<i>Cosmic Rays Tests. HV Scans.<br />185 M3R4 chambers passed the tests</i></font>

Cosmic Rays Tests. HV Scans.
185 M3R4 chambers passed the tests

<i>Table presents counts averaged over 24 pads measured during 300 sec in the AND mode (AB&CD).<br />Scan Types<br />Scan1 - HV(AB)= fixed @ 2550 kV<br />Scan2 - HV(CD)= fixed @ 2550 kV</i>

Table presents counts averaged over 24 pads measured during 300 sec in the AND mode (AB&CD).
Scan Types
Scan1 - HV(AB)= fixed @ 2550 kV
Scan2 - HV(CD)= fixed @ 2550 kV


Cosmic rays counts(averaged over 24 pads)for M3R4 chambers
Chamber Scan 2.35 kV 2.45 kV 2.55 kV 2.65 kV 2.75 kV 2.85 kV Date Plot Comments
6 1
2		 296
272		 336
324		 356
356		 371
371		 485
416		 884
633		 09-JUL-07

Fig.1 Counts/300s averaged over 24 pads.
AB&CD.
Scan1: HV(AB)=2550V
Scan2: HV(CD)=2550V		 Fig.2 Counts distribution in 24 pads.
AB&CD.
HV(AB)=HV(CD)= 2550 V		 Fig.3 Counts/300s averaged over 8 pads
in FEB1, FEB2, FEB3.
AB&CD
Scan1: HV(AB)=2550V
Scan2: HV(CD)=2550V

For comments, contact: Petr.Neustroev@cern.ch