NSPO QM J, JT, and JPD TV Test Preparations

1
NSPO QM J, JT, and JPD TV Test Preparations
AMS-02

• Presented by
• Jih-Run Tsai
• Chia-Ray Chen
• National Space Program Office
• July 2003

2
Contents

• Test Configuration
• Interfaces
• Electrical
• Mechanical
• Thermal
• Thermal Test Requirements
• Facility Status
• Pre-Test Activities
• Suggestions
• Test Windows

3
Test Configuration

• There are three crates and one box (SimDet) will
  be installed on thermal baseplate during TV test.
• From thermal cycling control standpoint, J and
  JPD crates are suggested being installed on
  separated test adapters due to different power
  dissipation.
• SimDet can be thermally isolated from baseplate
  with a Teflon block.

J
JPD
JT
SimDet
4
Electrical Interfaces

• CSIST and AMS Collaboration will use four 55 pins
  of feedthroughs (95-44 CD951 B07H 22-55PS) for
  electrical signals and two 24 pins of
  feedthroughs (DM5623-37-2-PP) for power.
• Optical fiber feedthrough will be used for J
  crate during TV test.

5
Mechanical Interfaces

• Test adapters provided by NSPO will be installed
  between crates and thermal baseplate to simulate
  the radiator.
• Cho-Therm will be used in the following
  interfaces
• between test adapters and thermal baseplate to
  enhance thermal conduction.
• between test adapters and crates to simulate
  thermal coupling of flight condition.

crate
Cho-Therm
screws
Test adapter
thermal baseplate
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Thermal Interfaces

• Test heaters and thermocouples will be installed
  on thermal baseplate, test adapter, crates inside
  and outside to control and monitor temperature
  variations during test.
• Locations of test thermocouples will be defined
  as follows
• inside and outside crates by NSPO thermal group
  based on test prediction result including
  interfaces of PCBs and case for model
  correlation.
• on chips or parts by CSIST and CERN engineers
  for temperature monitoring.

7
Facility Status

• Some maintenance on STVC LN2 piping will be
  conducted in August.
• Some software modification on TDHSHCS-II will be
  performed in August.

Thermal Data handling System Heater Control
System (TDHSHCS-II)
Small Thermal Vacuum Chamber (STVC)
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Test Requirements Temperature Profile

Temperature (Proto-flight Test Level)
Pump Down
Thermal Balance Phase
Return To Ambient
Thermal Cycling Phase


Chamber Environments Pressure?1.0x10-5 mbar



Hot non-operation (85oC)
1 hr
2 hrs Hot soak
2 hrs Hot soak
1 hr
1 hr
Hot Operation (55oC)
Transient Cool-Down
Hot Balance
Ambient
Cold Balance
Cold Operation (-25oC)
Operation (on)
2 hrs cold soak
2 hrs cold soak
Non-operation (off)
Cold non-operation (-45oC)
1 hr
1 hr
1 hr
1 hr
Turn on
Turn off
I
A
B
C
D
E
F
G
H
J
K
L
O
Q
M
N
P
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Test Requirements Thermal Control Criteria

• Thermal Cycle Testing
• The mounting feet are within 2?C of the specified
  proto-flight temperature limit.
• No mounted thermocouple is varying at a rate
  greater than 1?C/hr as measured over a period not
  less than one (1) hour.
• Thermal Balance Testing 
• No mounted thermocouple is varying at a rate
  greater than 0.2?C/hr as measured over a period
  not less than one (1) hr.
• All heater settings remain unchanged over a two
  (2) hour period which will include the 1 hour
  period outlined above.
• Temperature Transition Rate
• The temperature transition rate shall be limited
  to a rate equal to or less than 1?C/min as
  measured by the test article control
  thermocouples.

10

Pre-Test Activities

• Major tasks will be done by NSPO before J, JT,
  and JPD TV test
• Crates pathfinder TV test in progress
• MGSE (Test adapter) design and manufacture in
  progress
• Test instrumentation preparations (test heaters
  and thermocouples) materials are ready
• Thermal hardware preparations (MLI, Cho-Therm)
  materials are ready
• Pre-test predictions waiting for CGS thermal
  models (J, JT, and JPD)
• Hot and cold boundary conditions (radiator
  simulator - test adapter) ---- waiting for the
  result from CGS
• Test procedure need more information about
  functional test from CERN

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Suggestions

• In order to test AMS-02 crates more efficiently,
  some suggestions are proposed as follows
• Please check outgassing data before use them.
• (standard value lt1TML, lt0.1CVCM)
• Please wear gloves in crate handling processes.
• Please clean all bolts with IPA before using
  them.
• If there is any contamination on crate during
  environmental test, please clean the crate before
  shipping to NSPO.
• Please provide material data sheet for each
  crate.
• ESD should be avoided (wear wrist-stats at all
  time during crate assembly).
• Based on the request from AMS-02 test team, hot
  cold soak temperatures will be the protoflight
  (or acceptance) temperature 1oC.

12
Test Windows

• Three test windows are allocated for AMS-02
  crates thermal vacuum tests by using NSPO test
  facility as follows

10/15/2002
1/15/2003
6/15/2003
9/30/2003
8/31/2003
11/20/2003
ROCSAT-2 Mission Simulation and Launch Site
Operation
ROCSAT-2 TV Test and related activities
1st test window for QM test
2nd test window for QM test
grace period
12/31/2003
08/01/2004
03/15/2004
11/20/2003
12/31/2004
05/15/2005
ROCSAT-3 Spacecraft IT (5 satellites)
ROCSAT-2 Early Orbit Checkout
3rd test window for QM FM test
Possible range for FM test (depending on
ROCSAT-3 IT activities)