2. 3E7_05151 wafer 11 IV curve Noise ~122e Source scans bad and
independent on HV (10,20,30V):
Only few pixels work with the
correct charge collection

3. noise Noise is too low for almost all the pixels.
The few that have higher noise than behave correctly in the source scan (see next) . To be checked systematically…

4. some pixels have the average at 30ToT Others to 5Tot
Average ToT per pixel
some pixels have the average at 30ToT
Others to 5Tot
Many do not respond

5. A good channel…
A bad one

6. It is not noise Only few pixels have hits and the spectra
is different.

7. In terms of charge

8. Very similar results for another device on the same wafer
Noise is completely independent on the HV (always 127e)
See next for correlation noise/good channels

10. 3E7_06152 wafer 15
IV curve
HV= 10V
Noise ~230e

11. Noise
Average noise 230
Distribution is reasonable

12. Hit map is
more uniform

13. Average ToT
Per pixel

14. And charge Pixel average (top) All hit entries bottom
(higher peak to be better
understood if due
to single pixels or not)

15. Another chip: 3e11_07152 wafer 15
10 V V