From: Dave Cockerill
Sent: 08 July 2005 16:57
To: 'Anfreville Marc'; Marc Georges Anfreville; Marc Dejardin; 'RANDER
John SMTP'; 'Bederede Didier'; Jean-Louis Faure
Cc: Joao Varela; Reyes Alemany Fernandez; ''; Wolfgang Funk; Philippe
Bloch; Tiziano Camporesi
Subject: A possible laser fibre mapping for EE to EE DCCs

Attachments: laser-update.ppt


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.