Cut on the reconstruction of the Cluster

I try to see if some changes on the conditions applied for the clusters reconstruction could change the number of hits reconstructed in SSD and the values of the charge then the S/N ration values are quiet low ( S/N ~ 15 for both sides) The initial condition to built the clusters is to :

find the central strip with a cut on the S/N ratio : S/N > 5
find the consecutives strips without cuts, just if the id are consecutives too

I try higher conditions :

the central strip with a cut on the S/N ratio : S/N > 8
same and a cut on the S/N ratio : S/N > 3


Picture 1 : number of strips in the clusters with the initial condition	Picture 2 : number of strips in the clusters with my condition


Picture 3 : ratio of the signal of the first strip in the clusters with the total signal of 2 strips clusters with the initial condition	Picture 4 : ratio of the signal of the first strip in the clusters with the total signal of 2 strips clusters with my condition


Picture 5 : ratio of the signal of the first strip in the clusters with the total signal of 3 strips clusters with the initial condition	Picture 6 : ratio of the signal of the first strip in the clusters with the total signal of 3 strips the clusters with my condition

Jonathan Bouchet

Last modified: Wed Oct 4 15:46:34 CEST 2005