Re: Gas Cherenkov - some info on the costs

[Elke-Caroline Aschenauer <elke@jlab.org>]

Hall D PID Mail List:

On Wed, 18 Apr 2007, gen wrote:

Dear Eugene,

thanks, for looking into it. I'm waiting also for the price Brian has for
the gas system. Actually I'm suprised it is so cheap, currently in the
costbook we have 140k$.
Actually the purity of the gas we had from kidde deugra was fine
(100$/kg, the company in england is more expensive). The problem for us
was that we had no recirculation system so we used 10kg C4F10 / week,
due to loses in the system and that we stabilized the pressure of
the c4f10 roughly to the outside air pressure to keep the response stable.

Tim looked in the box and it is in the order of 100k$, than we need PMTs
and mounting structures for the mirrors and the PMTs.
So we are getting closer to a cost estimate.

Thanks again, cheers elke


> Date: Wed, 18 Apr 2007 17:41:27 -0400
> From: gen <gen@jlab.org>
> To: halld-pid@jlab.org
> Subject: Gas Cherenkov - some info on the costs
>
> Hall D PID Mail List:
>
>
> I found some information concerning the mirrors and gas purification
> from a Hall A group developing a threshold Cherenkov with a C4F10 radiator.
> The figures come from Nov,2006.
>
> At FNAL and Hall B the purification is done by simple and cheap
> filters. It seems that the cost can be in a 10k range. The gas was $200/kg.
> The mirrors were $500 per a 30x30cm**2.
>
> This may translate to:
> a) gas: 300kg needed to fill the box = $60k. We would need probably
>    50% more, so an estimate is $100k
> b) purification: 20k
> c) mirrors - there are several companies willing to build and coat small
>    mirrors (30x30cm**2). Some provide a good quality surface just from
>    the mold. One may consider making a mosaic from about 200 mirrors
>    (50 for the 1-st ring and 150 for the 2-nd): $100k in total.
>    CERN can coat larger mirrors, but will ask for more money/mirror.
>
> In summary, gas+mirrors amount to $220k
>
> Eugene
>

 ( `,_' )+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=
  )    `\                                                  -
 /    '. |                                                  +
 |       `,              Elke-Caroline Aschenauer            =
  \,_  `-/                                                    -
  ,&&&&&V         Jefferson Lab                                +
 ,&&&&&&&&:       HALL-D 12C / F381       121-A Atlantic Avenue =
,&&&&&&&&&&;      Mailstop: 12H5          Hampton, VA 23664      -
|  |&&&&&&&;\     12000 Jefferson Ave                             +
|  |       :_) _  Newport News, VA 23606  Tel.:  001-757-224-1216  =
|  |       ;--' | Mail:  elke@jlab.org    Mobil: 001-757-256-5224   -
'--'   `-.--.   |                                                    +
   \_    |  |---' Tel.:  001-757-269-5352                             =
     `-._\__/     Fax.:  001-757-269-6248                              -
            +=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+