1. “MIXED” test
Cosmics
Tono
LNGS
I.Kreslo LHEP BERN

2. Plates sharing ROME? BERN BOLOGNA BARI LYON? LNGS? NEUCH. SALERNO
NAPOLI
I.Kreslo LHEP BERN

3. Volume tracks efficiency (12plates)
Θ<200
200<Θ<400
Θ>400
BERN
BOLOGNA
BARI
NEUCH.
SALERNO
NAPOLI
Z, microns
I.Kreslo LHEP BERN

4. Gains on basetrack Θ<200 200<Θ<400 Θ>400 BERN BOLOGNA BARI
NEUCH.
SALERNO
NAPOLI
Z, microns
I.Kreslo LHEP BERN

5. Gains on basetrack Θ<200 200<Θ<400 Θ>400 BERN BOLOGNA BARI
NEUCH.
SALERNO
NAPOLI
Z, microns
I.Kreslo LHEP BERN

6. Gains on basetrack Θ<200 200<Θ<400 Θ>400 BERN BOLOGNA BARI
NEUCH.
SALERNO
NAPOLI
Z, microns
I.Kreslo LHEP BERN

7. Grains on basetrack Θ<200 200<Θ<400 Θ>400 BERN BOLOGNA
BARI
NEUCH.
SALERNO
NAPOLI
Z, microns
I.Kreslo LHEP BERN

8. Coordinate accuracy Θ<200 200<Θ<400 Θ>400 BERN BOLOGNA
BARI
NEUCH.
SALERNO
NAPOLI
Z, microns
I.Kreslo LHEP BERN

9. Angular accuracy Θ<200 200<Θ<400 Θ>400 BERN BOLOGNA BARI
NEUCH.
SALERNO
NAPOLI
Z, microns
I.Kreslo LHEP BERN

10. Basetrack quality Θ<200 200<Θ<400 Θ>400 BERN BOLOGNA BARI
NEUCH.
SALERNO
NAPOLI
Z, microns
I.Kreslo LHEP BERN

11. ARE WE FACING A SERIOUS PROBLEM??
Questions
Cosmics tracking efficiency for all except Bologna ~60%
No evident difference in other parameters
Possible reasons:
Refreshing -> loss of sensitivity
Developing instability (???)
Still to many “single” basetracks not confirmed
In neighbour plates -> Noise?
ARE WE FACING A SERIOUS PROBLEM??
I.Kreslo LHEP BERN