Strawman A Status Report Strawman A realistic geometry Tests on Strawman A Comments on Task list C. Civinini INFN – Firenze A. Tricomi, M. Galanti Universita’ and INFN - Catania
SLHC Simulation Meeting Strawman A Strawman A is now ‘partially’ on CVS: for instructions https://twiki.cern.ch/twiki/bin/view/CMS/ExampleStrawmanA (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
Strawman A (R-Phi view) 6 ministrip layers 2 trigger doublets 4 pixel layers 07/10/2008 C. Civinini SLHC Simulation Meeting
SLHC Simulation Meeting Strawman A (R-Z view) 07/10/2008 C. Civinini SLHC Simulation Meeting
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 SLHCUpgradeSimulations/Geometry/test/trackerModuleInfo_StrawmanA.cfg Strawman A Active Surface [cm2] # ROCs # channels # modules Barrel - Pixels (PXB) 251522.3 79552 330936320 24240 Endcap - Pixels (PXF) 2834.4 4320 17971200 672 Barrel - Strips (TIB + TOB) 616886.2 85968 11003904 18132 Endcap - Strips (TID + TEC) 902046.7 34624 4431872 7216 x 7 x 2.2 Original Geometry Active Surface [cm2] # ROCs # channels # 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
Layout modifications - Steps Reduce trigger doublets radii: (done) 1-2: 30cm 25cm 3-4: 70cm 55cm Reduce mini-strip layers: 64: (done) One less in the TIB region (TIB3) One less in the TOB region (TOB4) 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) Each step will have its own geometry set saved in CVS 07/10/2008 C. Civinini SLHC Simulation Meeting
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
Step 2: TIB3 and TOB4 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
Step 3: strixel 3 and 4 removed Working version: Same comment as before 07/10/2008 C. Civinini SLHC Simulation Meeting
Step 4: TOB1 and TOB2 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
SLHC Simulation Meeting StrawmanA Vs Step 4 Full geometry table in: http://hep.fi.infn.it/CIVININI/slhc/GeometryTable.xls Strawman A Active Surface [cm2] # ROCs # channels # modules Barrel - Pixels (PXB) 251522.3 79552 330936320 24240 Endcap - Pixels (PXF) 2834.4 4320 17971200 672 Barrel - Strips (TIB + TOB) 616886.2 85968 11003904 18132 Endcap - Strips (TID + TEC) 902046.7 34624 4431872 7216 Realistic Strawman A Active Surface [cm2] # ROCs # channels # modules Barrel - Pixels (PXB) 58030.73 41408 172257280 5680 Endcap - Pixels (PXF) 2834.36 4320 17971200 672 Barrel - Strips (TIB + TOB) 829242.6 72288 9252864 14712 Endcap - Strips (TID + TEC) 902046.7 34624 4431872 7216 07/10/2008 C. Civinini SLHC Simulation Meeting
SLHC Simulation Meeting Next steps Reduce the inner pixel material budget CO2 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
Layout proposed by Geoff Longer barrel layers to match PT layers, at present locations Remaining end caps with present locations Stereo layers Stereo rings PT layers to cover full h range h = 2.5 Pixels: 4 barrel layers + increased size Endcap could be 3 disks/endcap? G. Hall 07/10/2008 C. Civinini SLHC Simulation Meeting July 2008 G Hall 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
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 (4th 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