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Barrel VTX Occupancy (still under) Estimates (By-product of code debugging)

V. L. Rykov. February 13, 2004. Barrel VTX Occupancy (still under) Estimates (By-product of code debugging). Simple model for charge sharing between pixels and strips used. V. L. Rykov. February 13, 2004. Simulation model. Central AuAu@200 GeV NN : HIJING.

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Barrel VTX Occupancy (still under) Estimates (By-product of code debugging)

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  1. V. L. Rykov February 13, 2004 Barrel VTX Occupancy (still under)Estimates(By-product of code debugging) Simple model for charge sharing between pixels and strips used

  2. V. L. Rykov February 13, 2004 Simulation model • Central AuAu@200 GeVNN:HIJING. • pp@200 GeV: PYTHIA, MSEL=1, PTJet>10 GeV/c. • PISA withthe current VTX geometry in the CVS. Virtually no other PHENIX detectors besides the VTX in the PHENIX configuration. Magnetic field is OFF. • Analysis chain with the simplifiedgeneration of VTX signals (Rawhits) from GEANT hits (Ghits): charge sharing is accounted proportionally to the fraction of a track segment projection length onto the pixel or strip area. No charge diffusionin the sensor which will further increase(somewhat?) the occupancy, particularly for the perpendicular particle crossings. In the plots: • Column, from left to right= Barrel VTX layer • Upper row= x-strip or pixel channels • Lower row = u-strip channels

  3. V. L. Rykov February 13, 2004 pp@200 GeV, PTjet>10 GeV/c: Occupancy

  4. V. L. Rykov February 13, 2004 pp@200 GeV, PTjet>10 GeV/c: Ghit merge

  5. V. L. Rykov February 13, 2004 Central AuAu@200 GeVNN:Occupancy

  6. V. L. Rykov February 13, 2004 Central AuAu@200 GeVNN: Ghit merge

  7. V. L. Rykov February 13, 2004 Summary of these occupancy (still under) estimates:mean  fluctuations (RMS) PYTHIA, pp@200 GeV, PTjet > 10 GeV/c • Layer 1:pixels :(0.0030.001)% • Layer 2:x-strips:(0.0770.035)%u-strips:(0.0820.036)% • Layer 3:x-strips:(0.0470.021)%u-strips:(0.0500.022)% • Layer 4:x-strips:(0.0330.019)%u-strips:(0.0340.021)% HIJING, CentralAuAu@200 GeVNN • Layer 1:pixels :(0.530.04)% • Layer 2:x-strips:(10.80.78)%u-strips:(11.60.77)% • Layer 3:x-strips:(6.630.43)%u-strips:(7.040.40)% • Layer 4:x-strips:(4.480.27)%u-strips:(4.740.24)%

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