[Sbs] attention Mahbub

[Charles F. Perdrisat]

On 12/18/2013 11:10 AM, Bogdan Wojtsekhowski wrote:
> Hello everybody,
>
> It is not exactly correct 80x360, because we will use
> 4.2 cm x 4.3 cm blocks for first 1000 and 4 cm x 4 cm for
> next 700 and hopefully at least 300 3.7 cm x 3.8 cm
> So, the area is larger and arranged in C-shaped.
> The actual shape of the CDET can follow C-shape.
> However, the vertical size is limited by 300 cm as it was
> in GEM-based plan. Larger vertical size require extra
> funding.
>
> ----- Original Message -----
> From: "Charles F. Perdrisat" <perdrisa at jlab.org>
> To: sbs at jlab.org
> Sent: Wednesday, December 18, 2013 10:55:56 AM
> Subject: [Sbs] attention Mahbub
>
> Mahbub, I can't attend the meeting attend today, but need to caution you
> that the size of the coordinate detector needed for GEp(5), although not
> frozen at this point, is likely to be about 80x360 cm^2, if we just use
> the lead glass from BigCal, or larger if we find more bars /PM/bases.
> Regards. Charles
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Od course it is not exactly right, and neither are Bogdan's number 
right. In fact the Protvino glass is 3.8x3.8, and the Yerevan glass used 
in GEp(3) is 4.0x4.0.
Charles