1. January 31, 20071 MICE DAQ MICE and ISIS Introduction MICE Detector Front End Electronics Software and MICE DAQ Architecture MICE Triggers Status and Schedule … Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

2. January 31, 20072 Introduction – MICE Description Muon Ionization Cooling Experiment (MICE): international accelerator R&D project designed to provide first demonstration of muon cooling. MICE is being built at Rutherford Appleton Laboratory (RAL) using muon beam generated from ISIS. One muon cooling lattice cell with detectors measuring muon beam emittance before and after cooling. Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

3. January 31, 20073 Introduction – ISIS Beam Structure ISIS proton spills: - 20 ms apart (50 Hz) - About 1 ms wide - Contain ~ 3000 proton bursts - Proton bursts are ~100 ns wide and 324 ns apart MICE RF cavity duty cycle limits the spill rate for MICE to 1 Hz. 324 ns 100 ns ~ 1 ms = 1,000,000 ns ●●● Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

4. January 31, 20074 Systems for MICE DAQ Target System: Titanium target inserted into ISIS proton beam produces pions which decay into muons. RF Cavities: Eight 201 MHz cavities which accelerate muons along length of MICE. DAQ: Data from MICE trackers, calorimeter, Cherenkov detectors, and time-of-flight counters will be combined to form MICE events. … ISIS proton spill → MICE target → pions,muons → MICE RF Cavities and Detectors These systems need to be synchronized for MICE data collection. Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

5. January 31, 20075 Introduction – MICE Detectors MICE DAQ acquires data from –Trackers –Calorimeter –Cherenkov detector –Time-of-flight counters With 600 kHz muon rate within 1 ms wide spill, detector data will be buffered, read out, and built into an event at end of each spill. Trackers Calorimeter Cherenkov detector Time-of-flight Counters Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

6. January 31, 20076 Front End Electronics (FEE) for Tracker Sixteen 512-channel Analog Front End II t (AFE-IIt) boards will read out data from two trackers. –Tracker data are Bitmap of tracker channels with analog charge above preset thresholds Digitization of amount of charge of each channel Digitization of time of hit with respect to fixed time –AFE-IIt boards developed for latest D0 experiment upgrade. Tracker firmware is being modified to be suitable for 600 kHz muon rate –Reduce digitization time –Make use of 4-level buffer so that digitization time isn’t dead time Expected tracker data rate ~3 Mbytes/spill. Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

7. January 31, 20077 Tracker FEE Firmware Reducing Digitization Time ~ 5724 ns: D0 implementation ~ 5670 ns: Adjust for shorter ISIS bucket period 4536 ns: TriP-t pipeline collect data during digitization 2376 ns: Zero-suppress 30 of 32 TriP-t channels 1836 ns: Reduce zero-suppression time from 2 to 1 cycle. 1566 ns: Remove cycles from set-up processes. – Assumed muon rate is 600 kHz for average time between muons of 1667 ns. – Clock period taken as 18 ns – Assume 2 out of 32 channels of TriP-t have charge data above threshold We are now starting to reduce the dead time so that it’s comparable to the average time between muons. Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

8. January 31, 20078 – Clock period taken as 18 ns – Assume 2 out of 32 channels of TriP-t have charge data above threshold Fraction of Recorded Muons for 600 kHz No Buffering 1-level Buffer t digi = 5670 ns 0.227 0.291 t digi = 2376 ns 0.412 0.601 t digi = 1836 ns 0.476 0.699 t digi = 1566 ns 0.516 0.753 Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA Tracker FEE Firmware Reducing Digitization Time and Using Buffer

9. January 31, 20079 Time-of-Flight Counters FEE Will use CAEN V1290 TDC with 25 ps LSB (least significant bit) with constant fraction discriminators Considering time-over-threshold discriminator with leading edge and trailing edge measurement allowing more precise time walk correction 60 ps resolution on time of flight measurement has been obtained in test beam. Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

