| Autor: |
Ballard, Joshua, Biallas, George Herman, Brindza, Paul, Carstens, Thomas, Creel, Jonathan, Egiyan, Hovanes, Martin, Floyd, Qiang, Yi, Spiegel, Scot, Stevens, Mark, Wissmann, Mark, Wolin, Elliott |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 6/8/2012, Vol. 1434 Issue 1, p861-868, 8p, 1 Black and White Photograph, 6 Diagrams, 2 Charts |
| Abstrakt: |
Thomas Jefferson National Accelerator Facility (JLab) refurbished the Large Aperture Solenoid Spectrometer (LASS) [1], 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 JLab for the Glue Excitations Experiment (GlueX) [2]. The coils, built in 1971 at Stanford Linear Accelerator Center (SLAC) and used a second time for the Muon decays into Electron and GAmma ray (MEGA) Experiment [3] at Los Alamos, had electrical shorts and leaks to the insulating vacuum along with deteriorated superinsulation and 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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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