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BFC Chain Crash with Pixl Patches

Update on the simulation with Pixl patches. The BFC chain crashes when using patches for Pixl due to different geometries used in PixhitCollection and tracking. Unable to have a modified geometry file.

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BFC Chain Crash with Pixl Patches

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  1. Update on the simulation with pixl patches • BFC chain was working with TPC+full PiXL but crashes when I used patches for pixl : • Reason : different geometries used when PixhitCollection are written (StPixlFastSimMaker) and when tracking is done (StiHftHitLoader) • I was unable to have geometry file of a modified geom. (upgr15.h) using Gerrit’s how-to • Jason had a recipe on his blog to create the proper file from starsim directly : http://drupal.star.bnl.gov/STAR/blog/jwebb/2011/jul/11/howto-convert-a-starsim-geometry-root update BFC with pixl patch

  2. 2 patches • I’ve defined 2 others pixl geometry files : • pixlgeo13.g : adjacent patch • pixlgeo14.g : mercedes patch inner layer outer layer update BFC with pixl patch

  3. Starsim & BFC chain • Code in DEV. • Single pions are generated with patched pixel means no SSD nor IST material. • BFC chain : root4star -b -q 'bfc.C(1,20,"DbV20090305,trs,upgr15,-ssdfast,pixFastSim, Idst,IAna,l0,tpcI,fcf,Tree,logger,ITTF,Sti,StiRnd,PixelIT,-IstIT, StiPulls,VFMCE,NoSvtIt,NoSsdIt,MakeEvent,McEvent,geant,evout, IdTruth,tags,bbcSim,emcY2,EEfs,big,-dstout,fzin,McEvOut,clearmem, MiniMcMk","/star/institutions/ksu/bouchet/HFTPATCH_SCRATCH/ 100pions_50ev.fz") > log ' • no reco nor tracking in SSD • no tracking in IST update BFC with pixl patch

  4. Plots are the 2D positions of the first hit on tracks • Root file is MuDst.root = reconstructed tracks BFC chain works with patch Some issues to fix : • almost no hits in the second layer • Tracking evaluation using StRecTreeMaker next step : go back to hijing events with pileup update BFC with pixl patch

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