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User name R. Michaels
Log entry time 06:01:39 on January17,2009
Entry number 256457
This entry is a followup to: 256440
Followups:
keyword=re: alleged crosstalkJust as I told Xin I didn't see crosstalk (halog 256440) he pointed
out the end-run scaler summary which indicates difference between
BB and L-HRS which is ~zero for non-helicity scaler but sometimes
3 or 4% for some combination of target/helicty for run 5238.
But you have to look at the data differentially in time to
figure it out.
There are a jillion combinations, so I'll just focus on one.
This is T6/T7 alleged crosstalk. First, it's useless to study
target= -1 state because we had no HV-off time during that state.
Need a longer run and more patience.
Second, there is some marginal evidence of crosstalk, see fig 1.
I think huge transients can couple in lots of ways through the
electronics and you should cut them out. Need longer runs, proper
cuts to eliminate transition periods, and more careful analysis
if you are worried about this. In addition, if there was cross
talk of the type Kalyan described (i.e. on the cables from BB to L),
it would be seen the same on ALL the L-HRS scalers, and it seems
not to be. (prelim. conclusion from a zombie on owl shift).
FIGURE 1
