Abstract: ECAL upgrade performance plots for 2013 EPS Conference
Figure  Caption 

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Energy resolution of protonirradiated PBWO4 EE crystals The plot shows the energy resolution for PbWO4 crystal matrices constructed from proton irradiated crystals. The numbers in the legend indicate the average induced absorption μind, defined in the equation below, where LT is the crystal light transmission at wavelength λ measured longitudinally, LT0 is its original value before irradiation and L is the crystal length. The induced absorption is calculated as a weighted average of the values of the 3x3 crystals in the matrix. The weights are given by the relative energy deposit in each crystal assuming an EM shower centered on the 3x3 matrix. The resolution was measured using test beam data with high energy electrons (10150 GeV). The crystals were readout by PMTs. The noise term at the testbeam (different from the one at CMS due to the different photodetectors and electronics) is correctly taken into account. The induced absorption coefficient indicated in the plot is affected by an error of about 2030% due to the nonuniformity of the proton beam used for the irradiation. The energy resolution is measured for electrons impacting on a 1x1 cm2 window on the crystal front face. The resolution is calculated using the effective sigma, defined as the smallest width of the distribution containing 68% of the events. 
Equation defining μind Average induced absorption μind is defined by this equation, where LT is the crystal light transmission at wavelength λ measured longitudinally, LT0 is its original value before irradiation and L is the crystal length. 

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ECAL Endcap Longevity Predictions for the energy resolution in the endcaps at η=2.2 after 500 (top) and 3000 (bottom) fb1 of integrated luminosity, calculated using the ECAL model for crystal radiation damage. The model is made using crystal transparency measurements from hadron and gamma irradiated crystals, radiation doses calculated by the MARS program and the SLITRANI light transport simulation program. The model was validated using testbeam data from of hadronirradiated crystal matrices. The energy resolution is given by three terms: the stochastic (a), noise (b) and constant term (c) as in the formula given below. The light output degradation contributes to the stochastic term, as well to the noise term, which is amplified by the noise equivalent of the energy. The constant term is also degraded due to the deterioration of the light collection uniformity. 
Energy Resolution The energy resolution is given by three terms: the stochastic (a), noise (b) and constant term (c). 
I  Attachment  History  Action  Size  Date  Who  Comment 

3000fb.pdf  r1  manage  15.5 K  20130802  15:44  RiccardoParamatti  
png  3000fb.png  r1  manage  22.5 K  20130802  15:44  RiccardoParamatti  
500fb.pdf  r1  manage  15.7 K  20130802  15:44  RiccardoParamatti  
png  500fb.png  r1  manage  23.3 K  20130802  15:44  RiccardoParamatti  
EEresolvsEnergy.pdf  r1  manage  19.2 K  20130802  15:48  RiccardoParamatti  
png  EEresolvsEnergy.png  r1  manage  21.3 K  20130802  15:48  RiccardoParamatti  
png  equation_muind.png  r1  manage  16.2 K  20130924  01:18  ToyokoOrimoto  
png  resolution.png  r1  manage  21.1 K  20130924  02:20  ToyokoOrimoto 