Update on the simulation with pixl patches BFC

Update on the simulation with pixl patches • BFC chain was working with TPC+full Pi. XL but crashes when I used patches for pixl : – Reason : different geometries used when Pixhit. Collection are written (St. Pixl. Fast. Sim. Maker) and when tracking is done (Sti. Hft. Hit. Loader) – I was unable to have geometry file of a modified geom. (upgr 15. 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-astarsim-geometry-root 10/25/11 update BFC with pixl patch 1

2 patches • I’ve defined 2 others pixl geometry files : – pixlgeo 13. g : adjacent patch – pixlgeo 14. g : mercedes patch inner layer 10/25/11 outer layer update BFC with pixl patch 2

Starsim & BFC chain • Code in DEV. • Single pions are generated with patched pixel means no SSD nor IST material. • BFC chain : root 4 star -b -q 'bfc. C(1, 20, "Db. V 20090305, trs, upgr 15, -ssdfast, pix. Fast. Sim, Idst, IAna, l 0, tpc. I, fcf, Tree, logger, ITTF, Sti. Rnd, Pixel. IT, -Ist. IT, Sti. Pulls, VFMCE, No. Svt. It, No. Ssd. It, Make. Event, Mc. Event, geant, evout, Id. Truth, tags, bbc. Sim, emc. Y 2, EEfs, big, -dstout, fzin, Mc. Ev. Out, clearmem, Mini. Mc. Mk", "/star/institutions/ksu/bouchet/HFTPATCH_SCRATCH/ 100 pions_50 ev. fz") > log ' • no reco nor tracking in SSD • no tracking in IST 10/25/11 update BFC with pixl patch 3

• Plots are the 2 D positions of the first hit on tracks • Root file is Mu. Dst. root = reconstructed tracks BFC chain works with patch Some issues to fix : • almost no hits in the second layer • Tracking evaluation using St. Rec. Tree. Maker next step : go back to hijing events with pileup 10/25/11 update BFC with pixl patch 4