From carstens@jlabs1.cebaf.gov Mon Mar 23 18:04:23 1998
X-Sender: carstens@popmail.jlab.org
Date: Mon, 23 Mar 1998 18:04:00 -0500
To: Kostantin Loukachine <costy@cebaf.gov>
From: tom carstens <carstens@jlabs1.cebaf.gov>
Subject: Re: from Costy: the list of counters to look at.
Cc: elton@cebaf.gov
Mime-Version: 1.0
At 04:08 PM 3/16/98 -0500, you wrote:
>
> Hi Tom,
>
> Here there's the list of counters to fix:
>
> ------------------------------------------------------------
> sector counter problem comments
> ------------------------------------------------------------
>
> 1 16R no ADC, no TDC bad PMT ?
>
> 2 2R hot light leak ?
>
> 3 16R no ADC, no TDC bad PMT ?
>
> 5 21R no ADC, no TDC, bad HV divider ?
> no current
>
> 5 46BR no current bad HV divider ?
> ------------------------------------------------------------
>
> Costy.
>
>
Costy,
I worked on these TOF's over the weekend.
- I was unable to fix sector 1/16R. I replaced the voltage divider but now
the signal is very narrow. I was unable to replace the tube without taking
down the whole scintillator and I was unwilling to do that.
- Sec 2/2R is still unreachable.
- Sec 3/16R has it's tube unglued from the light guide and because it's
under the Chrenkov I can't get to it to reglue it.
- Sec 5/21R was repaired. (it had a bad voltage divider)
- Sec 5/46BR was repaired. (the SHV cable was disconnected)
Two other PMT's were damaged during the removal of the three Chrenkov's
but I was able to repair them so you shouldn't have any new problems.
Tom
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