1. PVDIS Overview

2. PVDIS vs SIDIS PVDIS SIDIS
Can you find six differences between these panels?
GEM Layout, Extra E-Cal, Beam Pipe
Target Location, Baffles (PVDIS), Cerenkov’s,

3. Motivation for PVDIS Standard Model d/u for Hydrogen Di-quarks in
No sin2θW
Di-quarks in
the nucleon
(Q2 Dependence)
CSV at Quark Level

4. Preparations for the Director’s Review (11/1/11)
Presentable C Design (Malace, Fuchey)
Presentable Calorimeter Designs (Huang)
Presentable MRPC Design
Settle on Field Maps (Reimer)
Realistic CLEO baffle, acceptance, FOM (Riordan)

5. PVDIS Setup

6. Cont. Finish tracking framework (Riordan) Backgrounds (Zana)
GEM response, digitization
Tracking in GEMC
Backgrounds (Zana)
Resolve background discrepancies: GEANT3, Geant4, FLUKA
Finish radiation hardness studies
Monte Carle backgrounds for C detectors

7. Cont. Quantitative DAQ analysis issues SIDIS Trigger
PVDIS Precision Calibration
Elastic events for momentum calibration (Rich)
Tracking alignment: Blockable holes in baffles?

8. Cont. PVDIS sytematic issues
Pion asymmetry based on DIS pions to photopions
Spatial resolution of tracks 35o relative to beam axis
Rate dependent effects, including corrections to Q2

9. Cont.
Calibration and systematics for SIDIS --
PVDIS target (JP)

10. Statistical Errors (%) vs. Kinematics
A/Q2 should be perfectly flat! (Modulo small y-dep)
4 months at 11 GeV
2 months at 6.6 GeV
Error bar σA/A(%) shown at center of bins in Q2, x
9 September 2010
Paul E. Reimer, PAVI 11

11. Pile-up and Dead Time Dither Intensity: ~10-2
Empirically measure all effects.
Reduce Acceptance and vary Intensity by 20%
Correct for density variation
Calibrate BCM
Solid target
Linear Luminosity Monitor

12. Sensitivity: C1 and C2 Plots
World’s data
9 September 2010
Paul E. Reimer, PAVI 11