GLAST Large Area Telescope:

1
GLAST Large Area Telescope Tracker
Subsystem WBS 4.1.4 6A Fabrication
Overview Robert Johnson Santa Cruz Institute for
Particle Physics University of California at
Santa Cruz Tracker Subsystem Manager johnson_at_scip
p.ucsc.edu
2
Tracker Production Overview
Module Structure (walls, flexures,
thermal-gasket, fasteners) Engineering SLAC,
Hytec, Italy Procurement SLAC, Italy
SSD Procurement, Testing Japan, Italy, SLAC
SSD Ladder Assembly Italy (GA, Mipot)
10,368
Tracker Module Assembly and Test Italy
2592
18
Tray Assembly and Test Italy (GA, Mipot)
342
342
Electronics Design, Fabrication Test UCSC, SLAC
(Teledyne)
648
Composite Panel Converters Engineering SLAC,
Hytec, COI, and Italy Procurement Italy (Plyform)
Readout Cables UCSC, SLAC
3
Assembly by Corporate Vendors

• SSD Ladder Assembly (Italy)
• GA Engineering (in progress)
• Mipot (PRR in April)
• Electrical tests by INFN personnel
• Composite Panel Assembly (Italy)
• Plyform (PRR in April)
• Tray Assembly (Italy)
• GA and Mipot
• Bond SSDs to panels
• Wire bond to the MCMs
• Encapsulate wire bonds

• MCM Assembly (USA)
• Teledyne Electronic Technologies
• Bond pitch adapter
• SMT soldering
• Die attach and wire bonding
• Electronics test by UCSC personnel
• Encapsulation and conformal coating
• GA, Plyform, and Teledyne all participated in
  the Engineering Model fabrication.

4
Assembly Work at LAT Institutes

• Italy
• SSD Receiving and Testing
• INFN Pisa
• INFN Perugia
• Mount MCMs onto trays (and test electronically)
• INFN Pisa
• Test finished trays and assemble into tower
  modules
• INFN Pisa

• USA
• Wafer probing of ASICs
• UCSC
• Burn-in and thermal cycling of completed MCMs
• SLAC