GLAST LAT Silicon Tracker Marcus Ziegler APS April Meeting 2004 1 The GLAST Silicon The GLAST Silicon Tracker Tracker Marcus Ziegler Santa Cruz Institute for Particle Physics University of California at Santa Cruz GLAST LAT Collaboration [email protected]Gamma-ray Large Gamma-ray Large Area Space Area Space Telescope Telescope
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GLAST LAT Silicon Tracker Marcus ZieglerAPS April Meeting 2004 1 The GLAST Silicon Tracker Marcus Ziegler Santa Cruz Institute for Particle Physics University.
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GLAST LAT Silicon Tracker
Marcus Ziegler APS April Meeting 2004 1
The GLAST Silicon TrackerThe GLAST Silicon Tracker
Marcus Ziegler
Santa Cruz Institute for Particle PhysicsUniversity of California at Santa Cruz
First full-scale carbon-composite tracked module mechanical structure.
Thermal cycling, vacuum testing, and random vibration testing have been carried out at the tray and tower-module levels.
Results were satisfactory except that the joint between the corner flexures and the bottom tray failed at the highest vibration levels—work is in progress to reinforce the joint.
Full module instrumented for thrust-axis vibration
Bottom tray panel, electronics side
Bottom tray panel, orthogonal side
GLAST LAT Silicon Tracker
Marcus Ziegler APS April Meeting 2004 23
LAT Tracker Status and ScheduleLAT Tracker Status and Schedule
January 2002: NASA PDR & DOE Baseline Review. Present: complete the Engineering-Model tracker
module: Complete mechanical-thermal module with dummy
silicon detectors. 4 fully instrumented and functional trays.
First 2 of 18 tracker modules completed and ready for qualification testing by the end of 2003.
Final tracker modules completed by September 2004.
LAT Integration and Test until mid 2005. Launch in 3rd quarter of 2006.
GLAST LAT Silicon Tracker
Marcus Ziegler APS April Meeting 2004 24
ConclusionsConclusions
Solid-state detector technology and modern electronics enable us to improve on the previous generation gamma-ray telescope by well more than an order of magnitude in sensitivity.
The LAT tracker design uses well-established detector technology but has solved a number of engineering problems related to putting a 900,000 channel silicon-strip system in orbit: Highly reliable SSD design for mass production Very low power fault-tolerant electronics readout Rigid, low-mass structure with passive cooling Compact electronics packaging with minimal dead area
We have validated the design concepts with several prototype cycles and are now approaching the manufacturing stage.
We’re looking forward to a 2006 launch and a decade of exciting GLAST science!
GLAST LAT Silicon Tracker
Marcus Ziegler APS April Meeting 2004 25
SSD Testing or Ladder testingSSD Testing or Ladder testing
Get a plot with some stats Say how great the yield is and how important it is to have
alarge yield for space applications (can’t fix it up tehre). Has to be be good