TEPX Simulations for TWEPP2019

Introduction:

In order to establish an understanding of the potential properties of TEPX as luminometer for Phase 2 CMS luminosity measurement, detector simulations are being carried out by the BRIL collaboration. Since for Phase-II the range of pileup values over which the vdM calibration will have to be extrapolated is large with respect to Run-II, the linearity of observables accessible with TEPX as a function of pileup is of particular interest.

For this purpose, detailed detector simulations have been started using the CMSSW release 10_4_0_pre2 and the Inner Tracker geometry version 6.1.3. To generate data samples over a large range of pileup, single-neutrino events have been overlaid with a variable number of minimum bias events using the CMSSW mixing module. 100,000 events have been generated for pileup values smaller than 20 and 10,000 events have been used for all larger pileup numbers to limit computing time to reasonable values.

FigureSorted ascending Caption
linearity_d1r1.png Simulated mean number of clusters as a function of pileup for Disk 1 Ring 1 of the Inner Tracker Endcap Pixel Detector (TEPX).
The data points are fitted with a first-order polynomial in the pileup interval from 0 to 2, and the extrapolation to pileup 200 is shown with a 95% confidence interval.
This is done to replicate the principal approach taken with the Van der Meer calibration.
linearity_d1r5.png Simulated mean number of clusters as a function of pileup for Disk 1 Ring 5 of the Inner Tracker Endcap Pixel Detector (TEPX).
The data points are fitted with a first-order polynomial in the pileup interval from 0 to 2, and the extrapolation to pileup 200 is shown with a 95% confidence interval.
This is done to replicate the principal approach taken with the Van der Meer calibration.
linearity_d4r1.png Simulated mean number of clusters as a function of pileup for Disk 4 Ring 1 of the Inner Tracker Endcap Pixel Detector (TEPX).
The data points are fitted with a first-order polynomial in the pileup interval from 0 to 2, and the extrapolation to pileup 200 is shown with a 95% confidence interval.
This is done to replicate the principal approach taken with the Van der Meer calibration.
linearitydeviation.png Relative non-linearity for all rings of all disks of the Inner Tracker Endcap Pixel Detector (TEPX).
It is calculated as the relative difference between the data point and the value of the fit function at the respective pileup value.
ring_rates.png Simulated distribution of the per-module data rates for each ring of TEPX at pileup 200 and a rate of 75 kHz of zero-bias triggers. The rates are calculated over all disks of TEPX, using the RD53B -specific encoding and do not account for any link layer protocol.

-- AlexanderJonasRuede - 2019-08-12

Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng linearity_d1r1.png r2 r1 manage 170.7 K 2019-08-12 - 17:08 AlexanderJonasRuede  
PNGpng linearity_d1r5.png r2 r1 manage 174.1 K 2019-08-12 - 17:09 AlexanderJonasRuede  
PNGpng linearity_d4r1.png r2 r1 manage 172.1 K 2019-08-12 - 17:09 AlexanderJonasRuede  
PNGpng linearitydeviation.png r2 r1 manage 116.2 K 2019-08-12 - 17:09 AlexanderJonasRuede  
PNGpng ring_rates.png r1 manage 139.3 K 2019-08-12 - 15:01 AlexanderJonasRuede  
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Topic revision: r2 - 2019-08-12 - AlexanderJonasRuede
 
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