From: Frank Geurts (geurts_at_rice.edu)
Date: Sun May 18 2003 - 01:28:43 EDT
for the record ... i just talked to Patrica on the phone.
During 'normal' beam conditions the Iread values typically are 0 (which
means we have currents below 10nA). We can see higher values (up to
several hundereds of nA) during beam ramps or dumps. After a HV trip
you'll also see HV-ramping currents of ~450nA.
No problems, and the HV has been on all the time.
cheers,
frank
Fachini, Patricia wrote:
> Dear TOFr experts,
>
>
>
> If I look at the TOFr high voltage settings I see that
>
>
>
> High Voltage A- Iread
>
> High Voltage A+ Iread
>
> High Voltage B- Iread
>
> High Voltage B+ Iread
>
>
>
> Are all 0.
>
>
>
> This is the first time I see this. Usually, when the beam is beam ramped
> the alarm goes on and I see the higher values of HV in read, but then it
> turns yellow and eventually it gets back to the green value.
>
>
>
> I am on shift as the detector operator until 4:30pm.
>
>
>
> Thanks,
>
> Patricia
>
>
>
>
>
> ___________________________
>
> Patricia Fachini, Ph.D.
>
> Brookhaven National Laboratory
>
> pfachini_at_bnl.gov <mailto:pfachini_at_bnl.gov>
>
> 631-344-3975
>
>
>
>
>
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