Strawman A Status Report Strawman A realistic geometry

Strawman A Status Report • • • Strawman A realistic geometry Tests on Strawman A Comments on Task list C. Civinini INFN – Firenze 07/10/2008 A. Tricomi, M. Galanti Universita’ and INFN - Catania C. Civinini SLHC Simulation Meeting

Strawman A • Strawman A is now ‘partially’ on CVS: for instructions https: //twiki. cern. ch/twiki/bin/view/CMS/Example. Strawman. A (thanks to Harry) • This can be considered as a production version for SLHC studies no crashes reported so far • Implemented on CMSSW_1_8_4 • Digi configurability (thanks Mike) • Not only xml geometry files but also modifications to the code to make it compatible with the new layout • Caveat: – It is a starting point • A family of strawmen A can be produced varying some parameters – Strawman A geometry is quite redundant • it can be reduced eliminating some layers realistic Strawman 07/10/2008 C. Civinini SLHC Simulation Meeting 2

Strawman A (R-Phi view) 6 ministrip layers 2 trigger doublets 4 pixel layers 07/10/2008 C. Civinini SLHC Simulation Meeting 3

Strawman A (R-Z view) 07/10/2008 C. Civinini SLHC Simulation Meeting 4

Towards a realistic ‘strawman A’ • Strawman A has a number of channels (mainly pixels from trigger layers) which is too high to be considered affordable Tables from SLHCUpgrade. Simulations/Geometry/test/tracker. Module. Info_Strawman. A. cfg Strawman A Active Surface [cm 2] # ROCs # channels # modules 251522. 3 79552 330936320 x 7 2834. 4 4320 17971200 Barrel - Strips (TIB + TOB) 616886. 2 85968 11003904 x 2. 2 18132 Endcap - Strips (TID + TEC) 902046. 7 34624 4431872 7216 Active Surface [cm 2] # ROCs Barrel - Pixels (PXB) Endcap - Pixels (PXF) Original Geometry # channels 24240 672 # modules Barrel - Pixels (PXB) 7558. 26 11520 47923200 768 Endcap - Pixels (PXF) 2834. 36 4320 17971200 672 Barrel - Strips (TIB + TOB) 1103896. 7 38160 4884480 7932 Endcap - Strips (TID + TEC) 902046. 7 34624 4431872 7216 07/10/2008 C. Civinini SLHC Simulation Meeting 5

Layout modifications - Steps • Reduce trigger doublets radii: (done) Each step will have its own geometry set • Reduce mini-strip layers: 6 4: (done) saved in CVS • 1 -2: 30 cm 25 cm • 3 -4: 70 cm 55 cm • One less in the TIB region (TIB 3) • One less in the TOB region (TOB 4) • Remove outer trigger doublet: (done) • No more strixel 3 and 4 • Insert (again) TOB stereo layers: (done) • TOB 1 and 2 with standard strip length (no mini-strip) • Introduce material budget reduction in the pixel system: (to be done) • Already done without volume changes (material reweigthing) for phase 1 studies • Mini-strips in TOB stereo layers (to be done) • Add a third Pixel disk (to be done) 07/10/2008 C. Civinini SLHC Simulation Meeting 6

Step 1: doublets at minimum radii Saves 10% of pixel channels (pitches unchanged) Big saves if Strixels longitudinal size is reduced. This configuration can also be used to study the effect of doublets radius on Trigger. 07/10/2008 C. Civinini SLHC Simulation Meeting 7

Step 2: TIB 3 and TOB 4 removed Working version But can be used to study the effect of strip Layers reduction on tracking performance 07/10/2008 C. Civinini SLHC Simulation Meeting 8

Step 3: strixel 3 and 4 removed Working version: Same comment as before 07/10/2008 C. Civinini SLHC Simulation Meeting 9

Step 4: TOB 1 and TOB 2 reinserted Stereo TOB layers build with long strips (no mini-strips) -50% pixel ch. -20% strip ch. with respect to Strawman A 07/10/2008 C. Civinini SLHC Simulation Meeting 10

Strawman. A Vs Step 4 Full geometry table in: http: //hep. fi. infn. it/CIVININI/slhc/Geometry. Table. xls Strawman A Barrel - Pixels (PXB) Active Surface [cm 2] # ROCs # channels # modules 251522. 3 79552 330936320 24240 2834. 4 4320 17971200 672 Barrel - Strips (TIB + TOB) 616886. 2 85968 11003904 18132 Endcap - Strips (TID + TEC) 902046. 7 34624 4431872 7216 Active Surface [cm 2] # ROCs # channels # modules Endcap - Pixels (PXF) Realistic Strawman A Barrel - Pixels (PXB) 58030. 73 41408 172257280 5680 2834. 36 4320 17971200 672 Barrel - Strips (TIB + TOB) 829242. 6 72288 9252864 14712 Endcap - Strips (TID + TEC) 902046. 7 34624 4431872 7216 Endcap - Pixels (PXF) 07/10/2008 C. Civinini SLHC Simulation Meeting 11

Next steps • Reduce the inner pixel material budget – CO 2 cooling – Part of the read-out electronics moved at high h • Third forward pixel disk • Stereo TOB layers with mini-strips 07/10/2008 C. Civinini SLHC Simulation Meeting 12

Layout proposed by Geoff 1. 20 Longer barrel layers to match PT layers, at present locations 1. 00 Remaining end caps with present locations 0. 80 Stereo layers Stereo rings 0. 60 0. 40 h = 2. 5 PT layers to cover full h range 0. 20 Pixels: 4 barrel layers + increased size Endcap could be 3 disks/endcap? 0. 00 -0. 10 07/10/2008 July 2008 0. 40 0. 90 1. 40 C. Civinini SLHC Simulation G Hall Meeting 1. 90 2. 40 G. Hall 13 13

Studies using Strawman A geometry • Tracking performances with pileup (standard multitrack validator): – Fast simulation done (L up to 1035 cm-2 s-1 easy to run) results not too much significant, performance quite independent on pileup and geometries – Fast sim + digi + std reco to be done faster than full sim – Full sim + digi + std reco to be done (L as high as possible, limitations expected from CPU time and memory problems), needs one pileup set for each different geometry; performance for single particle tracking not significant • Occupancy: – Fast and Full simulation to be done comparison and high luminosity estimations – intermediate results of previous points 07/10/2008 C. Civinini SLHC Simulation Meeting 14

Comments on the Task list • Point 1 (trigger studies) – Strawman A can be used • Doublets parameters can be changed (strixel dimensions, doublets radii, doublets Dr) • One or two doublets • Point 2 (4 th pixel layer) – Strawman A (modified) • 4 pix + 2 strix (present strawman A) • 3 pix + 2 closer strix (step 1) • 5 pix and no strip (not implemented) • Point 3 (Strawman A tracking performance) – Realistic strawman A • Occupancy and tracking performance (see previous slide) 07/10/2008 C. Civinini SLHC Simulation Meeting 15