Open AccessRefurbishment and testing of the 1970's era LASS solenoid coils for Jlab's Hall D
Author(s) -
Joshua Ballard,
G. Biallas,
P. Brindza,
Thomas Carstens,
J. Creel,
H. Egiyan,
Floyd Martin,
Y. Qiang,
S. Spiegel,
Mark Stevens,
Mark Wissmann,
E. Wolin
Publication year - 2012
Publication title -
aip conference proceedings
Language(s) - English
Resource type - Conference proceedings
eISSN - 1551-7616
pISSN - 0094-243X
DOI - 10.1063/1.4707001
Subject(s) - nuclear physics , physics , solenoid , nuclear engineering , superconducting magnet , electromagnetic coil , piping , magnet , particle accelerator , cryostat , compact muon solenoid , upgrade , linear particle accelerator , engineering , muon , electrical engineering , superconductivity , optics , computer science , beam (structure) , quantum mechanics , operating system , thermodynamics
JLab refurbished the LASS1, 1.85 m bore Solenoid, consisting of four superconducting coils to act as the principal analysis magnet for nuclear physics in the newly constructed, Hall D at Jefferson Lab. The coils, built in 1971 at Stanford Linier Accelerator Center and used a second time at the MEGA Experiment at Los Alamos, had electrical shorts and leaks to the insulating vacuum along with deteriorated superinsulation & instrumentation. Root cause diagnosis of the problems and the repair methods are described along with the measures used to qualify the vessels and piping within the Laboratory's Pressure Safety Program (mandated by 10CFR851). The extraordinary refrigerator operational methods used to utilize the obsolete cryogenic apparatus gathered for the off-line, single coil tests are described
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