1. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 1 Detector DAQ Status o Since CM16 o Detector DAQ software o Front End Electronics o Schedule Milestones o Summary Jean-Sebastien Graulich, Geneva

2. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 2 Since CM16  DAQ Software Training in CERN-ALICE group Completed We have been officially granted the right to use DATE  Test of Front End Electronics for TOF and EMCal Decision to use CAEN V1724, 100 MHz, 14 bit flash ADC Successful tests of the Shaper/Amplifier coupled to the flash ADC Decision to use Lecroy 4415A Discriminators available in Geneva for TOF in Phase 1.  Start working on a technical design for the Particle Trigger

3. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 3 DATE Vocabulary  LDC : Local Data Concentrator The PC connected to the VME crate via the PC-VME Interface  GDC : Global Data Collector Event Builder  Event DATE Event = DAQ Event !!! It contains data for several Particle Events (~600)  Trigger Receiver Input Register (with several inputs) receiving the signal informing the LDCs that something has happened, e.g the spill is finished and the data should be readout (= DAQ Trigger)  Event Type Tag attached to the event depending on which trigger receiver‘s input has been used.

4. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 4 DATE Readout Process  Two processes running in each LDC The readout process waits for a trigger, reads out the front-end electronics, and fills a FIFO buffer with the sub- event data The recorder process off-loads the FIFO and sends the sub- event data to one (or several) GDC over the network  Each LDC contains a set of Equipments Equipment =~ 1 Vme board (in MICE) Each equipment has its own set of routines for its initialization and readout. Adding an equipment is done without recompiling all DATE Equipment configuration data is saved in MYSQL database (but not archived)

5. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 5 DATE Readout Algorithm 5 user routines have to be implemented (XXX is the name of the equipment) ArmHwXXX Executed at the beginning of the Run Allows initialization of the board AsynchReadXXX Executed constantly even when there is no trigger Don’t use ! EventArrivedXXX Used only if the equipment needs to trigger the readout ( Trigger Receiver) ReadEventXXX That is the readout itself DisArmHwXXX Executed at the end of the Run  General algorithm for equipment readout:

6. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 6 DATE Data Format  The data sent by the equipment is just wrapped with a LDC header (+ a GDC header if used)  The data format in the payload is defined by the manufacturer of the equipment ! (we will stick to 32 bits words)  DATE Header format defined in a header file event.h This file contains all the information the offline codes needs to know about DATE Data from the equipment ->

7. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 7 FEE Tests with cosmics  Testing the CAEN V1724, 14 bits, 100 MHz Flash ADC Test similar to the one presented at CM16 for the SIS3320 Improvement: each PMT now connected to a TDC a QDC and a FADC Trigger Counter Shaper Discr. FADC QDC TDC Shaper Discr. TDC QDC FADC Test done with TOF Scintillator bar and EMCal Pmts EMCal Twisted pair Cable => new shaper prototype

8. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 8 Shaper Output Need for better tuning of baseline restorer Used for individual baseline evaluation The signal shape is still very well understood Time (sample)

9. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 9 Charge and Time from FADC  The amplitude of the shaped signal is proportional to the original charge  Very simple algorithm => Save CPU for offline analysis  Comparing MAX with INTEGRAL allows simple detection of pile up In case of pile up => Need more sophisticate algorithm 255030403545 Max ~ Q Voltage (adc ch) Time (sample) 30% Max T_th

10. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 10 Charge Resolution Double peak caused by 50 Hz structured noise on the base line (observed on the scope, also on the QDC line)

11. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 11 Charge Resolution  Very good linearity The few points off the line are Out of QDC gate signal Noise in the line Pile up (rare)  Intrinsic Resolution of FADC = 1.8 QDC channels equivalent  Better than the QDC itself = 2.4 QDC channels

12. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 12 Time Resolution  Looking at the Time difference between Left and Right Pmts  TDC is sensitive to Time Walk (and to the track angle) => Applying cuts on charge deposit in both PMTs makes the tail disappear

13. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 13 Time Correlation 4 cm wide trigger counter Slope = 1 Sigma = 455 ps Time Difference in TDC (ns) Time Difference in FADC (ns) Sigma = 490 ps  Resolution for time measurement in FADC : 210 ps Starting from 10 ns Sampling Period ! Assuming 100 ps resolution for the TDC measurement (including residual time walk)

14. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 14 Linearity  Trigger counter moved by + and - 10 cm Peak shift: TDC not linear / FADC linear Refraction Index: TDCn = 2.2 / FADCn = 1.41 Sigma: Not constant / Constant  Time difference in TDC is sensitive to Time Walk Moving the trigger detector changes the relative amplitudes in Left and Right PMTs

15. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 15 Shaper design  2 stages vs 4 stages  Output is more symmetrical with 4 stages  Components can be adjusted to reduce the full width while keeping the rise time > 4 samples The aim is to keep the width <= 450 ps so that we can record 10 samples before the signal (for the baseline measurement) and miss only one beam burst  It allows reducing the occupancy time => Reducing the level of segmentation in SW (less channels -> less $) Same Charge resolution: The 4 stages has more noise But also more gain See Roumen’s talk

16. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 16 PID FEE for Stage 1  Summary FADCV1724ShaperTDCV1290Discri LS 4415A TOF 0 40404040 TOF128282828 TOF240?40?40?40? CKOV88-- KL4242-- SW????-- TOTAL 158 (+ SW) = 20 boards 158 (+ SW) = 10 boards 108 = 3 boards + 12 ch 108 = 7 boards

17. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 17 FEE for Stage 1  We have already 10 LS 4415A in hand  Ludovico has ordered 18 FADCs and 2 TDCs  Maurizio has ordered 1 TDC  Shaper production should start soon  We should be ready to start with EMCal(KL) / TOF0 / TOF1 / CKOV  For TOF2, we miss 2 FADCs 1 TDC (actually, only 12 channels)  For EMCal(SW), we miss even the number of channels… The commercial agreement with CAEN is to buy 30 FADCs -> Min = 80 ch Original EMCal Design: 240 channels in total -> Max = 200 ch

18. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 18 Particle Trigger Technical Design  Work in Progress  The current plan is to use Lecroy Logic Unit 4516 (CAMAC) 2 in hand, 3 needed (one per TOF station) 9 available in CERN’s pool, (8 CHF/month, only reduced support) VME – CAMAC interface available for programming the logic (trivial programming) CAMAC crates available in Geneva  Time reference for the trigger is the Burst Gate Present in all trigger condition -> Time reference won’t change (same offline cuts) Discussion ongoing on the availability of the Burst Gate..

19. Dispatch Panel (in Hand) These 4 channels Going to another splitter

20. LEFT Pmts RIGHT Pmts 2 by 2 coincidence OR of 10 slabs UP and DOWN Pmts are not used for the trigger

21. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 21 Schedule Milestones  Complete Flash ADC analysis: Nov 2006 Actually assed in beginning of December BUT extended to test new shaper prototype with EMCal Pmts -> Feb 2007  DAQ Test bench including Event builder: Feb 2007 Delayed by ~ 1 month  Order Hardware for Stage 1: March 2007 Critical item: Network Switches should be ordered at the end of March Shaper production process will be launched Event builder will be ordered in April  Move DDAQ system to RAL: July 2007 Still reachable

22. MICE CM17 Feb 07Jean-Sébastien GraulichSlide 22 Summary  DATE software training Completed  FE Electronics for PID has converged to a valid solution achievable for Stage 1  DAQ test bench is late  Particle Trigger technical design progressing  We still plan to install the DAQ system at RAL in July