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Title: Design issues for cryogenic cooling of short periodsuperconducting undulators

Abstract

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 ({approx}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.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE
OSTI Identifier:
918547
Report Number(s):
LBNL-53721
R&D Project: 1; BnR: YN0100000; TRN: US0805403
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Conference
Resource Relation:
Conference: Cryogenic Engineering Conference, Anchorage,Alaska, 22 - 26 September 2003
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CRYOGENICS; DESIGN; HEAT EXCHANGERS; MAGNETIC FIELDS; MAGNETS; PERMANENT MAGNETS; STORAGE RINGS; WIGGLER MAGNETS

Citation Formats

Green, M.A., Dietderich, D.R., Marks, S., Prestemon, S.O., and Schlueter, R.D. Design issues for cryogenic cooling of short periodsuperconducting undulators. United States: N. p., 2003. Web.
Green, M.A., Dietderich, D.R., Marks, S., Prestemon, S.O., & Schlueter, R.D. Design issues for cryogenic cooling of short periodsuperconducting undulators. United States.
Green, M.A., Dietderich, D.R., Marks, S., Prestemon, S.O., and Schlueter, R.D. Mon . "Design issues for cryogenic cooling of short periodsuperconducting undulators". United States. https://www.osti.gov/servlets/purl/918547.
@article{osti_918547,
title = {Design issues for cryogenic cooling of short periodsuperconducting undulators},
author = {Green, M.A. and Dietderich, D.R. and Marks, S. and Prestemon, S.O. and Schlueter, R.D.},
abstractNote = {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 ({approx}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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {9}
}

Conference:
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