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SoLID DAQ

SoLID DAQ. Camsonne SoLID collaboration meeting November 8 th 2013. Outline. Experiment requirements PVDIS Calorimeter trigger and readout PVDIS setup,e vent size and data rates GEM electronics SRS SIDIS event size SIDIS electronics layout MRPC electronics Budget Test stand

julian-rowe
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SoLID DAQ

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  1. SoLID DAQ Camsonne SoLID collaboration meeting November 8th 2013

  2. Outline • Experiment requirements • PVDIS Calorimeter trigger and readout • PVDISsetup,event size and data rates • GEM electronics SRS • SIDIS event size • SIDIS electronics layout • MRPC electronics • Budget • Test stand • To do list • Conclusion

  3. Experiment requirements • PVDIS • Pion contamination • Trigger rate 30 KHz max per sector • 30 independent sectors • SIDIS • Trigger rate • 60 KHz coincidence e pi • 100 KHz singles

  4. Calorimeter trigger

  5. PVDIS calorimeter readout • Need new development of SD and FADC firmware • 100 K$ for R&D and prototyping

  6. PVDIS calorimeter trigger • Send data from one sector to the neighboring sector

  7. PVDIS setup • Shower : 1830 channels • Preshower : 1830 channels • Light Gas Cerenkov : 270 channels • GEM : 4700 strips • Trigger : Shower and Cerenkov • Rate with 30 ns gate : 3e6 * 200e3 * 30e-9= 18 KHz • Rates estimate for 20 KHz

  8. Event size PVDIS • Assume 2 high energy cluster in each sector and all Cerenkov firing for each trigger • Data rates at 20 KHz = 56 MB/s

  9. SRS

  10. SRS • Switch SRS • Cheaper per channel cost • Less crates • Higher data transfer rate

  11. SIDIS • Detectors • Forward • Calorimeter preshower + shower • Scintillator • Light Gas Cerenkov • Heavy Gas Cerenkov • Large Angle • Calorimeter shower • Scintillator • GEM • 5 planes

  12. SIDIS, J/Psi requirements • SIDIS : 60 KHz coincidence e/pi, 80 KHz singles • J/psi : triple coincidence e , e+,e- • Plan • FADC integrated readout • GEM with deconvolution one sample readout • In theory should be able to reach 100 KHz

  13. Event size SIDIS • GEM occupancy with deconvolution : 1.2 KBytes • Other detectors : ~ 1.9 KBytes • Data rate 100 KHz with 3.1 Kbytes event size 310 MB/s Could take more but need reduce with L3

  14. SIDIS, J/psi • Calorimeter electron trigger as PVDIS • Send cluster number to GTP • Coincidence • APV25 : on chip convolution one sample readout • FADC readout : zero suppress 10 % MIP for calorimeter readout time and integral • Might consider waveform for SPD and preshower depends on final trigger rate

  15. SIDIS trigger • Electron trigger • Shower + LC + SPD + MRPC : Forward angle • Shower + SPD : Large angle • Pion trigger • Shower + HC + SPD • Shower • J/psi trigger • Shower ( 3 clusters above threshold ) + LC + SPD + MRPC

  16. SIDIS electronics layout

  17. Electronics layout SIDIS

  18. FADC occupancy

  19. MRPC • Question about electronics and funding • Solution in house / commercial electronics • 2 input registers : 2K$ • 4 V1290 CAEN High Resolution TDC : 11 K$ • Price per sector : 44 K$ • Total price : 1.4 M$ ( only readout no FE ) • Funding request from Tsinghua University • Either use this solution or develop custom module

  20. DAQ cost estimate

  21. Additionnal cost • 100 K$ R&D prototyping SD • 50 K$ shield house electronics • Total around 3 M$

  22. L3 Farm • Base on Hall D estimate • Driven by PVDIS • Assuming 30 KHz • 390 cores for non tracking option • 1500 cores with tracking

  23. Operation costs • Cables : 300 K$ • Racks : 15 K$ • Tape : 600 K$

  24. Test stand • Test trigger logic • Test max trigger rates • Test electronics with real detector signals • Test GEM readout max performance • 4 FADC, 1 CTP and 2 VXS crates • 1 SRS from UVA and 1 INFN MPD readout

  25. Things needed for director review • Tes trigger logic and FADC performance • PVDIS • Occupancy in Calorimeter • L3 data reduction scheme • SIDIS trigger rates • MRPC, LGC, HC , SPD simulation • Simulation digitization • SIDIS GEM occupancy from G4 • SIDIS rates from G4 simulation • MRPC development custom electronics • APV25 high rate, test with SRS • L3 reduction factor and ressource needed test algorithm • MaPMT test

  26. Conclusion • PVDIS doable and cost reasonable now calorimeter rate down : 18 KHz • SRS : saves cost on crates and per channel, more performant data transfer GEM event size manageable • SIDIS most like should be able to take all single triggers by reading only integral and one sample per trigger for GEMs • Need to test at high rate

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