Make New Entry, Make Followup Entry
User name R. Michaels
Log entry time 21:25:46 on September 8,2009
Entry number 288680
This entry is a followup to: 288665
Followups:
keyword=18-bit ADC and BPM10.BPM10 in the new ADC18 seems ok. For this run (12157) there was
a beam instability in the beginning and some trips, but cutting
those we see 85 k channels. Looking back at an older run (12099)
the 16-bit ADC was at 37K, which means the voltage is typically
2.85 Volts (assuming full-scale is 5 V). So this means the ADC18
can reach 7.7 Volts, which may be enough for BPM12 to not saturate
and consistent within my approx. with Luis's conclusions.
I think we can put BPM12 there. See if others agree ...
Fig 1 -- BPM10 raw antenna from run 12157 with cleanup cuts (beam on,
cut out jump at start)
Fig 2 -- BPM10 correlates to BPM12. Bcm2 is still working (ADC18).
FIGURE 1
FIGURE 2
