Thermal Control System Status Report

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Thermal Control System Status Report
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SUMMARY

• AMS configuration, weight status an schedule (M.
  Molina)
• Summary of ongoing/ completed tests  (G. Ambrosi)
• LSS studies (W.Du / ZC Zhao)
• STA status (mechanical parts production and
  radiators design) (X. Zhu/ G. Xin)
• TTCS status (J. v Es / ZC Huang / Z. He)

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TCS Definition
Tracker
Zenith

• System TCS comprises
• Main radiators
• Tracker radiators
• Cryo radiators

Radiator
Tracker
Main Wake
Main Ram
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Recent TWG activities

• Thermal chamber inspection at Terni with NSPO
  (with Dr. J.R. Tsai and Dr. S. Chen) 6 February
  2006
• Crates, XPD, star tracker, thermal tests
  supervision
• Investigation meeting at SYSU about TTCS EM
  testing 20-23 March 2006
• C. Vettore, A. Pauw, A. Alvino
• AMS Thermal modelling
• On ISS, in LSS

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AMS 3.4 vs. 4.0
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Clear anodized

• USS02 changed t/o properties (1)

MLI
Beta Cloth
Silver Teflon
Version 3.3
Version 4.0
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Clear anodized

• USS02 changed t/o properties (2)

MLI
Beta Cloth
Silver Teflon
Version 3.3
Version 4.0
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Clear anodized

• USS02 changed t/o properties (3)

MLI
Beta Cloth
Silver Teflon
Version 3.3
Version 4.0
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Pre-survey comparison

• Pre-survey (16 cases) has been done to compare
  version 4.0 with version 3.3
• Results for Upper and Lower Trunnion bridges and
  for Vacuum Case are shown

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Upper trunnion bridge temperature differences
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Lower trunnion bridge temperature differences
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VC average weighed temperature differences
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Vacuum case

• In the hottest cases the average temperature
  increases from 21C to 22C
• In the coldest cases the average temperature
  increases from 25C to 24C
• A long time transient needs to be run to assess
  the average-over-mission behaviour

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Long-time transients RESULTS
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Survey status (196 cases)

• 60 completed

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Mass budget

• Target mass for the TCS 274 Kg
• We anticipated 19 Kg saving only 15 Kg possible
• TTCS condenser not feasible
• Further MLI weight breakdown refinement
• Wake radiator and PDS baseplate redesign expected
  for June 2006

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Mass saving continuing effort

• Integrated analysis (survey)
• ONGOING
• Deatiled design of MLI
• ONGOING AT NASA FOR NASA BLANKETS, ON HOLD FOR
  THE OTHERS
• Precise determination of TTCS weight saving
• CLOSED -8.2 Kg
• Decision pending 1.7 Kg inserts in TRD honeycomb
  panel for zenith radiator fixation

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(No Transcript)
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Lower TOF Thermal Test
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TV/TB test scope

• To demonstrate the ability of equipment to
  operate when
• exposed to extreme operational temperatures
• after being exposed to extreme non-operational in
  vacuum environment.
• To test the thermal design in hot and cold
  conditions
• To verify the heater power budget and the
  thermostats performances
• To define the minimum environmental temperature
  that the non operative TOF can experience
• To validate the thermal math model (TMM and GMM)

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Temperature measurement point

• Temperature reference point inside the box at
  PMT level
• Temperature control points outside the box on
  the TOF carbon fiber outer surface

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PMT tv test (done by INFN-BO)
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thermal test profile

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TOF temperature levels

• Aging issue
• Quantitative assessment about PMTs aging (vs.
  temperature) from the supplier is missing
• Test levels agreed by TOF team
• TOF team recommends to limit as much as possible
  PMT working at the maximum temperature.
• Decision to be made
• all-test-long TOF is powered ON
• OR
• TOF is powered ON at max temp for minimum
  duration which allows functional tests

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Analysis results along beta range
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TCS schedule
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SUMMARY

• AMS configuration, weight status an schedule (M.
  Molina)
• Summary of ongoing/ completed tests  (G. Ambrosi)
• LSS studies (W.Du / ZC Zhao)
• STA status (mechanical parts production and
  radiators design) (X. Zhu/ G. Xin)
• TTCS status (J. v Es / ZC Huang / Z. He)