04 Feb 03 Shutdown Activities Cryostat warm-up –Dilute contaminates Use purer helium on cooldown –Thermal stress test for cassettes –Move cassette from.

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Presentation transcript:

04 Feb 03 Shutdown Activities Cryostat warm-up –Dilute contaminates Use purer helium on cooldown –Thermal stress test for cassettes –Move cassette from slot 102 to slot 101 –West cryostat at 6.5K (was 6.3K) –East cryostat at 6.1K (was 5.5K) LED pulser upgrades FPS waveguide studies and moves CPS mapping studies Readout Firmware Updates –SEQC/SEQ for tick –AFE for tick, clockgen, and 1553 –High rate scanning tests Trigger –Hardware upgrades Transition boards Power supplies –Firmware upgrades –Continuing commissioning/testing FPD “cassette” installation Installation of table top between cryostats

04 Feb 03 Thermal Stress Test Warmup began 13 Jan Most cassette module heaters started turning on about 17 Jan after 1800 Cold block temperatures rising at about 0.4K per hour Turned off on 19 Jan at about 1800 Roughly 38 hours at full heater power of 1.6 watts per cassette Cold blocks averaged about ~322K Isotherms estimated to reach ~325K Hybrid assemblies oven cured at 339K 8 fiber plug assemblies cleaned at 308K Polystyrene deformation temp 355K Visual inspection of assembled modules reveals no surprises Lost contact with 13 heaters and 2 temp sensors VLPCs remain sensitive to light

04 Feb 03 To Be Studied Continue testing seq scanning Between stores occupancy Split peds Pedestal variation versus tick number Check status of pdaqexamine results –Tick –Data integrity –DB4/5 FPD calibration Smoke detectors on platform –test and optimize smoke detectors

04 Feb 03 To Be Addressed? Complete installation of DB4/DB5 1A2 download problems New VRBC firmware CPS personality –CPS stereo installation –CPS axial development/installation LED pulser –Additional pulser boards –Remote control for 5V power –Software enhancements –Address coupling between boards CPS link issues Optimize AFE installation Alarms updates –Invalid data Individual pixels that suffer from breakdown Crate x53 VRBC replacement

04 Feb 03 To be Addressed? Enclose back of rack PC19 Power supply issues –PS-2-B/+33V readback problem (151969) –measure backplane voltages? –calibrate Vicor voltage readouts? –separate CFT+PS from CAL BLS supply swaps AFE cooling enhancements? –Double wide air dams for special locations –tighten ductwork –Air filter retainers? Enhance protection of LVDS cable plant –LVDS strain relief? Close-up –Verify bayonet installations –Verify AFE map and SEQ fibers –Replace AFE fan filters LED studies