[Halld-pid] Fwd: PMT choice for TOF

[Elton Smith]

Hi all,

See my comments attached. Cheers, Elton.

Elton Smith
Jefferson Lab MS 12H5
12000 Jefferson Ave
Suite #16
Newport News, VA 23606
(757) 269-7625
(757) 269-6331 fax


On 12/13/11 11:54 AM, Mark M. Ito wrote:
> Folks,
>
> Yesterday Beni sent out an email summarizing thinking on the choice of 
> phototubes for the TOF (see below).
>
> Recall that there is a problem with PMT lifetime for the high rate 
> counters near the beamline, especially at 10^8 photons/s. The choice 
> of PMT's is central to how we deal with this problem.
>
> Please have a look. He is asking for feedback so that we can make a 
> decision soon.
>
>   -- Mark
>
> -------- Original Message --------
> Subject: 	[Halld-pid] PMT choice for TOF
> Date: 	Mon, 12 Dec 2011 12:01:22 -0500
> From: 	Beni Zihlmann <zihlmann at jlab.org>
> To: 	halld-pid at jlab.org, Elton Smith <elton at jlab.org>, "Fernando J. 
> Barbosa" <barbosa at jlab.org>
>
>
>
> Dear colleagues,
> In order to make a final decision on the choice and strategy with regard to
> the PMTs for the TOF I put together a few facts and findings and ask for
> your
> opinion.
> Please read the attached outline set in 4 main paragraphs:
> Purpose, Facts, Calculations and Strategies
>
> I am advocating strategy a) where we go with a two phase approach.
>
> Let me know what you think and what makes the most sense. Depending
> on your answers we will either take a decision right away or I will call
> for a meeting at end of this week (beginning next) so that we can take a
> decision on this matter before Christmas.
>
>
> thanks everybody,
> Beni
>
>
>
>
>
>
> _______________________________________________
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> Halld-pid at jlab.org
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