Structure of the front-end DAQfor DIS PARITY in Hall A

Structure of the front-end DAQfor DIS PARITY in Hall A

Bogdan Wojtsekhowskiwith 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

Structure of HRS detector packagesStructure of HRS detector packages

Jlab, 12/1/ 2006

Shower PID for HRS detectorShower PID for HRS detector

Jlab, 12/1/ 2006

Shower Calorimeter in the RCS experimentShower Calorimeter in the RCS experiment

Jlab, 12/1/ 2006

Shower trigger and PID in the BigBite GEN packageShower trigger and PID in the BigBite GEN package

Jlab, 12/1/ 2006

On-line PID wiring with available electronicsOn-line PID wiring with available electronics

Concept of the PID with shower detectors Concept of the PID with shower detectors

Low Total High Total

High preShower

electrons

pions

preS

how

er a

mpl

itud

e

Shower amplitude

Shower PID - software emulator by Bob MichaelsShower 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/ ~ 10with factor R~104 -> A ~ 10-5

(assuming 10% accurate correction for pion A) standard HRS analysis: R ~ 2 x105

Concept of the electronic diagramConcept of the electronic diagram

List of NIM electronics and costList of NIM electronics and cost

SummarySummary

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.