Tracker QA Test Station Status

29/08/2015Imperial College 2 Updated QA Scan Definition Scan definition: 1 –One 300 mm scan  r to V (1) 25 –Two 75 mm scans  r to X (2, 5) 34 –Two 75 mm scans  r to W (3, 4) –Absolute minimum required for full channel coverage QA parameters: –Triggers/step: 50k –Step size: ~27 mm –No. of steps: 28 –DAQ rate: 38 Hz –Duration: ~11 hours V W X

29/08/2015Imperial College 3 Data Acquisition Schedule TUE 30/10/07 WED 31/10/07 THU 1/11/07 FRI 2/11/07 SAT/SUN MON 5/11/07 TUE 6/11/07 WED 7/11/07 THU 8/11/07 StationAMPMAMPMAMPMAMPMAMPMAMPMAMPMAMPMAMPM Install Station:~3-4 hours QA Scan:~11 hours 5 stations scanned by the afternoon of Thursday 8 th November

29/08/2015Imperial College 4 Safety Interlock Systems (1) Power Supply: –Currently, mains equipment individually protected with circuit breakers but compressor running from unprotected 3 phase supply When power restored after blackout, mains equipment remains off but compressor restarts – potentially harmful –IC electricians asked to provide solution: New high capacity 3 phase line installed Split into ‘normal’ 3 phase and mains supplies at breaker box Blackouts cause breaker box to trip – switches off ‘root’ 3 phase supply, protecting both mains equipment and compressor N.B. Only one particular type of trip switch will work with compressor! IC electricians will provide details of setup, for replication at RAL… –New supply installed in parallel with existing one – no disruption to data taking –Work complete on Wednesday 31 st October, but intend to continue using old supply during current intensive 5 station QA run

29/08/2015Imperial College 5 Safety Interlock Systems (2) Smoke Detector: –Craig has ordered Vesda Laser Focus 250 smoke detector system Should arrive by the end of the week –Alarm signal will turn off AFEIIt power supply –IC electricians propose additional (standalone) relay switch between main 3 phase breaker box & AFEIIt PSU All electricians busy at the moment, so haven’t yet identified suitable relay (should be able to start looking by the end of the week…?) –Will also need to request Mechanical Workshop time for installation of Vesda tubing system (for ‘sniffing’ AFEIIts)…

29/08/2015Imperial College 6 Safety Interlock Systems (3) Cassette Pressure, Lid Temperature/Water Alarms: –Should just turn off AFEIIt PSU & compressor –However, in order to shut down compressor, must be wired into main switch of 3 phase breaker box Will therefore turn off all equipment (but should not be a problem…?) –Request technical documentation for alarm signals, as electricians will need to build interface control logic –Installation will most likely require significant downtime of breaker box supplies Either switch back to unprotected supply for duration of work, or move over to the new protected mains & 3 phase supplies after alarm control logic has been fitted

29/08/2015Imperial College 7 Summary Time-optimised scan pattern defined First 5 stations to be QA scanned by the 8 th of November Power supply safety interlock in place Work progressing on remaining safety interlock systems