1. R. Michaels, JLAB PREX Mtg, July 2008 Compton DAQ (General) Remaining experts : Sirish Nanda, Alexandre Camsonne, me Recent Exercises Port to vxWorks 5.5 -- went ok, except one I/O not addressable -- may need faster cpu’s on ROC1/2 Incorporate FADC DAQ into General DAQ Speed Tests (goal: to do oversampling for PREX) -- 180 Hz may be possible (oversample 6) -- Not done yet, in contact with Damien Neyret.

2. R. Michaels, JLAB PREX Mtg, July 2008

3. R. Michaels, JLAB PREX Mtg, July 2008 ROC 1 / 2 : Photon and Electron Detector (the main VME crate)

4. R. Michaels, JLAB PREX Mtg, July 2008 Software on ROC1 / 2 DMA mgt of photon & electron data Scaler readout, and informs mailbox read is done Acquisition state machine mgt Online computing, prepares buffers for event builder

5. R. Michaels, JLAB PREX Mtg, July 2008 TLOOP Process on ROC 1 / 2

6. R. Michaels, JLAB PREX Mtg, July 2008 “ADC0” : a customized card involved in the trigger (no longer an ADC, it has FPGA and NIM I/O)

7. R. Michaels, JLAB PREX Mtg, July 2008

8. R. Michaels, JLAB PREX Mtg, July 2008

9. R. Michaels, JLAB PREX Mtg, July 2008

10. R. Michaels, JLAB PREX Mtg, July 2008

11. R. Michaels, JLAB PREX Mtg, July 2008 Compton Integrating DAQ CMU group & me

12. R. Michaels, JLAB PREX Mtg, July 2008 Conclusions -- Compton DAQ Priority: Implement new ETROC (electron detector) Speed tests (might prove we need 2 new 6100 cpu’s) Calibration of FADC data (photon detector) -- need trigger / time-correlation Complex system : -- replace obsolete / slow parts ? -- spares situation ? -- need improved in-house expertise  Alex’s talk