From: Wolfgang Funk [Wolfgang.Funk@cern.ch]
Sent: 12 July 2005 17:46
To: Dave Cockerill
Cc: Anfreville Marc; Marc Georges Anfreville; Marc Dejardin; RANDER John
SMTP; Bederede Didier; Jean-Louis Faure; Joao Varela; Reyes Alemany
Fernandez; K.W.Bell@rl.ac.uk; Philippe Bloch; Tiziano Camporesi
Subject: Re: A possible laser fibre mapping for EE to EE DCCs

Attachments: laser-update-wolf.ppt

Dear All,
I would like to propose another scheme (attached), which
still sticks to 200 fibers per LEVEL1, but needs 5 Level2 and 23 LEVEL1 
(please look description in the file). Is that possible from space, r/o 
and puchasing?
Cheers, Wolfgang


Dave Cockerill wrote:
> Attached are two slides, one showing the existing EE laser fibre 
> mappping, the second showing a possible solution to map fibres with 
> respect to the DCC boundaries.
> 
> The large numbers on the plots give the fibre number from the level 2 
> diffusers (the diffusers which sit upstream of the level 1 diffusers 
> which serve the crystals). On the 'current scheme' I have placed the 
> numbers to the best of my knowledge since I don't have a look up map.
> 
> On EE there are 4 level 2 diffusers, served by 4 fibres from the laser 
> barrack, per Dee.
> Each level 2 diffuser has a total of only 7 output fibres.
> 
> The proposed scheme looks possible from a fibre count and seeks to 
> maintain groupings radially, as far as possible, for uniformity of 
> irradiation by group.
> 
> Comments welcome,
> 
> Dave.