AMS Tracker Thermal Control System TTCS

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AMS Tracker Thermal Control System (TTCS) TTCS
Progress ReportTIM-meeting, 02 February,
2006 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,
Miao, J. Zhang et al. MIT-team V. Koutsenko,
Cai, A. Lebedev

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Presentations

• TTCS overall system design progress, component
  progress safety issues, Johannes van Es (NLR)
• TTCS Progress SYSU activities, Zhenhui He (SYSU)
• Power budget/condenser modelling
• TTCS Test Bed progress
• TTCS Mechanics progress
• TTCE Status
• More detailed presentations during splinter
  meetings
• TTCS Accumulator during TCS H/W Status, Tuesday
  (CAST)
• TTCS Mechanical splinter, Wednesday
  (SYSU/INFN)(TBC)

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Contents

• System design
• Mechanical Design
• Component progress
• Mass budget update
• Management issues

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Main system design progress

• Design Team concensus on CO2 (TWG-meeting)
• Limited Tracker space makes CO2 the only feasible
  option
• Condenser power problem clarified and solved
  (SYSU)
• Marginal additional power needed (see SYSU
  presentation)
• Design optimisation on-going
• Thermostat control on radiator/condenser
  heaters? Safe (two-fault tolerant) design is
  feasible

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Main system design changes/improvements

• Condenser split point changed (after outlet HX)
  for optimal ground testing
• Addition of ground test accumulator heaters (not
  connected in flight)
• Condenser lines at on/off command no more Pt1000
  controlled
• Reduction of of Pt1000s for control (further
  reduction to be discussed for mass budget)
• Thermostats implemented on accumulator
• Detailing of location (end cap and/or directly on
  accu HP) See (SYSU presentation for details)

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Main system design changes/improvements

• Not shown in schematic
• Modelling effort on start-up heater sizing
• RD effort on accumulator CO2 wick configuration
• Wicking height
• Axial liquid transport testing
• Pump development and testing
• Major progress on electronics development
• Super-critical start-up testing
• Impeller improvements
• Box design detailing
• Tubing design and detailing (by INFN)

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Mechanical Design

• Accumulator mounting detailing almost finalised
• Pump I/F upto be frozen (telecon later today)
• Update structural analyses baseplate (SYSU)
• at first glance sufficient margin
• Component I/F detailing on-going

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TTCS box design
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Mechanical Design

• Tubing routing design on-going (Antonio Alvino)
• Freeze of routing paths (still without
  connections with the TTCS components)
• Design of the tube holder supports on-going
• VC rings
• Lateral Beams
• RAM diagonal struts
• Conical flanges
• More and updated details in mechanical splinter

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Heater design progress

• Heater overview finalised
• AMS TTCS subsystem Heater Specifications
  AMSTR-NLR-TN-043 ISSUE 1.1
• All heaters defined and selected
• Few design changes are still considered (See SYSU
  pres)
• 120 V heater design frozen
• Heater design Tracker radiator and condenser
  finnished

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Component Status

• Pump (PDT)
• Super-critical start-up tests performed
• Good news The pump can operate in vapour without
  damage
• Bad news No suction was observed (additional
  test requested)
• Electronically pump design on track
• I/F definition and definition of cabling harness
  is needed

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Component Status

• Valves (BE)
• Envelope available
• Electrical I/F defined
• TTCS EM testing decision point to fly without or
  not
• APS DPS (CETC)
• China Electronics Technology Group Corporation
  (CETC) is selected as supplier
• I/F definition on-going
• US standard bolt discussion

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Component status

• Evaporator (NIKHEF) (shown in Tracker
  presentation)
• FM inner rings ready
• FM outer rings ready
• All soldering finished
• Pigtails designed (analyses to be done)
• More details in Tracker presentation
• Condenser (NLR/UNIG)
• Condenser design is freeze proof
• Glue test set-up finalised, tests to be approved
  by NLR
• EM production should start with current design
• EM production to be started asap
• Condenser bracket design pending (SYSU)

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Component status

• Heat Exchanger (NLR)
• EM soldering repeated
• Waiting for testing at NLR
• QM design change agreed
• Split of two-phase part exterior to HX (to avoid
  phase separation during ground testing)

NLR Manufactured EM
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Component Status

• Accumulator (CAST)
• Accumulator development testing
• Heat pipe testing performed
• Wicking height test performed
• Liquid transport test performed
• Results show design improvements are needed but
  also show feasibility of a wick design to fulfil
  requirements
• Approach is agreed
• Additional tests will be performed
• EM Accumulator production on-going
• More details in CASTs splinter meeting
  presentation

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TTCS Mass budget update
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TTCS Mass budget update
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TTCS Mass budget update

• Implemented savings
• TTCE Electronics double count 1.5 kg
• Pre-heater re-design 0.7 kg
• Shielding pump (not needed) 0.4 kg
• Total 2.6 kg
• Possible additional savings
• Pt1000s reduction 3.5 kg
• Dallas sensor reduction 0.9 kg (to be
  discussed with Tracker group)
• Condenser re-design (- 50 kE) 2.4 kg
• Total 6.8 kg
• Rejected savings
• Reduced radiator size 2.2 kg

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TTCS Mass budget update

• Current new TTCS mass 70.3 kg
• Excluding beams!

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TTCS Management issues

• TTCS EM Testing start May 2006 at SYSU
• Test Procedures writing needs to be agreed
• Component delivery (APS, DPS, accumulator,
  condenser and pump and TTCE EM are pending)
• Box design is in progress (not finalised yet)
• First testing can be done in horizontal
  configuration
• TTCS management has been limited (start 2006)
• Needs to be resolved for reliable progress