AMS 02 THERMAL CONTROL SYSTEM Status report

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AMS 02 THERMAL CONTROL SYSTEMStatus report
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OPEN ISSUES FROM THE JANUARY TIM1) TRACKER
RADIATOR2) ZENITH RADIATOR
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Flat Radiator (1.6 m2) Jan 2003
WAKE
RAM
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Flat Radiator (78 area)
WAKE
RAM
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Flat Radiator (78 area)
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TRACKER RADIATORCDR BASELINE (78 area)
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Tracker radiators for CDR

• Area1.26 m2
• Mass2 X (13 Kg 5.5 Kg for the brackets)
• 2 condensers per radiator
• Tracker nominal dissipation 144 W (was 192 W)
• Nominal mass flow rate 3 g/s
• Pre-heating power 50 W

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Curved Radiators
WAKE
RAM
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Curved Radiator
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Beta 0-2-101_hot
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Beta 75-15-20-15_hot
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Zenith radiator
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CRYOS radiator 4.8 sq(m)
CRYOS radiator 4.1 sq(m)
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Zenith radiator

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6 Samples
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Radiator Position Relative to AMS02 Coordinate
System (Position is presently 1613,3 mm. Should
be 1600 mm)
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MAIN RADIATORS
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Main radiators MID BRACKETS
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Softer mount larger enforced
displacements Stiffer mount
smaller enforced displacements
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MID BRACKET CDR

• Current design shows negative margins
• Updated FEM model was sent to LMSO to generate
  new I/F displacements (current loads are based on
  out-of-date model and could be too cconservative)
• Direct attachment to the crates columns under
  evaluation

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MID BRACKET CDR

• Current design shows negative margins
• Updated model was sent to LMSO to generate new
  I/F displacements (current approach too
  conservative)
• Direct attachment to the crates columns

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Heat Transfer Areas between CRATES and Face Sheet
WAKE
RAM
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Heat Pipe Layout CRATES RAM Radiator
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Heat Pipe Layout CRATES WAKE Radiator
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RECOMMENDATIONS

• To improve the thermal perfomance of the
  radiators vertical heat pipes will be considered.
• This choice is partially affecting the
  possibility to test the system on ground
• hottest levels will not be tested in
  Thermal-Vacuum test

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TURNING ON AMS (activation sequence)ANDHEATERS
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Heaters architecture
WAKE
RAM
Zone heaters 7
Zone heaters 4
Zone heaters 1
Tracker Radiator
Feed A
Main Radiator
Zone heaters 8
Zone heaters 5
Zone heaters 2
Feed B
PDB
Available heater line
Rich/Ecal Radiator
Zone heaters 9
Zone heaters 3
Zone heaters 6
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AMS installation on the ISS

• AMS is removed from Shuttle cargo bay by a
  robotic arm.
• During the transfer phase to the ISS, it will be
  powered (1800 W available) through the robotic
  arm grapple fixture
• As soon as it gets installed on the ISS, the
  following activation steps are foreseen

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Heaters Operational Sequence(PDB heaters and
Zone heaters)ON THE ISS

• Start assumption we are at -40C
• 1) PDB heater ON
• 2) When T(PDB)gt-25C
• gt PDB ON (assumption 150W dissipated for
  heaters feeding)
• gt Zone Heaters ON

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Tot900W
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Tot900W
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Tot1800W
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Tot1800W
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Operational heaters

• DEDICATED HEATERS LINE (fed at 120V DC) are
  currently foreseen for some subdetectors
• TRD GAS BOX
• 6 W 50 W
• TTCS
• 100 W
• CAB?
• LOWER TOF?

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Does anybody else need heaters?

• This is the right time to ask for!

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Who is responsible for MLI?

• CGS
• Radiators backside (Tracker, RAM, WAKE, RE)
• Cryocoolers
• LMSO/NASA
• Vacuum case (external side, flanges, upper and
  lower skirts)
• Tracker upper and lower Tracker group
• TRD lateral
• RICH Mirror
• ECAL bottom
• RWTH Aachen
• TRD-zenith radiator
• Below TOF
• INFN BO
• RICH-ECAL

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Thermal ICD

• New issue of the Thermal ICD needs urgently
  inputs from the following people

A.Woering- M.Capell- M.Pohl- B.Verlaat- A.Posada
J.Ulbricht- R.Henning- L.DeFranchis- G.Viertel
W.Wallraff- P.Nemeth- P.Trampus- HPVonGunten
C.GargiuloG.Laurenti- J.L.Issler

• Goal get the inputs and release issue 5 of
  Thermal ICD by Mid May 2003
• If on the list you will be contacted

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Schedule

• Thermal CDR September 2003
• STA manufacturing start November 2003

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BACKUP SLIDES
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Weight update
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Thermal control structure mass budget(total
was 310.9 since January 2002)
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Radiator Section with Main Dimensions
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