Re: [Brahms-dev-l] Re: [Brahms-l] Pedestal Calibrations

Dear Claus

I think for most detectors we have probably been to stringent with the
pedestal rejection criteria;
for most scint (tof's, triggers) the signals are much wider intrinsic
widhts, an a sigma of 20 rather then 5 in ped does
not matter, for the Cherenkovs it is a different matter.

For the mentioned tofw I certainly know that Dana would prefer to keep them,
timing+slewing should still be
fine even with sigma of 20. My own preference is not to mark all bad but
rather as indicated change the
default cut.

Flemming
----------------------------------------------------------------
Flemming Videbaek
Physics Department
Brookhaven National Laboratory

e-mail: videbaek@bnl.gov
phone: 631-344-4106
----- Original Message ----- 
From: "Claus O. E. Jorgensen" <ekman@nbi.dk>
To: "brahms-dev-l" <brahms-dev-l@lists.bnl.gov>
Sent: Monday, March 08, 2004 10:11 PM
Subject: [Brahms-dev-l] Re: [Brahms-l] Pedestal Calibrations


>
> Hi,
>
> I've made pedestal calibrations for all runs from 9345 to 9900 and they
> are now in the db. The calibrated detectors are:
>
> BBL, BBR, ZDCL, ZDCR, TOF1, TOF2, TOFW, TFW2, RICH, TRMRS, TRFS
>
> - When was C1 put in/taken out? I did the calibrations, but I didn't
> commit anything to the db yet. The C4 pedestal calibrations have already
> been comitted (I guess Eun-Joo have done this).
>
> - A few tof channels have a pretty wide pedestal above the 10 channel
> width limit but still below ~20. The width of these pedestals fluctuate a
> bit which means that in some of the runs the ped calibration is invalid
> (-1111), while in other runs it's valid. So far I've just comitted what
> the calib module gives, but maybe we should give these channels an invalid
> calibration for all the runs. The channels are: tof1 top 32, tof2 bot 2,
> tofw top 98, tofw bot 31.
>
> - There's no data in ZDC, TRMRS or TRFS data in pedestal runs 9670, 9698
> and 9727. The pedestals are pretty stable so I've just skipped these runs.
>
> I'll continue tomorrow.
>
> Cheers,
>
> Claus
>
>
>
>
>
>
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