From: Eleanor Judd (egjudd_at_lbl.gov)
Date: Sun Mar 16 2003 - 13:37:01 EST
Hi guys,
Sorry for not keeping up with this. I was concentrating on FPD stuff and got
behind on my email. Frank, I am in my office at BNL (x5371) and I expect to be
out at the control room later on this afternoon (Sunday). I have never looked at
the TOF system before so I would prefer to do this with you. Are you on site and
available?
Eleanor
Frank Geurts wrote:
> it happens at random moments during a run: either after a few events,
> after a few hundred events or after a few thousand events. Bad
> connections might be a good reason and my understanding has always been
> that the rear connectors of these units are particular tight. A simple &
> quick access could at least affirm/solve or rule it out. Btw. 'we' don't
> hang daq it's the TCD that "hangs" us and daq ...
>
> I see there is a AtR power supply problem as we speak ... so how about
> access know??
>
> -frank
>
> W.J. Llope wrote:
> > hi again - i'm having a hard time visualizing how this could
> > be a cabling problem...
> >
> > we run run just fine at the beginning of a run, then we hang
> > daq. how does this cable(s) know to disconnect itself in the middle
> > of a run?
> >
> > thanks
> >
> > On Sun, 16 Mar 2003, Frank Geurts wrote:
> >
> >
> >>I suppose we are still waiting for an access in order to check the rear
> >>connector of the TOF TCD (Eleanor?). I would like to suggest STAR asking
> >>for an emergency access (~15min max) to fix this ... we have already
> >>lost two days of data and TOFp is considered to be a base line
> >>detector, right?
> >>
> >>
> >>W.J. Llope wrote:
> >>
> >>>hi guys,
> >>>last i heard we believed the present problem w/ tof (i.e. ,runs fine
> >>>for only first ~5k events than hangs DAQ) in run control was related to
> >>>our TCD (see msg from frank) or beyond, and eleanor was going to contact
> >>>freddy... did this happen? or someone know the latest status
> >>>on this? thanks
> >>> bill
> >>>
> >>
> >>Fred send out this email (cc'd to tofp_at_physics.rice.edu) Friday at 4h53pm:
> >>
> >>>fred bieser wrote:
> >>>
> >>>
> >>>>Te TOF's TCD has NO internal logic to generate busy except as brought in
> >>>>thru the front-panel LEMO labelled "DAQ Live." All the recent activity
> >>>>in that area might have left some cable loose or dropped or ???? either
> >>>>at the front or, more likely, in the rear.
> >>>>
> >>>>fred
> >>>>
> >>
> >>
> >>cheers,
> >>- Frank
> >>
> >>
> >>
> >
> >
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