current version of the note on SSD efficencies during CuCu run V (work with Vi Nham Tram)

11/29 : update

I updated the code with which we did the plots with the code from SL08e library.

I rerun over a simple fzd file (20 events with 300 pions plus/per ev with y2007 geom) :

detp geometry y2007

make geometry

gClose all

make gstar

debug on

gfile o myfile2.fzd

gvertex 0 0 0

gkine 300 8 0.1 5.0 -1.2 1.2 -3.1415 3.1415

trig 20

exit

The bfc chain I used for the reco :

"MakeEvent,trs,-srs,ssd,fss,y2007,Idst,IAna,l0,tpcI,fcf,Tree,logger,ITTF,Sti,genvtx,-SvtIt,SsdIt,geant,-evout,IdTruth,tags,bbcSim,tofsim,emcY2,EEfs,-GeantOut,big,-dstout,-McEvout,fzin,StarMagField,MiniMcMk,McAss,McAna"

The file and code are at :

/star/institutions/emn/bouchet/new_note/myfile2.fz

/star/institutions/emn/bouchet/new_note/StRoot

I vary the noise from 8 to 255 ADC (so it makes 0.5 to 15.93 adc) : the way i increase the noise is to increase the noise by 13 adc by ladders:

ladder 0 --> all the strips have a noise =8 adc

ladder 1 --> all the strips have a noise =13 adc

...

ladder 19-->all the strips have a noise =255 adc

from this plot :

• top left : number of hits from GEANT
• top right : number of hits per ladder after dead and inactive areas removal
• bottom left : number of reco hits per ladder

And from this plot :

• efficiency (= number of hits reco / number of hits GEANT) vs strips noise level