TRD acceptance definition

Basic idea:

There are 20 layers of TOF (each has 2 sublayers in Z)

One has to use nominal position of tubes (ladders) and define a geometrical cut applied to TrTrack object.

What has been done?

Geometrical position of each 5248 tubes was extracted from gbatch geometry.

The contours which corresponds to ladders dimensions has been introduced for each TRD layer ( same contour for 2 sublayers ).

Cut has been implemented in AMS02Cut.

Classname: TrdAcceptanceCut( const char* name, Int_t *p_trk_id, Double_t fiducial)

Tracker tracks on TRD z levels

Before TRK TrdAcceptacne cut After TRK TrdAcceptacne cut

TRD hits

All hits in event Hits which belongs to TrdTrack

TRD perfomance studies:average number of the TRD Raw hits on TRD track

Protons [3, 500] GV, Ntrd Hits in layers [0-3]>2, [4-15]>8, [16-19]>2

Beforte acceptance cut (last week): After acceptance cut:

After acceptance and R>20 GV cut:

The only way to remove lat-long dependance is ask for R>20 GV events