AMS Tracker Thermal Control System TTCS

1
AMS Tracker Thermal Control System (TTCS) TTCS
Progress, Planning, Ground test options TIM CERN
October 2008

2
TTCS presentations

• Presentations
• NLR Overall progress, Accumulator repair status,
  TTCS GSTTCS, Schedule J. van Es
• INFN/AIDC HX Condenser, transport tubing
  (presented by INFN) Elisa Laudi 
• SYSU EM Sec loop 3D testing, QM condenser testing
  Zhenhui He
• AIDC Box integration and preparations, DrJ Sun
• INFN/MIT TTCE G. Alberti /(M. Menichelli, V.
  Koutsenko/L. Accardo/A. Lebedev)

3
Contents

• Overall progress
• Accumulator repair status
• GSTTCS Ground test options
• Mini-TTCS during beam testing
• Air-cooling at KSC (alternative for beam testing)
• Cold plate investigations
• TTCS Planning Integration activities on AMS02

4
TTCS Overall Progress

• Components progress
• Evaporators
• Hydraulic connectors welding finished
  (NIKHEF/UniGe)
• Cleaning evaporators (this week A. Pauw NLR)
• Transport tubing waiting for installation
• Bending, installationwelding planned second half
  January 2008 at CERN
• Condensers (details by INFN/AIDC)
• Most critical step successfully completed
  (brazing manifolds)

5
TTCS Overall Progress

• Components progress
• TTCB Component boxes (SYSU/NLR/AIDC/INFN)
• Mechanical parts finished or in production
• Further details in AIDC presentation

6
TTCS Progress Overview

• Accumulator repair
• QM wire heater broken due to
• Brittle connectors Thermocoax wire heaters (0.5
  mm diameter)
• Also problems with pre-heater wire heaters were
  found
• Connector positioning sensitive to vibration and
  handling damage

QM location of fracture
FMs sensitive to vibration and handling damage
7
TTCS Progress Overview

• Accumulator repair decision (consultation with
  Tracker and NASA)
• Replacement of all QM and FM wire heaters by 1 mm
  wire heaters (more robust)
• Vibration proof connector location

Replace by one wire
8
TTCS Progress Overview

• Accumulator repair actions
• Accumulator heater wire design (NLR) finished
• Manufacturing copper TS saddles (NLR) 30-10-2008
• Soldering and de-soldering preparation and test
  runs (NLR)
• Heat pipe emptying, extension welding,
  vacuumizing, sealing (CAST) (finished)
• Liquid inlet tube cutting (CAST) (finished)
• De-soldering, cleaning and re-soldering of the
  wire heaters around the accumulator heat pipe
  (NLR performed at SYSU) (17-21 November)
• Heat pipe filling and sealing (CAST)
• Integration in TTCBs (AIDC)

9
TTCS Progress Overview

• Other important tasks
• TTCS EM testing (see presentation Zhenhui He)
• TTCS functional check Embedded S/W development
  (presentation Gabriele Alberti)
• MLI detailing on-going by CGS NLR
• TVTB LSS test preparations

10
TTCS Progress Overview

• Other important tasks
• Dynamic Model to test TTCE S/W (by D.C. Mo)
• Debugged and improved the dynamic model by INFN
• Added/Implemented accumulator model
• Model is running real time
• Comparison with Sinda-Fluint is acceptable,
  however better verification with exact similar
  boundary conditions needed
• Generation C tested
• Next steps
• Dynamic model I/F definition with TTCE
• Generation C code
• TTCE S/W verification

11
TTCS ground test options

• TTCS cooling during beam testing
• Beam test prior to TV-testing ? Mini TTCS only
  using evaporator and transport tubing
• TV-test prior to beam test ? TTCS is integrated
  and closed during beam testing
• Option 1 Air cooling but limited Tracker power
  so cooling air above dew-point is
  sufficientAdvantage Simple design, little
  impact on Flight H/WDisadvantage 50 of
  Tracker power
• Option 2 Cold plate attached to Tracker
  radiatorsAdvantage Larger power Disadvantage
  More complex (contact pressure, sensitive paint)

12
Mini TTCS during beam testing

• Mini TTCS

• Full power Tracker possible
• Tracker operation set-point at 20C to
  23 C
• Easy implementation

Connection points mini-TTCS
13
Mini TTCS during beam testing

• Mini TTCS as used during Tracker testing
  (re-use 75)

valves deleted (not needed)
Clean pump Procured and available at NLR
Ground Support TTCS adaptations
14
TTCS ground test options

• TTCS cooling during (beam) testing, ESTEC KSC
  tests
• Option 1 Air cooling but limited Tracker power
  so cooling air above dew-point is
  sufficientAdvantage Simple design, little
  impact on Flight H/WDisadvantage 50 of Tracker
  power

15
TTCS ground test options

• TTCS cooling during (beam) testing, ESTEC KSC
  tests
• Option 1 Air cooling but limited Tracker power
  so cooling air above dew-point is sufficient
• Actions taken
• High set-point 26 C test to increase the
  possibility of higher air cooling temperature
  (see SYSU presentation)? yes possible
• Calculations (SYSU) with reduced power show
  feasibility. However still full radiator surface
  is required.
• DT condenser to radiator surface (of course
  not a uniform straight forward answer ? further
  research)

16
TTCS ground test options

• TTCS cooling during (beam) testing, ESTEC KSC
  tests
• Option 2 Cold plate attached to Tracker
  radiatorsAdvantage Full power operation
  Disadvantage More complex mechanics and
  facility to avoid condensation
• Actions taken
• Paint sensitivity test (G. Ambrosi)
• To be done
• Investigate contact pressure possibilities in
  combination with interface filler

17
TTCS Planning