Charge collection efficiency
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Transcript of Charge collection efficiency
Magda Bazalova 2.10.2002 PixelWeek, CERN 1
Charge collection efficiency
July testbeam period
• AMS_310B (CiS FE-IB 60Mrad)• IZM_Bonn_3 (CiS FE-IB 60Mrad)• IZM_F – no signal
Magda Bazalova 2.10.2002 PixelWeek, CERN 8
Average charge collected
A B
0° 0° 30°
200V 10 10 9
300V 13 14 11
400V 15 15 15
600V 21 24 23
700V 23 24
AMS_310B
8
13
18
23
0 200 400 600 800Bias (V)
av
era
ge
ch
arg
e (
Ke
)
A 0deg B 0deg B 30deg
• The average charge collected by Bonn_3 is in all cases 2 Ke less.
Magda Bazalova 2.10.2002 PixelWeek, CERN 9
Conclusion
• The average charge collected with increasing bias as expected
• The average charge is smaller for angle of 30°, but there was done one measurement with 400V and 10°, giving for this bias the best value (17Ke)
• Why is there a hole in the middle of longer dimension?