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HFT tracking with TPC+ PXL only
- upgr15 has been modified to only have the 2 pixel layers (R1 = 2.5 and R2 = 8cm) (modified geometry.g)
- for now there is no patches applied, ie the pixel has FULL coverage
- code is DEV
- test BFC chain with single pions
- the chain options are :
root4star -b -q 'bfc.C(1,50,"DbV20090305,trs,upgr15,-ssdfast,pixFastSim,Idst,IAna,l0,tpcI,fcf,Tree,logger,ITTF,Sti,StiRnd,PixelIT ,-IstIT,StiPulls,genvtx,NoSvtIt,NoSsdIt,-SsdIT,MakeEvent,McEvent,geant,evout,IdTruth,tags,bbcSim,emcY2,EEfs,big,-dstout,fzin,McEv Out,clearmem,MiniMcMk","/star/institutions/ksu/bouchet/HFTPATCH/RECO/TEST_DEV/50ev_100pions_patch.fz")'
A. Detector config.
Below is a plot from STARSIM showing the TPC and PXL
A.1 patches
The following are GEANT plots for the 2 patches.
I have defined (properly) the files pixlgeo13.g (adjacent) and pixlgeo14.g (mercedes) under /pams/geometry/pixlgeo and make the appropriate changes in /pams/geometry/geometry/geoemtry.g to call one or the other config.
HOW-TO make an .h file for a given geometry using starsim (from Jason Webb's blog)
# First create the geometry tag in starsim $ starsim starsim > detp geom upgr15 starsim > gclos all starsim > grfile upgr15.rz starsim > exit # Now we have the geometry in a ZERBRA file... to go to ROOT $ g2root upgr15.rz $ root upgr15.C
- move the upgr15.C to upgr.h
- create a dir. StarDb/AgiGeometry
- 3 move upgr15.h in that directory in order that Sti looks first in this local directory
Some commands to view geom. in agml
To print the list of all volumes in a geom. :
test->GetListOfVolumes()->Print()
result :
Collection name='TObjArray', class='TObjArray', size=256 OBJ: TGeoVolume HALL Top volume OBJ: TGeoVolume CAVE CAVE TGeoPcon OBJ: TGeoVolume ETTV ETTV TGeoTube OBJ: TGeoVolume ETRV ETRV TGeoTube OBJ: TGeoVolume ETRD ETRD TGeoTubeSeg OBJ: TGeoVolume TRAD TRAD TGeoTubeSeg OBJ: TGeoVolume TABS TABS TGeoTubeSeg OBJ: TGeoVolume TBOD TBOD TGeoTubeSeg OBJ: TGeoVolume ETFV ETFV TGeoTube OBJ: TGeoVolume ETOF ETOF TGeoTubeSeg OBJ: TGeoVolume TBOX TBOX TGeoTubeSeg OBJ: TGeoVolume TGAS TGAS TGeoTubeSeg OBJ: TGeoVolume TPCB TPCB TGeoTubeSeg OBJ: TGeoVolume TGLA TGLA TGeoTubeSeg OBJ: TGeoVolume TGAP TGAP TGeoTubeSeg OBJ: TGeoVolume ECLV ECLV TGeoTube OBJ: TGeoVolume TECL TECL TGeoTubeSeg OBJ: TGeoVolume TEAA TEAA TGeoTubeSeg OBJ: TGeoVolume TEAB TEAB TGeoTubeSeg OBJ: TGeoVolume SCIN SCIN TGeoTubeSeg OBJ: TGeoVolume FSCE FSCE TGeoBBox OBJ: TGeoVolume FSCT FSCT TGeoBBox OBJ: TGeoVolume TUTR TUTR TGeoBBox OBJ: TGeoVolume ABOX ABOX TGeoBBox
To draw the HALL with root GL viewer :
test->GetVolume("HALL")->Draw("ogl")
B. track pointing resolution
We should also look at the hit pulls to see what are the difference ,and pulls of the hit wrt the track projection
--> in progress
* update 11/7 : look at Sti residuals using .tags files
2 samples :
- 500 pions per event (flat Pt in [0,5], flat in |y|<1) with full pixel + ssd ; 50 events
- 500 pions per event (flat Pt in [0,5], flat in |y|<1) with full pixel ; 50 events
Coordinates in Sti are defined as :
- X : radius
- Y :r/phi along the detector
- Z : z along beam axis
A schema is here
Residuals = difference of Hit position and the track projection, for a given layer
For SSD+PXL :
For PXL only :
C. patches in SL08f
some results for single tracks, not yet hijing
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