Re: Updates to Hall D Detector Systems

["C. Cuevas" <cuevas@jlab.org>]

Greetings!

John Schaapman and Lars Holm 'scrutinized' my review of the Hall D 
Electronics, specifically covering the following sections:
WBS
1.5.4.1 FADC
1.5.4.2 TDC
1.5.4.4 Racks and Crates
1.5.4.5 Logic and High Voltage

I've included their comments below regarding channel counts:

[The following is our current understanding of channel counts. There are 
some significant changes if these are correct.
Photon Counter – 144ch fixed + 120ch moveable = 264 instead of 250 
yields 17 fADCs and 9 TDCs
Forward Drift anodes – 2,304ch instead of 2,900ch yields either 36 
64chTDCs or 32 72ch ADCs
Forward Drift cathodes – 9,216ch instead of 11,400ch yields 128 72ch ADCs
Cerenkov (gas) – 16ch – yields 1 fADC and 1 16ch CFD
BCAL – two possibilities
non-uniform 3,072ch total – 1,920ch inner yields 120 fADCs, 120 CFDs and 
60 TDCs
- 1,152ch outer yields 72 fADCs, 72 CFDs and 36 TDCs
uniform 4,224ch total - 264 fADCs, 264 CFDs and 132 TDCs
FCAL – 2,800ch yielding 175 fADCs ]

The latest summary table does not include the (gas) Cerenkov, and there 
are differences with the FCAL and BCAL channel counts as well.

Enjoy the weekend!

Chris
~~~~~~~~~~~~~~~~~~~~~~


Fernando J. Barbosa wrote:
> Hello Elke and everyone,
>
> I have uploaded an updated summary table for the Hall D detector 
> systems with updated information on the FDC and CDC detectors. A 
> similar summary table was last updated by Paul Smith on 8 June 2006.
>
> Please send me any updates on the various detector systems so I can 
> keep this table up-to-date.
>
> Thanks and best regards,
> Fernando
>