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Preparation for Station Acceptance Test: Rig Components & Readout System Overview

This document outlines the preparation for the Station Acceptance Test, focusing on the rig components and readout systems. The rig includes a light box, mechanical holders, and an X-Y stage with precise movement capabilities. Detailed specifications for the readout system, including data rates, configurations, and storage capacity, are provided. It also describes run types, calibration processes, and software requirements for effective data acquisition and monitoring. Key tasks and timelines for completion are highlighted to ensure readiness for testing.

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Preparation for Station Acceptance Test: Rig Components & Readout System Overview

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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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