AMS Tracker Thermal Control System TTCS

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AMS Tracker Thermal Control System (TTCS) TTCS
Progress report TIM-meeting, October 24-28,
2005 NLR-team J. van Es, M.P.A.M. Brouwer, B.
Verlaat (NIKHEF), A. Pauw, G. van Donk, T.
Zwartbol, SM. BardetSun Yat-Sen University team
ZH. He, KH. Guo, JQ. Ni, SS. Lu, XZ. Wang, XM.
Qi, TX. Li, YH Huang INFN-AMS-team R.
Batiston, M. Menichelli et al.CAST-team Z. Hou,
J. Zhang et al. MIT-team V. Koutsenko, Cai, A.
Lebedev

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Presentations

• TTCS overall progress, component progress
  safety issues, J. van Es (NLR)
• TTCE progress, thermal modelling progress, Z. He
  (SYSU)
• More detailed presentations during splinter
  meetings
• TTCS Accumulator design review CAST, Thursday
  1000-1200
• TTCS Mechanical splinter, Wednesday 1400-1600
  
• TTCS Thermal modelling meeting, SYSU, Wednesday
  830-1030

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AMS Tracker Thermal Control System (TTCS) TTCS
overall progress, component progress safety
issuesCERN, October 24-28 October,
2005 NLR-team J. van Es, M.P.A.M. Brouwer, B.
Verlaat (NIKHEF), A. Pauw, G. van Donk, T.
Zwartbol, SM. BardetSun Yat-Sen University team
ZH. He, KH. Guo, JQ. Ni, SS. Lu, XZ. Wang, XM.
Qi, TX. Li, YH Huang INFN-AMS-team R.
Batiston, M. Menichelli et al.CAST-team Z. Hou,
J. Zhang et al. MIT-team V. Koutsenko, Cai, A.
Lebedev

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Contents

• System design
• Box design
• TTCS Start-up
• Component progress
• Pump status
• Valves, APS/DPS
• Evaporator
• Condenser (freezing)
• Heat Exchanger
• OHP
• Pre-heaters
• Accumulator
• Safety status

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Issue P3.0 25-07-2005
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Issue S3.0 25-07-2005
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TTCS Box design

• Mechanical design team is reinforced by Corrado
  Gargiulo (INFN) for box design
• SYSU will perform detailed analyses on box and
  component (accumulator) design
• Progress
• Bolt sharing with a.o. main radiator bracket
  solved New draft mechanical box design available
  detailing on-going
• Components interfaces 90 finalised (see
  components)
• Preliminary stress analyses (SYSU) show
  sufficient margin

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TTCS box design
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TTCS box design
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TTCS box design
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TTCS box design
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TTCS Start-up

• Actions to tackle start-up problem decided on TWG
  meeting at NLR
• Investigate possible super-critical pump start-up
  (PDT/NLR/CAST)
• Start-up analyses of orbital cases (SYSU/CGS)
• Start-up radiator design decisions
• Investigation of severity of the problem
  (b-angles)

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Super-critical start-up

• PDT pump tests are being performed right now
• Pressure head measurements
• suction capability with air or vapour
• Design is based on the MER-rover pump which has
  been tested for 24 hour with closed valves
  (circumstantial evidence)
• Accumulator transition tests from super- to
  sub-critical state will be implemented in EM
  testing to verify wetting of the wick after
  super-critical start-up

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TTCS Start-up Modelling

• Start-up analyses have been performed reported
  by SYSU/CGS
• Assumptions
• Hot and coldest case orbital data selection by
  JS.
• AMS start-up configuration
• New box lay-out with start-up radiator
• start-up radiator white-painted
• side walls covered by MLI

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TTCS Start-up results

• Primary box
• Primary box can start-up from -75 b 60

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TTCS Start-up results

• Secondary box
• Secondary box can start-up from -35 b 75
  

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TTCS Start-up modelling

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TTCS Start-up modelling Freezing check

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TTCS Start-up summary and remarks

• Start-up radiator improves the TTCS start-up
  capabilities
• No freezing problem is present in the box with
  the start-up radiator
• Always one TTCS-loop able to start-up in AMS
  start-up configuration
• Additional analyses required for start-up in
  AMS-on configuration
• Supercritical start-up is investigated. If
  possible it is detrimental for pump lifetime
  (however a system operational decision and
  option) and makes switch between P and S at all
  times possible

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Component Status

• Pump (PDT)
• Design Review at PDT
• Electronically pump design is progressing well
• Motor design mature (proven design)
• BBM curve test performed
• pump can deliver more flow then required
• Impeller adaptations are being implemented to
  have better control
• Hall effect sensor issue solved (no Pressure
  dependence)
• Super-critical start-up testing on-going
• Planning EM delivery early December 2005

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Component Status

• Valves (BE)
• Bradford Engineering BV
• pst-file with envelope on its way (smaller
  envelope)
• Electrical interface specification update (in
  specs doc)
• APS DPS (CETC)
• China Electronics Technology Group Corporation
  (CETC) is selected as supplier
• Supplier specifications are available
• Contract to be signed next week

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Component status

• Evaporator (NIKHEF) (shown in Tracker
  presentation)
• FM inner rings ready
• FM outer ring in manufacturing
• Condenser (NLR/UNIG)
• Condenser design is freeze proof
• Condenser tubing resistant for MDP of 3000 bar at
  5 ?C
• Low-T resistant thermostats are available
• However transport tubing on conical flange can
  reach Tlt-55 ?C (freezing) after 160 hours

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Component status

• Condenser safety conclusion (TWG meeting at NLR)
• Transport tubing have to show leak before burst
• approval required from safety panel
• Advantage is that the condenser manifolds can go
  back to the old upper trunnion bridge locations
  with shorter (lower pressure drop) condenser
  lines
• Condenser design progress (NLR/UNIG)
• CTE difference between Inconel tubing and
  aluminium plate
• Glue test sample in manufacturing at CERN

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RAM
Condenser tubes supported by radiator diagonal
strut
Condenser manifold locations at the inside of the
USS upper trunnion bridges.

WAKE
Two tube support beams
Primary TTCS
Circular tube routing using outer cylinder
generic hole pattern
Secondary TTCS
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Component status

• Heat Exchanger (NLR)
• EM manufacturing upto finalisation
• QM design change agreed
• Split of two-phase part exterior to HX (to avoid
  phase separation during ground testing)
• Pre-heater design (NLR)
• Preliminary design finished
• Heaters designed and selected
• Detailed mech design on-going

NLR Manufactured EM
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Component Status

• OHP-design (NLR)
• Heaters selected
• Thermal Modelling
• Mechanical design finalised
• Structural analyses to be performed

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Component Status

• Accumulator (CAST)
• Accumulator component testing
• heat pipe testing
• test programme defined
• Accumulator EM design
• Pressure calculations
• Wick calculations
• Structural design

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Component Status

• Accumulator (CAST)
• EM manufacturing on-going
• QM design to be started
• More details and review on design in splinter
  session on Thursday

Accumulator shell
Accumulator with wick structure
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Safety Status

• Pressurised systems table almost complete
• Component information coming in APS, DPS, valves
  (TBD)
• Mechanical
• Mechanical material and component list far from
  complete (suppliers information needed)
• Structural analysis for box and components to be
  finalised
• Thermal Models are running and can provide safety
  information
• Radiator heater design updated