EE Simulation studies

Contents
Physics
General ECAL
Hermiticity
Plug region
Radiation levels

Ray tracing in crystals

Physics

Higgs acceptance with Endcaps ps file

General ECAL

The CMS photon resolution and the Tracker-ECAL interface, K Lassila, CMS Week, 7.6.2000         pdf

Hermeticity

New Energy Leakage in the Barrel/Endcap Transition
Region of the ECAL II : simplified endcap designs
and hadronic energy containment
CMS NOTE 2000/012


 ps file

Hermeticity studies with gammas CMS note99_008

EE hermeticity, outer crystals, for TDR, +2 cm ps file
EE hermeticity, outer crystals, for TDR, +2 and +4 cm ps file
EE hermeticity, outer crystals, for TDR, +1, +2, +3 and +4 cm ps file

 

Inner region for high resolution physics

Agreed Trigger towers in eta for HE and EE, G Heath txt file 19.5.99
Endcap trigger tower arrangement on a quadrant ps file 26.3.99

Crystals identified at inner edge for high resolution physics
Crystals in black, the centre crystals at eta = 2.5
Crystals in pink, those necessary for 3x3 sums
Crystals in red, those necessary for 5x5 sums

ps file


 1.Feb.1999
Inner high resolution region at eta ~ 2.65, discussion document ps file 19.Mar.1999

 

Radiation Levels

The predicted dose rates in crystals, in Gy/h, are shown in fig 2.7 in the ECAL TDR. At 1034 cm-2s-1 (high luminosity) the dose rates as a function of eta are :

Eta
 Dose rate, Gy/h (rad/h)
at shower max		 Dose rate, Gy/h (rad/h)
behind crystal
0.0 0.18 (18) 0.02 (2)
1.48 (End of EB) 0.28 (28) 0.03 (3)
     
1.48 (Start of EE) 0.29 (29) 0.04 (4)
2.6 6.5 (650) 1.4 (140)
3.0 15.0 (1500) 3.0 (300)

The total dose, for 5 x 105 pb-1 is shown in fig 1.4 in the ECAL TDR.

Eta
 Total dose rate, kGy (MRad)
at shower max		 Total dose rate, kGy (MRad)
behind crystal
0.0 2.5 (0.25) 0.2 (0.02)
1.48 (End of EB) 4 (0.4) 0.35 (0.035)
     
1.48 (Start of EE) 4 (0.4) 0.5 (0.05)
2.0 15 (1.5) 3 (0.3)
2.6 90 (9) 20 (2)
3.0 200 (20) 50 (5)

Ray tracing in crystals

Simulation of the HPMT/VPT Light collection ratio doc file 28.3.00