10. January 31, 200710 Calorimeter and Cherenkov Detector FEE Charge will be measured with 14 bit, 100 MHz flash ADCs (CAEN V1724) coupled with RC shapers. Pulse shape analysis (after shaper) allows time resolution ~500 ps => no additional TDC needed. Cosmic ray and beam data taken and analyses underway. Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

11. January 31, 200711 MICE DAQ Hardware and Software MICE DAQ software will be built from DATE framework used by CERN experiment ALICE –ALICE = A Large Ion Collider Experiment –DATE = Data Acquisition and Test Environment MICE detectors read out over VME. Online data stream will include list of selected physical variables from MICE Control and Monitoring (MCM). Data runs will be stopped automatically when a subsystem goes into fault status or in case of connection problem. Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

12. January 31, 200712 MICE DAQ Architecture DataFlow Trigger distribution Tracker Calorimeter Time of Flight Counters Trigger+ Cherenkov GigaBit Switch Event Builder OnlineStorage Online Monitoring Run Control Remote Mass Storage 100 MegaBit Switch VME Crates Optical links Linux PCs MICE Control and Monitoring Readout MCM Subnet Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

13. January 31, 200713 Synchronization Issue 3 subsystems have to be synchronized with each other and with the ISIS Machine Cycle: –Target –RF –DAQ An “As Soon As Ready” approach has been proposed –Each system provides a veto signal which is set when the system is not ready to receive a trigger. –The first ISIS Machine Start (MS) after all vetos are dropped generates the different triggers. Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

14. January 31, 200714 MICE Veto Target Veto RF Veto DAQ Veto MS Target Request RF Request Target Trigger Protons on target RF Trigger RF Power DT Gate DAQ Trigger Target Delay RF Delay DT Delay 20 ms Extraction Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

15. January 31, 200715 Triggers DAQ Trigger –Triggers the readout of the FEE output buffer memory –Arrives at the end of spill –Distributed to all VME crates Particle Trigger –Triggers the digitization of the signals arriving at the FEE (Trackers, Calorimeter, Cherenkov detector, Time-of-Flight counters) –Distributed to all FEE boards –MICE expects about 600 Particle Triggers for 1 DAQ trigger Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

16. January 31, 200716 DAQ Trigger DATE requires dedicated inputs for at least four event types: Start of Spill Signal sent to DAQ slightly before the beginning of the spill ensuring that all detectors are ready to receive data. This is a preparation signal for Physics events. Physics Normal data from events occurring in a proton spill. Event is built from data from each detector. End of Spill Signal sent to DAQ when the readout is finished checking that detectors read out data correctly. Calibration The following are possible ways to calibrate detectors. - Empty event (pedestal) - Pulser event - Cosmic ray event Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

17. January 31, 200717 Particle Trigger Particle Trigger Conditions for Normal Events –Burst: ISIS burst with Target within the Data Taking (DT)-Gate FEE not busy –Beam: Burst  TOF0 –Upstream: Beam  TOF1 –Traversing: Upstream  TOF2 TOF0TOF1TOF2 Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

18. January 31, 200718 Particle Trigger Simplest Implementation of the Trigger Condition selection using output Register OReg1 OReg2 OReg3 OReg4 Burst TOF0 TOF1 TOF2 Particle Trigger Request FEE Busy Particle Trigger Setting OReg selects the trigger condition Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

19. January 31, 200719 MICE Status and Schedule Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

20. January 31, 200720 MICE DAQ Summary DAQ architecture determined –DATE framework –Detector FEEs readout out by VME –Control and monitoring established Detector FEEs under development –Tracker FEE software being modified from D0 –FEE hardware for calorimeter, time-of-flight counters, and Cherenkov detectors under consideration Trigger signals and run modes established Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA

21. January 31, 200721 MICE DAQ Status and Schedule February, 2007: DAQ test bench set up at University of Geneva March, 2007: Order MICE Stage 1 FEE hardware July, 2007: Move MICE DAQ system to RAL September, 2007: DAQ working in MICE Stage 1 Terry Hart, Illinois Institute of Technology, NFMC Collaboration Meeting, UCLA