Participants: Doris, Adrian, Dmitry

Discussion

The distributions of the clustring-1 step and correlation plots (see Correlations paragraph) were discussed in a context of cuts:

Fig. 1. Signal and noise distr. vs. alibava ch. for 50000 ev. of the run000013.dat, SeedSNRCut = 2.0

(MCz200P(irr. )@-1000V, 0deg. incl., -30deg.C, before annealing).

Fig. 2. CluCharge vs. TDC for 50000 ev. of the run000013.dat, SeedSNRCut = 2.0.

!NB This distr. shouldn't start from 0 along Y axis with a SeedSNRCut being set because the cluster charge averaged upon its strips shouldn't include any noise component since it's being cut by the NeighborSNRCut criterion (positive and negative charge of the same abs. values give zero after summing/averaging). So the cluster charge calculation should be corrected to cut out the noise charge below the cut lvl. (see example on fig. 3).

Fig. 3. CluCharge vs. TDC for 11000 ev. of the run000183.dat (June15 run for FTh200P non-irr. module@-250V, 0deg. incl., -25deg. C), SeedSNRCut = 5.0,

Thomas' code with the old EUtelescope.

Fig. 4. Cluster correlation plots along Y axis, CMSPixRef vs. DUT; 50000 ev. of the run000013.dat, SeedSNRCut = 2.0

(MCz200P(irr. )@-1000V, 0deg. incl., -30deg.C, before annealing).

        1. whatever the hist. on fig. 5 was filled right/cluster SNR calculation was correctly done
        2. if it's so, tracking procedure for the telescope has to be performed to find which exactly strips are being fired at a particular event and find the real signal clusters, because it seems like the signal is too low and covered by the noise background. At least the eta distr. gives a hope for signal presence, see fig. 6.

Fig. 5. Cluster SNR dist. for 50000 ev. of the run000013.dat, SeedSNRCut = 2.0

(MCz200P(irr. )@-1000V, 0deg. incl., -30deg.C, before annealing).

Fig. 6. dist. for 50000 ev. of the run000013.dat; left - SeedSNRCut = 2.0, right - SeedSNRCut = 5.0.

!NB Check the calculation and exclude clusters which size is greater than 2.

TODO


Miscellaneous

 


Files looked at :

SeedSNRCut/

NeighbourSNRCut

root distr. for run000013.dat

(MCz200P(irr. )@-1000V, 0deg. incl., -30deg.C, before annealing)

2.0/1.5

run000013-merger_SNR2.0.root, 000013-alibava-clustering-1_SNR2.0.root
5.0/3.75run000013-merger_SNR5.0.root, 000013-alibava-clustering-1_SNR5.0.root
 0.0/0.0 000013-alibava-clustering-1_SNR0.0.root