1. Structure of the front-end DAQ for DIS PARITY in Hall A Bogdan Wojtsekhowski with Bob Michaels and Albert Shahinyan Jlab, 12/1/ 2006 The issues: e/pi rejection online, stability Examples of PID from HRS, BigBite Expected performance, examples from HRS, RCS Schematic, cost, manpower, timescale Left arm improvements, cost The issues: e/pi rejection online, stability Examples of PID from HRS, BigBite Expected performance, examples from HRS, RCS Schematic, cost, manpower, timescale Left arm improvements, cost

2. Structure of HRS detector packages Jlab, 12/1/ 2006

3. Shower PID for HRS detector Jlab, 12/1/ 2006

4. Shower Calorimeter in the RCS experiment Jlab, 12/1/ 2006

5. Shower trigger and PID in the BigBite GEN package Jlab, 12/1/ 2006

6. On-line PID wiring with available electronics

7. Concept of the PID with shower detectors Low TotalHigh Total High preShower electrons pions preShower amplitude Shower amplitude

8. Shower PID - software emulator by Bob Michaels Jlab, 12/1/ 2006 Data from E99-117, the ratio e/ ~ 23 If A ~ 0.1, and ratio e/ ~ 10 with factor R~10 4 -> A ~ 10 -5 (assuming 10% accurate correction for pion A) standard HRS analysis: R ~ 2 x10 5

9. Concept of the electronic diagram

10. List of NIM electronics and cost

11. Summary Required R{e/ will be possible to get with NIM + scalers. Time scale of six months to construct and test electronics. Best option is just 20% most complicated than minimum set. Modification of the Left arm cost $10k for glass and $40k for PMTs. Upgrade of detector in HRS-Left will help future DIS experiments. Required R{e/ will be possible to get with NIM + scalers. Time scale of six months to construct and test electronics. Best option is just 20% most complicated than minimum set. Modification of the Left arm cost $10k for glass and $40k for PMTs. Upgrade of detector in HRS-Left will help future DIS experiments.