RunV SSD Efficiency

All ladders
Ladders by ladders
Charge Matching : Ladders by ladders
Clusters Size : Ladders by ladders
Comparison

The cuts remain the same as I used before :

|z| < 5 cm
NHitsFit > 15
|Eta| < 1
|dca| <1 cm

Dataset : cucu62 (best calibrated)

All ladders

Here all ladders still means without ladder7 and ladder8 (identified before as dead ladders)

Figure 1 : all ladders.

ladders

Comments

I get before an efficiency of 60 % because I took into account all the ladders (but still without ladder7 and 9)
When i do the same ladder by ladder, we see that there is still few ladders that decrease the overall efficiency but for a good ladder (ladder 11), efficiency is ~ 80 % and is pretty flat with P.

ladders

Here is the charge matching for hits in SSD : each panel is for the 16 wafers per ladder.
The blue line symbolizes the perfect matching (pulse N = pulseP) and the red line is linear correlation (pulseN = a * pulseP +b from the fit from the 2-d plot)

Figure 2 : Ladder 11

The rest of the ladders are: here

Clusters

Here is the cluster size (number of strips) for the p and n-side : again each panel is for the 16 wafers per ladder.

Figure 3 : Ladder 11

The rest of the ladders are: here

Comparison

I select 4 ladders (with differents behaviours) from plots above and compare with the efficiency for a recent production (auau200 upgr 07, where there is a perfect SSD, ie noise and pedestal are fixed for all the strips).


Figure 4 : real data.	Figure 5 : upgr07 : auau200

Jonathan Bouchet

Last modified: Thu Feb 15 13:53:29 CET 2007