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STaRBoard

STaRBoard. Jamal Rorie 5/09/06. Data Collection. PMT. PMT. 1:3 Splitter. 1:3 Splitter. Leading Edge Lo Level Discriminator. Leading Edge Hi Level Discriminator. Leading Edge Hi Level Discriminator. Leading Edge Lo Level Discriminator. Mean Timer. TDC. ADC. ADC. TDC.

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STaRBoard

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  1. STaRBoard Jamal Rorie 5/09/06

  2. Data Collection PMT PMT 1:3 Splitter 1:3 Splitter Leading EdgeLo LevelDiscriminator Leading EdgeHi LevelDiscriminator Leading EdgeHi LevelDiscriminator Leading EdgeLo LevelDiscriminator Mean Timer TDC ADC ADC TDC

  3. Timing Scheme • Hi level - event trigger • Lo level - higher time resolution

  4. Timing Scheme (cont.) • Current System: stretch interval between TOFFEE “T” pulse rising edge and rising edge of a reference signal. Measure stretched time. • New System: use HPTDC in high resolution mode to time the rising edge from the TOFFEE “T” pulse. • 4 TDC channels take measurements, result is interpolated. • More info on high resolution mode in HPTDC Manual on pp 7-8.

  5. Q Measurement • Current System: send directly into LeCroy 1877S, convert to time • New System: send to ADC block on STaR • Shaper • LABRADOR3

  6. Readout Scheme Event trigger received by STaR Logic request to HPTDC HPTDC polls for “hit” around requested time HPTDC sends data, Logic queries LAB3 No HPTDC data,Logic doesn’t query LAB3 Hit No Hit LAB3 sends data COPPER I/O carries data downstream

  7. COPPER • COmmon Pipelined Platform for Electronics Readout • One standardized card can control up to 4 boards

  8. STaR Layout HPTDC COPPER 16 HPTDC XC3S2000 CLK LAB3 16 COPPER LAB3

  9. The STaR Board

  10. ADC Block • LABRADOR3 • 12 bit data readout • Shaper to elongate signal • Originally 3 GSPS • Now 100-300 MSPS

  11. LAB3 header format under discussion Readout

  12. Shaper Test Elongation good Standard delay confirming Testing

  13. Tasks • Currently • Firmware development • Ahead • Software development • Firmware testing • Finalization • KEK observations (mid-July)

  14. Online Documentation • http://www.phys.hawaii.edu/~jrorie • Schematics • Updates • Code • Datasheet

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