Testing

From: David J. Thompson [djt@gamma.gsfc.nasa.gov]
Sent: Friday, March 16, 2001 9:16
To: ritz@milkyway.gsfc.nasa.gov; Bob Hartman
Subject: Testing
GLAST ACD Test and Calibration Plans

Preliminary Outline - March 16, 2001

Environmental testing in blue. Functional testing in green.

Parts/Subassembly Level

Parts selection/screening
Qualification testing of subassemblies - vibration, thermal vac

Functional testing of subassemblies using cosmic rays, sources

Tile assemblies for DAQ testing - deliver 9/02

ACD System Level

Engineering Model (non-flight parts) - build and test by CDR

Vibration/acoustics/thermal vac/static proof testing to qualification level
Rapid pump down to test venting and high voltage arcing
Functional testing with cosmic rays, sources

Flight Unit - delivery 01/04

Vibration/acoustics/thermal vac testing to acceptance level
Functional testing with cosmic rays, sources

Basic functional test - confirm all commands, voltages, currents, and count rates
Full functional test - confirm commands, voltages, currents, count rates, and PHA spectra for all tiles and all phototubes (time-consuming)

LAT Instrument Level

Mechanical Model (dummy tiles and heat loads to represent electronics) - deliver 8/03
LAT thermal balance testing

Calibration Unit (partial assembly, non-flight parts) - deliver 8/03
Beam calibrations

Flight Unit
Participate in all LAT testing and calibrations