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Introduction

Introduction. During last few years it is observed the increasing falling rate of ToF -L/R HV components CAEN system, good but old! Decision to make upgrade of the ToF HV system – right side, use leftovers as spare parts to right side CAEN solution (new system) too expensive ~150 kEUR.

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Introduction

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  1. Introduction • During last few years it is observed the increasing falling rate of ToF-L/R HV components • CAEN system, good but old! • Decision to make upgrade of the ToF HV system – right side, use leftovers as spare parts to right side • CAEN solution (new system) too expensive ~150 kEUR

  2. Introduction • Decided to make custom made distributors(~5 times cheaper!) in Belgrade • Contract signed on end of March (first phase,2 crates, 22 distributors, 15kEUR, half of system) • Waiting for the money, R&D started in June, production in July

  3. Current status All hardware finished! Working on communication and software

  4. Timetable • End of May: Put phase 2 into production (hardware) Finishing microcontroller program • End of August: Finishing hardware for phase 2 Finishing integration and PC control program • End of year: Integration with DCS!

  5. Recapitulation • June 2012 – 5 distributors returned from CAEN andat immediately returned to system • Only 3 spare • 30.7. Fail of the CAEN CRATE – replaced • 3 slot malfunctioned, at once replaced by 3 custom made distributors (leaving 3 more spare distributors) • 6.8. VTPC magnet fall, run stops for 5 weeks • 2 distributors fixed in Belgrade, 1 more replaced by custom made

  6. Recapitulation In total: For ~5.5 month of work we replace 9 distributors!

  7. Status • Replacing the rest of the old CAEN distributors in Crate 1 and 2, we will get 8 more spare distributors • Enough for another ~6 months of work! Not acceptable!

  8. Pixels statistic December 2012, Be @ 13 GeV

  9. Pixels statistic January 2013, Be @ 20 GeV

  10. Pixels statistic February 2013, Be @ 30 GeV

  11. Pixels statistic Left side: 81 dead pixels (9.1%) (~70 PMT!) 17 almost dead (1.9%) ------------------------------- 98 not working (11.0%) Right side: 20 dead pixels (2.2%) (~16 PMT!) 4 almost dead (0.5%) ------------------------------- 24 not working (2.7%)

  12. Conclusion • Right wall looking good • Left wall is “very annoying” (credits to Marek!) • For replacement of dead scintilator-PMT pixel we need Dubna knowhow! • PMT is glued to scintilator! Cannot be ”unglued”! • Perhaps make some try with MPPC chips, glued on the other side • Vadim is back to NA61, this will be a great help • Timetable?

  13. ToF Readout upgrade • ToF readout electronic suffer from the same illness as HV supply: old electronics, no replacement part, cannot be repaired • During last year we had lot of discussion how to resolve this problem • Two proposal for upgrade

  14. DRS4 Solution • Based on DRS4 chip from PSI • Basicaly very fast pulse shape recorder/analyser, 200ps sample time • Test performed during December last year show that we can reach 30-50ps resolution in real situation • Is it sufficient?

  15. DRS4 Solution • Pro - Lot of RD already done - QCD already exists (pulse shape) - Sandro will push it! - Lot of men power already provided • Contra - Price (>300 kCHF) - Resolution - Integration with existed DAQ

  16. TBR Solution • Based on FPGA chip • Design from GSI and Krakow • Claim that can achieve instrict 15ps resolution

  17. TRB Solution • Pro - Resolution - DAQ interface already developed - 256 chan per unit - Price (several times cheaper than DRS4) • Contra - Manpower for implementation to SHINE - Integration with existed DAQ

  18. ToF Readout upgrade • Lot of work needed! • Lot of problems exists: integration to DAQ, replacement of the old units, cabling, software • Not so much time!!! • Decision has to be make soon!

  19. THE END THIS IS NOT

  20. Belgrade cluster • Start working last week • Now: 64 cores in working nodes, 8TB storage • Virtualization: CENTOS, KVM, CloudStack • Virtual OS: only SLC for a moment • 400 jobs submitted, pp158, VENUS • 400 kEvents in 75 minutes!

  21. Belgrade cluster

  22. Belgrade cluster

  23. THE END NOW IS

  24. Collaboration meeting Collaboration meeting, Belgrade, May 2013

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