature superconducting magnets.
DE2001782494

Publication Date	2000
Personal Author	Green, M. A.
Page Count	4
Abstract	The commercial development of reliable 4 K cyrocoolers improves the future prospects for magnets made from low temperature superconductors (LTS). The hope of the developers of high temperature superconductors (HTS) has been to replace liquid helium cooled LTS magnets with HTS magnets that operate at or near liquid nitrogen temperature. There has been limited success in this endeavor, but continued problems with HTS conductors have greatly slowed progress toward this goal. The development of cryocoolers that reliably operate below 4 K will allow magnets made from LTS conductor to remain very competitive for many years to come. A key enabling technology for the use of low temperature cryocoolers on LTS magnets has been the development of HTS leads. This report describes the characteristics of LTS magnets that can be successfully melded to low-temperature cryocoolers. This report will also show when it is not appropriate to cool magnets made with LTS conductor. A couple of specific examples of LTS magnets where cryocoolers can be used are given.
Keywords	Cryogenic equipment Superconducting magnets Low temperature Development Cryocoolers
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Berkeley National Lab., CA.; Department of Energy, Washington, DC. andNuclear Physics. Division of
Document Type	Conference Proceedings
NTIS Issue Number	200125
Contract Number	AC03-76SF00098