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Preparation for Station Acceptance Test

Preparation for Station Acceptance Test. Contents Rig Readout/DAQ. Room Layout. Yellow film over the window + some yellow desk lamps. Rig Components. Light box: optical base going back to Brunel? Mechanical: Station holder – “spider” usded for tracker frame

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Preparation for Station Acceptance Test

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  1. Preparation for Station Acceptance Test Contents • Rig • Readout/DAQ M. Takahashi

  2. Room Layout Yellow film over the window + some yellow desk lamps M. Takahashi

  3. Rig Components • Light box: optical base going back to Brunel? • Mechanical: • Station holder – “spider” usded for tracker frame • Source holder, garage, patch panels to be mades • X-Y stage: delivery mid-August • 35cm x 45cm travel (allow for a garage) • 4μm precision (set by the rotary encoder) • Co57 Source: lead time 6 weeks • 1mm active diameter rod-type capsule • 111MBq activity  ~ 103compton scatteringper ch per sec • Waveguides: 5 (+ spare?) sets of 165cm:265m internal:external waveguides from Osaka M. Takahashi

  4. Readout System (Testbeam) ? ? M. Takahashi

  5. Data Rate AFEIIt (L) 512 ch VLSB (4 mem. banks) 4 x 128 ch 1 station (640 ch) VLPC cassette 1024 ch • max data for this system (1 cassette / 1 station) x (2 x AFEIIt / cassette) x (1 VLSB / AFEIIt) x (4 memory banks / VLSB) x (4 bytes * 255 words / memory bank) = 8,160 bytes / event @ ~1k Hz • data for the channels in use (640 channels = 5 memory banks) x (4 bytes * 255 words) = 5,100 bytes / event @ ~1k Hz • (150mm/1.05mm) x (150mm/1.21mm) x pi ~ 56k points to survey (?)  56k x 3ch x 10k events x 8 kbytes = 13.5 TB (no zero suppression) AFEIIt (R) 512 ch VLSB (4 mem. banks) 4 x 128 ch M. Takahashi

  6. Trigger and Software • AFEIIt can be self-triggered (modification of firmware, Paul Rubinov et al.) • Threshold at 3 p.e. • Online zero suppression? • Operation on a pc: • Stage control • Run control (start, stop, pause?) • DAQ: get data from VME  cluster finding sort  store (KEK testbeam – “UniDAQ”, D0 AFE test stand – Visual Basic) • Slow control for VLPC via 1553 (Can we use Malcolm’s code from testbeam?) • VME-PCI: which one? NI, SBS (KEK testbeam), CAEN M. Takahashi

  7. Run Type • Pedestal run (check noise) • Readout continuously with fixed clock cycle in absence of beam • ~1k events? • Calibration run (check gain?) • Use LED (~525nm) to inject light into the patch panel connectors?  require defined repeatable pulses • Use normal trigger • ~1k events? • Source scan run • Move Co-57 source over the station • Pause after each “row” to allow for data management? • Trigger with 3 p.e. threshold pause position M. Takahashi

  8. Readout Checklist M. Takahashi

  9. Outlook • Rig: ready by when station 5 assembly completes (Sept) • Readout: depends on the availability of the components… • set up the “environment” • further planning for the software (DAQ, control, monitoring) and calibration M. Takahashi

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