1. Overview of E906 Electronics, Readouts, and DAQ System E906 DAQ workshop Ting-Hua Chang (7/6 – 7/7/2009)

2. E906 electronics overview

3. Readout Front-end Electronics - Hodoscopes : Discriminators, Coincidence Register Hodo Plane X1Y1X2Y2Y3X4AX4BY4 # of Channels (64?) 32 Each channel of Station 4 will use 2 PMTs, the output goes to meantimer after discriminated. Station 4 hodo signals -> PS710 -> LeCroy 624 ->LeCroy 4616, ECL out. For Station 1,2,3, the signals go to LeCroy 4416 (discriminator), outputs in ECL. All use IPAS-made CR for readout. Hodo signals go to Trigger Modules

4. Tracking signals St. 1 MWPC – ~4500 channels, Coincidence Registers St. 2 Drift Chamber – ~1000 channels, TDC St. 3 Drift Chamber – ~700 channels, TDC St. 4 Prop Tube -- ~400 channels, TDC All equipped with preamp/discriminators cards

5. Trigger System Trigger decision made from Hodo signals Trigger decisions are to be made by 3 FPGA trigger modules (CEAN 1495) Signal delay adjusted so signals arrive Trigger FPGA in time Retimed with RF signals before sending to FPGA trigger modules

6. DAQ and Readout system

7. DAQ hardware VME-based readout electronics system Each VME crate equipped with a Trigger Interface (TI) and a onboard computer (ROC: Readout Controller) There is one Trigger Supervisor (TS) in the master crate. It controls event readout for all other VME crates. Trigger signals are fan-out to TIs.

8. Linux host running CODA Ethernet Hub Data Storage Online monitoring Data Decoder Software MWPC, HODO, Coincidence Register System, VME CAMAC (VME?) TDC for DC+PT Interface to VME Accelerator scalers, CAMAC (VME ?) Conceptual design of DAQ based on CODA Electronics House Counting House 5-6 ROCs 2-3 ROCsROC TS, Trigger Bit Latch, scalers Trigg er

10. DAQ Control Software CODA : Cebaf Online Data Acquisition Network-based DAQ system Front-end CPUs focus on pulling data out Event building/formatting is on PC server Event buffer is also on PC server Up to 32 VME crates can be handled by CODA Data stored in hard disks

12. Scalers (Slow Control) For Beam line, Target, Hodo scintilators Scaler Trigger: Begin of Run (BOR), End of Run (EOR), Begin of Spill (BOS), End of Spill (EOS), Periodical. Scaler Trigger sent to TS, processed by DAQ as usual events VME-based scalers preferred Scalers are to be put in the same crate of TS?

13. Install a minimum daq system using CODA PC server (Linux kernel 2.6, CODA 2.6) VME cpu : MVME6100 or above, VxWorks 5.5.1, kernel: WIND version 2.6 A Trigger board: Trigger Interface card from JLab or SIS3610 A few modules to be readout Follow the instructions from website http://www-hep.phys.sinica.edu.tw/E906 http://www-hep.phys.sinica.edu.tw/E906

14. Discussion Session Note: Items marked with ★ need to assign people to work on

15. Survey of Detectors and Electronics Station 1 MWPC Current status? Preamp card design pending on chamber information To set/change threshold level: Do we need software setting capability? Station 2 Drift Chamber: status and readout electronics? Station 3 Drift Chamber: status and readout electronics? Station 4 Prop Tubes: status and readout electronics? How many channels exactly?

16. Detectors and Electronics Hodoscopes –How many channels in each station plane? –Status and readout electronics –Remote HV control for PMTs? ★

17. Scalers There were 105 scalers recorded in E866 (see E866_scaler_list.doc) What are those scalers from target and beam line? What are the devices/probes to generate those data/signals? Any hardware needed in DAQ end besides scalers? How many scaler channels available from 3 CEAN 1495 trigger module? How many scalers available in TS?

18. Scalers We might need extra electronics (e.g. fan- outs, coincidences) to create scaler input signals. if FPGA and TS does not have enough channels, can we get more VME scalers?

19. Signals from Beamline What was recorded in E866 scalers? What signals do we need? What are the signal types? Where and how to get those signals? ★ How are we going to use/record them? ★

20. Trigger How and Where to do retiming? ★ Where are the Pulse Stretchers? ★ What types of triggers do we want to have? (ref. to E866 scaler list) What triggers a scaler event? When are we going to readout the scalers?

21. Monitoring, Control and Calibration How and What about: –Beamline Monitoring ★ –Target Monitoring & control ★ –Magnet current Monitoring & control ★ –TDC calibration ★

22. DAQ, CODA, Computing Computer Administration and network ★ CODA installation and maintenance ★ Data storage and organization ★

23. Programming and Software Libraries of readout electronics (CR & TDC & scalers & others) ★ Crl for ROCs and test of subsystems ★ Decoder and package re-formatter ★ (Transform the event format for the analysis people) Online histogram display & monitoring ★

24. Final Assemble (on floor) The location of readout electronics? ★ Note: Most detector output signals are in ECL, 10 meters cable length limitation Detailed layout of electronics: racks, crates, modules, cable connections ★ Concrete Shielding blocks for electronics? ★ Cabling and cable-supporting infra-structures, power lines, etc. ★ Put everything together and test. ★

25. Last quad doublet about 200’ upstream Counting Room ~60ft preamp output in ECL. Cable length limitation 10 m (~30 ft) Racks on floor OK? Shielding blocks? Cable trays? Power lines? St 4 TDC +Trigger decision electronics? Where to put the racks? St.3 TDC St. 1 CR + St. 2 TDC Plan 1

26. Last quad doublet about 200’ upstream Counting Room ~60ft preamp output in ECL. Cable length limitation 10 m (~30 ft) Racks on floor OK? Shielding blocks? Cable trays? Power lines? St 4 TDC +Trigger decision electronics? Where to put the racks? St.1+2+3 readouts St. 1 + 2 re-shaper Plan 2

27. Final Assemble (counting house) Computers and system administration ★ Control and Monitor screens ★ Networks ★

28. Schedule Priority denoted by (p). Date to be discussed. (1) by end of (August 2009) (2) by end of (November 2009) (3) by end of (February 2010) (4) by end of (April 2010) (5) by end of (June 2010)

29. Task Classification Front-End Hardware (Electronics) Preparation –preAmps (1) –CR (1) –TDC (1 to 2) –Scalers (2 to 3) –Beamline scalers (4) –Target info to DAQ(4) –Trigger modules (2 to 3) Computing –PCs (1) –System Admin (1) –CODA Admin(1) –Data storage (2)

30. Task Classification Front-End Software Readout electronics libraries (1 to 2) Crl code for CODA ROCs(1 to 2) Back-End software Decoder (1 to 2) Event Re-formatter (2) Online display (1 to 2) TDC calibration (3)

31. Task Classification Control and Monitoring (4 to 5) –PMT HV control –Beamline Monitoring –Target Monitoring & control –Magnet current Monitoring & control Construction Engineering (2 to 5)

32. Manpower Assignment List of Manpower available to work on ★ : Rutgers: Ron, Lamiaa UMD: Betsy, Kaz, Prabin IPAS: Wen-Chen, Yen-Chu, Da-Shung, Xuan- Hal LingTung U.: Ting KaoShung U. : Rurng-Sheng, Su-Yin Engineers from FNAL available? Who else?