From: Frank Geurts (geurts_at_rice.edu)
Date: Sun Mar 16 2003 - 12:22:32 EST
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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