Review

1
LAT Environmental Test Planning Meeting 14-16
March 2005 Thermal-Vacuum Testing
Martin Nordby Jack Goodman
2
Agenda

• 830 am - 900 am      Thermal panel design (Jack
  Goodman)
• Thermal design concepts
• 900 am - 915 am      Thermal panel design
  (Martin Nordby)
• Heating/cooling electrical and gas schematics
• Power and feedthrough tally
• 915 am - 945 am      EGSE cabling (Rich
  Bielawski)
• Cabling schematic, feedthrough pin-outs
• Thermal sensor cabling
• Routing and wrapping
• 945 am - 1015 am    MGSE (Martin Nordby)
• Chamber configuration
• Support stand design concept
• Cable routing and support
• 1015 am - 1030 am    Thermal data acquisition
  (Jack Goodman, Mike Van Herpe)
• Data flow
• Communication between chamber DAQ and LAT EGSE
• 1030 am - 1115 am    Thermal-Vacuum test
  sequence walk-through (Martin Nordby)
• 1115 am - 1200 pm    Action Item List Status
  (Martin Nordby)

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Thermal Panel Design
4
Thermal Panel Cooling Schematic

• Cooling circuits use boil-off LN2 system
• Radiator Y/-Y circuits need to be sized for
  transient testing
• Fast cool-down to simulate eclipse

Cooling Zones
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Thermal Panel Electrical Heating Schematic

• Each zone shown is computer controlled
• Radiator Y and Y zones are independently
  controlled, and need 4-5 kW total power per
  Radiator to provide transient test heat-up
  capability

Heater Zones
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Heater Power Requirements and Feedthroughs
7
EGSE Cabling and Feedthroughs
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Thermal-Vacuum Test Test Configuration
Port plate for LAT elec, gas feedthroughs
LAT rolls into chamber on floor
LAT on Test StandOriented Horizontally
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Thermal-Vacuum Test Test Configuration
Chamber Plan View (PDF file)
SIIS, thermal sensor cable routing
Front View with Chamber Cut Away
View from Inside Chamber
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Thermal-Vacuum Test MGSE Concept
Upper extension beams are used for lifting LAT
into place, then removed
Radiators mounted to Test Stand in vertical
orientation
Extension beams double as support legs
LAT on Test Stand(Horizontal Configuration)
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Thermal-Vacuum Test MGSE Concept (cont.)
ACD Sink Plates on an independent support frame
Possible hydraulic assist for rotating detaches
for T-Vac
LAT on Test Stand(Horizontal Configuration)
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Thermal-Vacuum Test Mechanical Issues

• Known issues to be worked
• Trapped air volumes contamination issue
• Thermal stability of support how level will it
  keep the LAT and what is requirement
• Sink panel design and support 5 ACD, 3 SC, 2
  Rad
• Requirements list
• Leveling what is accuracy and precision needed
  for heat pipes any stability reqs?
• Test Stand allowed temps temperature range that
  Test Stand may see
• Allowed parasitic conduction and radiation
  to/from Test Stand and other MGSE

13
Thermal-Vacuum Test MGSE Action Item Status

• T102, T114 clearances in and around T-Vac
  chamber and chamber dimensions
• Chamber model delivered to SLAC and incorporated
• Clearance evaluations are in the works
• T110, T130, T137, T138 define leveling
  requirements for heat pipes, any muon surveys
  inclinometers needed?
• No progress
• T118 MGSE temperature requirements
• Agreed to keep Test Stand in a -1020 degC
  range
• Still working details of heating/cooling/isolation
  needed
• T126 agree to structural supports of LAT in
  T-Vac
• Test Stand provides flight-like structural and
  thermal interface for LAT
• Eliminated all options using GPR
• T127 develop T-Vac STE list
• Started list of MGSE, but not complete

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Thermal Data Acquisition
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Thermal-Vacuum Test Sequence Walk-Through

