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Cryogenic system for a superconducting spectrometer [electronic resource].

Published
Berkeley, Calif. : Lawrence Berkeley National Laboratory, 1983.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: 5 : digital, PDF file
Additional Creators
Lawrence Berkeley National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The Heavy Ion Spectrometer System (HISS) relies upon superconducting coils of cryostable, pool boiling design to provide a maximum particle bending field of 3 tesla. This paper describes the cryogenic facility including helium refrigeration, gas management, liquid nitrogen system, and the overall control strategy. The system normally operates with a 4 K heat load of 150 watts; the LN/sub 2/ circuits absorb an additional 4000 watts. 80K intercept control is by an LSI 11 computer. Total available refrigeration at 4K is 400 watts using reciprocating expanders at the 20K and 4K level. The minicomputer has the capability of optimizing overall utility input cost by varying operating points. A hybrid of pneumatic, analog, and digital control is successful in providing full time unattended operation. The 7m diameter magnet/cryostat assembly is rotatable through 180 degrees to provide a variety of spectrometer orientations.
Report Numbers
E 1.99:lbl-15100
E 1.99: conf-830311-168
conf-830311-168
lbl-15100
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
03/01/1983.
"lbl-15100"
" conf-830311-168"
"DE83012995"
Particle accelerator conference, Santa Fe, NM, USA, 21 Mar 1983.
Porter, J.
Funding Information
AC03-76SF00098
View MARC record | catkey: 13828452