LARP Vertical Test Facility Vertical Dewar Design, Magnet Prep And Installation Paul Kovach December 17, 2013
Outline Background information Design details Assembly sequence
Background Info Crane capacity: double hooks, 30T and 5T Hook heights: 303 IN., 30t; 324 IN. APPROX, 5T “dewar 3” = 6.1 m deep, sits 0.9 m above floor, is 710 mm inner diameter Plan assumes 4785 mm overall cold mass length
Design Details
Overall System Configuration “ILC Service Cryostat” = self-contained heat exchanger, connected to LHe supply, LN2 supply, Nash Pump, etc. Transfer Line connects the two Vertical Dewar = 24KA vapor cooled leads, 1.9K, 1 atm vessel, 4.5K LHe “thermal shield”, insulating vacuum, instrumentation, etc.
Vertical Dewar Details G-10 hanging support G-10 – SST Lambda plate Top of lambda plate to bottom of dewar top hat = 40 in. (min. LHe distance ~ 28 in.) Bolted – metal seal 1.9K-4K relief 1.9K supply 300K Inner / outer Insulating vacuum 4K liquid - gas 300K 1.9K vacuum 4.5K vacuum 4K heat shield (existing dewar) vacuum Bottom detail 4.5K vacuum
Service Cryostat Details 5 Weka cryo valves: 4.5K reservoir supply reservoir to low pressure 1.9K reservoir to 1 atm. 1.9K reservoir to 4.5K thermal shield 80K thermal shield supply ILC power leads (not used) 1.9K exhaust (Nash vacuum) 1 atm. 1.9K supply to dewar helium pre-cool heat exchanger (from 1.9K exhaust) 1.9K exhaust 1.9K heat exchanger vacuum 4.5K reservoir 4.5K
Extra slides
Assembly Sequence
Cold Mass Ready For Up-Righting Lifting Details Top Hat/ Lambda Plug Prep Fixture
Install In Wiring Stand Attaching Top Hat/ Lambda Plug Assembly Remove Lifting Ring Lower Up-Righted Cold Mass into Wiring Stand
Lower Magnet To Final Position In Wiring Stand Solder main leads Connect Hypertronics, etc. Lower Cold Mass Assembly Onto Wiring Stand
Install 1.9K vessel Into Vertical Dewar (1 time only) Existing Vertical Dewar New Vacuum Jacketed 1.9K Vessel Install 1.9K Vessel Into Vertical Dewar On Temporary Support Rings
Install cold mass into dewar Lower Magnet Into 1.9K Vessel Bolt Lambda Plug to 1.9K Vessel Connect vacuum line Connect He fill line Remove Temporary Support Ring And Lower cold mass, 1.9K Vessel Into Dewar
Service cryostat connections Install Transfer Line Vacuum Jacketed Elbow Connect 1.9K Line Install Vacuum Jacket Closure Install Heat Shield