• Transport to Thermal-Vacuum Chamber
• Open door of T-Vac chamber and set up temporary
  trolley supports and rails. Roll out trolley
  from inside T-Vac chamber
• Move LAT on Test Stand in horizontal
  configuration on Cart to T-Vac chamber.
• Lift LAT on Test Stand and set down on trolley.
  Secure on trolley and break rigging.
• Move GN2 source and re-route hoses up onto
  trolley.
• Test Preparation
• Install EGSE crates and run outside cabling from
  EGSE crates and chamber DAQ to chamber port
  plates. Make connections to outer feedthroughs.
• Connect internal EGSE cabling from inner
  feedthroughs on port plates.
• Check end-to-end continuity of all cabling and
  connections through to LAT EGSE crates and
  chamber DAQ.
• Mount remainder of specialized test equipment
  (STE), including thermal panels.
• Roll trolley into mouth of T-Vac chamber.
• Plumb chiller lines from LAT manifolds through
  port plate feedthroughs to external chiller.
  Test. Leave off.

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Thermal-Vacuum Test Sequence Walk-Through (cont.
1)

• Test Preparation
• Connect internal EGSE cabling to LAT.
• Run LAT Aliveness test.
• Mount thermal instrumentation to LAT, MGSE, and
  inside of chamber. Connect instrumentation
  cabling to inner chamber port plate feedthroughs
  and check.
• Mount ACD-XLAT and ACD-Radiator MLI blankets.
• Wrap MGSE MLI blankets around Test Stand,
  instrumentation cabling, and to patch up blanket
  open regions around Radiator-Grid volume.
• Run LAT LPT test.
• Dress internal plumbing and electrical lines in
  preparation for rolling into chamber.
• Roll LAT on Test Stand into T-Vac chamber.
• Level Test Stand to ensure that heat pipes are
  within required level.
• Re-check all plumbing and electrical lines in
  preparation for pump-down.
• Connect thermal panels to cooling source and
  connect heaters to port plate feedthroughs.
• Connect chamber test instrumentation to port
  plate connectors on inside of chamber.
• Check chamber instrumentation and
  heating/cooling.
• Pre-T-Vac Performance Testing
• Run LAT CPT test.
• Run LAT SVAC and Muon Survey tests.
• Turn off GN2 purge and remove purge lines from
  LAT and Test Stand.
• Disassemble dust tent from around LAT and remove
  from chamber.

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Thermal-Vacuum Test Sequence Walk-Through (cont.
2)

• T-Vac Test
• Close T-Vac chamber door.
• Pump down chamber
• Bake out LAT and ground support equipment (GSE)
  inside chamber.
• Hot survival Turn-On, Aliveness tests.
• Thermal-balance hot TCS Perf, LPT tests.
• Cold-survival Heater Check test, LAT Turn-On,
  LAT Aliveness tests.
• Thermal-balance cold TCS Perf, LPT tests.
• Thermal cycle hot (1) CPT test.
• Thermal cycle cold (1) CPT test.
• Thermal cycle hot (2) LPT test.
• Hot plateau Muon survey.
• Thermal cycle cold (2) LPT test.
• Cold plateau Muon survey.
• Thermal cycle hot (3) LPT test.
• Thermal cycle cold (3) LPT test.
• Thermal cycle hot (4) CPT test.
• Thermal cycle cold (4) CPT test.
• Return to ambient temperature

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Thermal-Vacuum Test Sequence Walk-Through (cont.
3)

• Transport from T-Vac Test
• Re-assemble dust tent around LAT.
• Re-connect purge lines to LAT and Test Stand.
  Turn on GN2 purge.
• Drain and disconnect chamber thermal panels from
  chiller lines. Remove panels.
• Remove ACD-XLAT and ACD-Radiator MLI blankets.
• Disconnect test instrumentation.
• Disconnect LAT EGSE cabling from port plate
  feedthroughs.
• Disconnect fly-away and other thermal
  instrumentation from LAT, Test Stand, and
  Chamber. Remove.
• Drain and disconnect auxiliary cooling lines from
  Chill Bars and X-LAT Plate.
• Roll LAT on T-Vac Test Stand out of chamber.
• Lift LAT on Test Stand off trolley. Set down on
  Cart and secure.
• Move GN2 source and re-route hoses down onto
  Cart.
• Move LAT on Test Stand back to High Bay.

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Action Item List Status
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