Refrigeration Options for the Advanced Light Source Superbend Dipole Magnets

Green, M. A.; Hoyer, E.; Schlueter, R.; Taylor, C.; Wang, S. T.; Zbasnik, J.

doi:10.1007/978-1-4615-4215-5_52

Cited by 9 publications

(11 citation statements)

References 2 publications

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“…The L/A of each subsection is a physical parameter. For the lead to be optimum, the sum of the sub-section IL/A's must be equal to the value of the optimum IL/A given by equation (2).…”

Section: Optimization Of the Leads From Room Temperaturementioning

confidence: 99%

Tests of copper and HTS leads with a two-stage pulse tube drop-in cooler

Green

Wang

2012

AIP Conference Proceedings

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“…The L/A of each subsection is a physical parameter. For the lead to be optimum, the sum of the sub-section IL/A's must be equal to the value of the optimum IL/A given by equation (2).…”

Section: Optimization Of the Leads From Room Temperaturementioning

confidence: 99%

Tests of copper and HTS leads with a two-stage pulse tube drop-in cooler

Green

Wang

2012

AIP Conference Proceedings

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“…The Superbend is conduction cooled, in order to place the coils as close to the ALS electron beam as possible. To make the Superbend operation in the ALS as automatic, efficient, and economical as possible we use a 2-stage GiffordMcMahon cryocooler to provide the required refrigeration [5]. The 4 K heat load is minimized by the use of HTS leads, supplied by American Superconductor Corp., from 50 K to 4 K, and epoxy-fiberglass suspension straps with 50 K heat stations.…”

Section: B Coil and Cold Mass Designmentioning

confidence: 99%

ALS Superbend magnet system

Zbanik

Wang

Chen

et al. 2001

IEEE Trans. Appl. Supercond.

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Abstract-The Lawrence Berkeley National Laboratory is preparing to upgrade the Advanced Light Source (ALS) with three superconducting dipoles (Superbends). In this paper we present the final magnet system design which incorporates R&D test results and addresses the ALS operational concerns of alignment, availability, and economy. The design incorporates conduction-cooled Nb-Ti windings and HTS current leads, epoxy-glass suspension straps, and a Gifford-McMahon cryocooler to supply steady state refrigeration. We also present the current status of fabrication and testing.

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“…Bending magnets can be considered as insertion devices that are an integral part of the machine lattice. The Superbend dipoles on the ALS at the Lawrence Berkeley Laboratory are an example of the first type of a bending magnet insertion device [1]. Wigglers and undulators, on the other hand, often do not affect the beam dynamics of the machine in a large way.…”

Section: Introduction To Cooling Superconducting Undulatorsmentioning

confidence: 99%

“…When there are a few devices that operate at 4 K, the least expensive cooling system is often individual 4 K coolers on each device [1]. For increased reliability, the cryogenic coolers may be backed up with liquid helium and liquid nitrogen.…”

Section: Introduction To Cooling Superconducting Undulatorsmentioning

confidence: 99%

Design Issues for Cryogenic Cooling of Short Period Superconducting Undulators

Green¹,

Dietderich²,

Marks³

et al. 2004

AIP Conference Proceedings

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Superconducting insertion devices, which produce periodic magnetic fields, have been built and installed in a number of synchrotron-light source storage-rings. For the most part, these devices have been wigglers, which have relatively long period lengths. This report concerns itself with the special cryogenic issues associated with short period undulators. The motivation for considering the incorporation of superconducting technology in insertion device designs is to achieve higher magnetic fields than can be achieved with more conventional permanent magnet technology. Since the peak field decreases sharply with increased magnet gap to period ratio, the cryogenic design of the magnet system is crucial. In particular, the insulation required for a warm vacuum bore device is impractical for short period undulators. This report describes the issues that are related to a cold bore (~4 K) and an intermediate temperature bore (30 to 70 K) designs. The criteria for the use of small cryocoolers for cooling a short period undulator are presented. The problems associated with connecting small coolers to an undulator at 4.2 K are discussed.

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Refrigeration Options for the Advanced Light Source Superbend Dipole Magnets

Cited by 9 publications

References 2 publications

Tests of copper and HTS leads with a two-stage pulse tube drop-in cooler

Tests of copper and HTS leads with a two-stage pulse tube drop-in cooler

ALS Superbend magnet system

Design Issues for Cryogenic Cooling of Short Period Superconducting Undulators

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