Quality Control

QC is taken very seriousQC Document for Tube ProductionQC Document for Module AssemblyQC Document for Installation

Graphite CoatingVisualResistivity (sides, bottom)Detailed records

WiresVisualTest sample of every spoolCapacitanceResistance/Connectivity

TubesLeak testBurn-InPlateauLong term stability(30 days)

WireholderPosition

PC BoardVisualConnectivityCold solder joints

QC at Pol. Hi. TechProfiles, Paint,Wire, Wire-holder,End-caps, PC boardsSleeves

All components pass visual inspectionAll components within mechanical tolerancesNo defects in coatingSurface resistivity within specsNo bad solder connections on PC boardPass leak test (<1 small bubble/min)Pass wire test (weigh wire segment of each spool)Pass wire tension test/capacitance within specsPass electrical conditioning test>400 V plateau in binary gasPass 30 day test

Tube accepted and sent to US

QC at Princeton and Ohio StateTubesRibsPhi - Strips

Inspection of shipping box/transport damageTube resistance and capacitance within specsPass burn-in/conditioning test for 7 daysGood signal shape>300V plateau with ternary gasCounting rate on plateau within expectationsA sample of tubes pass efficiency testPass scan testPhi strips pass conductivity test and visual inspectionModule passes 7 day burn-in test

Module accepted and sent to SLAC

QC at SLACModulesz – StripsElectronicsHV, cables

Inspection of shipping box/transport damageTube resistance and capacitance within specsPass burn-in/conditioning test for nn days

-> Action Item: Define QC procedures at SLAC

Can we create a preliminary list today?

Module installed

Full System Test at SLAC

It would be very valuable to have a complete system up andrunning at SLAC before we install the first modules into BaBar

This should include

Cosmic ray triggerSeveral modules with z- strips(Production) HV system(Production) Front-end electronicsBaBar DAQ

Should we encourage somebody to look into this?