Document: LAT-PR-01967Section 15 Manufacturing

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GLAST Large Area Telescope Manufacturing Jerry
Clinton Chief Manufacturing Engineer Stanford
Linear Accelerator Center jclinton_at_SLAC.stanford.E
DU [phone]
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Manufacturing Overview

• Anticoincidence Detector manufactured by GSFC
• Tracker Towers manufactured by INFN/UCSC/Plyform/M
  ipot
• Calorimeter Module manufactured by NRL/CEA/IN2P3
• DAQ and Tracker electronics manufactured by
  SLAC/Teledyne
• Grid Box Assy. manufactured by SLAC
• Radiators manufactured by Lockheed-Martin

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Requirements

• 433-MAR-001 GLAST LAT Mission Assurance
  Requirements
• LAT-DS-00039 GLAST LAT Performance Assurance
  Implementation Plan
• Assemblers trained and certified to workmanship
  standards NASA-STD-8739.1, 8739.2, 8739.3, 8739.4
  and 8739.7
• Assembly and test performed in Class 100K clean
  room compliant with LAT-MD-00404
• Production Readiness Reviews

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Production Readiness Review

• Conducted by IPO
• Required before start of flight manufacturing
• Iterative reviews to support subsystem delivery
  schedules
• Review of processes, specifications, drawings,
  parts and materials lists
• Documentation released for manufacturing
• Processes verified on prototype or
  engineering-model hardware
• EEE parts on Parts Identification List and
  approved for the specific application
• Raw materials on Program Approved Materials List
  and approved for the specific application

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Production Readiness Review Cont.

• Personnel training and certification
• Facilities readiness MGSE, EGSE, ESD controls,
  compliance with LAT-MD-0404
• Parts, materials, tools, test equipment, shop
  supplies, etc. on hand and in place at start of
  manufacturing

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Procurement Process
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Material Receiving
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Basic Manufacturing Flow
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Electronics Manufacturing Flow
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Material Control

• Must be a closed loop control process
• Parts/materials received from suppliers into
  flight stores
• Parts and materials issued to work orders for
  assembly
• Finished assemblies returned to stores
• Process repeats for next higher assemblies

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Non-Conforming Material Handling

• All non-conformances are documented on a
  Non-Conformance Report (NCR)
• Identifies non-conforming item
• Describes non-conformance
• Describes environment unit was in at the time the
  non-conformance was discovered
• Implemented using REMEDY
• Work stopped until NCR is reviewed and
  dispositioned by Material Review Board
• Chaired by Quality Engineer
• Supported by responsible engineer, manufacturing
  engineer, and other specialty engineers as
  appropriate
• NCRs archived in a data base and kept with the
  item work order

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Spares and Repairs

• Spares listed in LAT-MD-01687, Configuration Item
  Data List
• End items delivered by Subsystems to Integration
  and Test at SLAC
• Damaged or failed end items returned to
  manufacturers for repair
• Calorimeter modules repaired by NRL
• ACD repaired by GSFC
• Tracker towers/trays repaired by INFN
• DAQ hardware repaired by assembly vendor or SLAC
  personnel
• Plan to hire qualified assemblers to support IT
• These assemblers will work with assembly vendors
  to learn hardware
• Grid Box Assembly repaired by SLAC

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Clean Room Support

• ESD-safe, clean-room lab coats
• Hair covers
• Face masks
• Shoe covers
• Gloves and finger cots
• Clean-room swabs and wipes
• Solvents and DI water
• ESD-control wrist straps
• Fastener inventory