1. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 1 DDAQ Hardware Architecture o General Architecture o Tracker Baseline o TOF Baseline & Options o EmCal Baseline & Options o Trigger Baseline o Summary Jean-Sebastien Graulich, Geneva

2. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 2 DAQ Architecture Trigger distribution Optical link Online Monitoring TrackerEmCalTOF Trigger + Ckovs Ethernet Linux PCs GigaBit Switch Run Control Event Builder Online Storage VME Crates Remote Storage

3. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 3 Hardware Consequences  PCs are sitting in the MICE LCR  -> VME crates are also sitting in the MICE LCR Cable transmission of Analog Signal or Digital Signal

4. MICE layout Drawing by Tony Jones

5. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 5 Tracker  Sensors: VLPC  Front End Electronics (without AFE-t): Analog to Digital: AFE II boards sitting on the cryo-cooler Digital Data Buffer: VLSB (512 ch/module, 4 modules/cryo-cooler)  Number of Channels 2 x 4096 ADC

6. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 6  Tracker Connection Scheme (half a tracker) 4 VLSB Boards in VME Crate MICE LCRMICE HALL 1 Cryo-Cooler 4 AFE Boards Fibers from VLPCs Digital Signal 27+x m (Tracker 1) or 12+x m (Tracker 2)  Question: Where is the AVNET card located ? MIL1553

7. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 7 TOF Baseline  Sensors: TOF0: Hamamatsu R4998 TOF1 and TOF2: R4998 or R7761 (depending on Magnetic field shielding) R4998

8. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 8 TOF Baseline  Front End Electronics: Constant Fraction Discriminator CAEN V812 (16 ch, ECL output) TDC CAEN V1290 (32 ch, ECL or LVDS Input)  Number of Channels 112 TDC (48 + 32 + 32) No ADC in the Baseline

9. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 9 TOF Baseline  TOF Connection Scheme (1 Station)  Question: Is CFD going to be precise enough ? See other options 3 CFD in VME Crate BNC Cable (RG213) Trigger Logic MICE LCRMICE HALL 48 PMTs 1.5 TDC in VME SHV Cable HV Power Supply 30+x m (TOF 0) or 27+x m (TOF 1) or 12+x m (TOF 2)

10. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 10  Timing is affected by the signal amplitude  2 Usual Solutions: Use Constant Fraction Discriminator (CFD) Measure amplitude and correct TOF Options Time Walk Time over threshold Thresh. Time Walk Correction Example from Harp

11. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 11 TOF Options Option 1. Constant Fraction Discriminator (CFD) The time walk is corrected automatically in the discriminator Threshold value depends on the amplitude  Advantage: Easy Cabling and No ADC  Drawback No information at all on the charge (Energy Deposit)  Cost: TDC +~ 125 EUR/ch (CFD) PMT CFD BNC Cable TDC Trigger Logic

12. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 12 TOF Options Option 2. Measure the Charge with a QDC  Advantage: More Precise and Good Charge Measurement  Drawback General MICE ADC problem (No suitable QDC exists yet!) Requires Splitters More cabling  Cost: TDC +~ 125 EUR/ch (DISC) ~ 200 EUR/ch (QDC) ~ Delay Cables (~20 m/ch) (Assuming free splitters) Gate Signal PMT DISCRI Cable Delay TDC Trigger Logic Splitter QDC BNC Cable

13. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 13 TOF Options Option 3. Measure the Charge with any available Solution  Same Advantages and Drawbacks as 2.  Cost: TDC +~ 125 EUR/ch (DISC) ~ ??? EUR/ch (ADC) ~ Delay Cables (~20 m/ch) (Assuming free splitters)

14. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 14 TOF Options Option 4. Measure the Charge with Time Over Threshold Principle  Advantage: Easy Cabling and Charge Measurement (not linear though) Good Precision for Time Walk Correction  NINO = ASIC developed by CERN/MIC for Alice TOF Discriminator with ToT “proportional” to the Charge (at low amplitude) Proven technique, providing 50 ps resolution (IEE TNS Vol 51-5 (2004) 1974-1978) Very Cheap: 2 EUR/ch  Drawback Requires Board development !  Cost: TDC +Discri. board production (~50 EUR/ch) PMTNINO TDC Trigger Logic Width ~Charge Rising edge + Trailing edge Time Measurement

15. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 15 EmCal Baseline  Sensors: Hamamatsu R1355 (100 in hand, Ludovico is trying to find the other 140…) Modified for differential output (100 Ohms)

16. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 16 EmCAl Baseline  Front End Electronics: Splitters Discriminators TDC: CAEN V1190 (128 ch, ECL or LVDS input) ADC: No Baseline defined yet  Number of Channels 240 ADC 120 TDC in the Baseline Time information is useful for Hit Position information in the direction // to the slab Suppression of muon decay background (the muons are stopped in the EmCal and ready to decay when the next muon arrives, disturbing PID) -> My personal feeling: TDC needed for all the channels

17. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 17 EmCal Baseline  EmCal Connection Scheme (Half EmCal) Twisted Pair Cable MICE LCRMICE HALL 120 PMTs Splitter SHV Cable HV Power Supply 12+x m 4 Discri in VME Charge measurement 1 TDC in VME Transformer Del ay

18. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 18 EmCal Options  Transformer Needed to adapt the differential output of the PMt (twisted pair, 100 Ohm) to the Coaxial (Lemo, 50 Ohm) of the Splitter.  Splitter It is possible to reuse active splitters developed in Sofia for HARP. 200 channels available If we have enough charge, the transformer can also be made as a passive splitter with 1 differential input and two coaxial ouputs.

19. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 19 EmCal Charge Measurement Options Option 1. Conventional gated QDC  Advantages Familiar, proven design Standard VME board, well documented Support from the company (CAEN), the equipment have a long live after MICE  Drawbacks The module does NOT exist yet, prototype could be delivered at the end of the year  Cost Transformers + Discriminators (125 EUR/Ch) + TDC ( 60 EUR/ch) + QDC (200 EUR/ch) + Delay Cables

20. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 20 EmCal Charge Measurement Options Option 2. QIE (TeV IPM)  Advantages Probably no need for delay cable The transformer can probably be included in the front end board (if we re-layout the board…) Could be used for TOF (or CKOV) charge measurement  Drawbacks Development Risk Not VME readout, makes the DAQ more tricky. Probably OK but who knows…  Cost + QIE FEB (??? EUR/ch) + PC BC (??? EUR/ch) + Discriminators (125 EUR/Ch) + TDC ( 60 EUR/ch)

21. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 21 EmCal Charge Measurement Options Option 3. 200 MHz Flash ADCs  Advantages No Splitter, no delay, no discri, no TDC ! Cabling very easy Equipment has a long after MICE life  Drawbacks Transformer -> Shaper Time resolution ?  Cost Flash ADC (450 EUR/ch) + Shaper ( ??? EUR/ch) + VME Crate (6 kEUR) 2 ns rise time Shaper V thr t thr >30 ns rise time If we can fit the rising edge, time resolution can be much higher than the 5 ns of the sampling rate.

22. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 22 Readout Trigger Baseline  6 Event Types: Normal Event (RF ON or RF OFF) Start of Spill make sure the DAQ is ready for Normal Event End of Spill should Contain the relevant MCM data Empty Event (Pedestals) Pulser Events Cosmic/Source Events  1 trigger receiver input per Event Type  1 trigger receiver output per Event Type (busy) + 1 common  Trigger receiver is a simple VME IO Register (4 kEUR/Unit)

23. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 23 Particle Trigger Baseline  3 Particle Trigger conditions for Normal Events Beam: Burst x TOF0 Timing given by TOF0 Upstream: Beam x TOF1 Timing given by TOF1 Traversing: Upstream x TOF2 Timing given by Upstream TOFn is defined by a twofold coincidence of the OR of the 12 (8) slabs of a single layer  Should be possible to add Traversing Muon, using EmCal information  If it’s really only these 4 conditions, there is no need for PLU. One simple I/O register is enough Option: CMAC PLU (available in Geneva). Requires CAMAC-VME or CMAC PCi Interface  For Empty and Pulser Events, the particle trigger is generated by the DAQ system  For Cosmic Events, the particle trigger is set up locally by the subsystem who wants it

24. DAQ WS02 Feb 2006Jean-Sébastien GraulichSlide 24 Summary  Tracker Baseline has to be updated for AFEt  TOF Baseline is well defined and several options will be tested  EmCal Baseline is not clear (Charge measurement)  Trigger Baseline is well defined, no problem expected there