From: Wolfgang.Funk@cern.ch on behalf of Wolfgang Funk
[Wolfgang.Funk@cern.ch]
Sent: 26 September 2003 10:20
To: Greg.Heath@bristol.ac.uk; Dave.Cockerill@cern.ch; K.W.Bell@rl.ac.uk;
Helen.Heath@bristol.ac.uk; J.Greenhalgh@rl.ac.uk; R.M.Brown@rl.ac.uk;
jean-louis.faure@cern.ch; A.B.Lodge@rl.ac.uk; Lucie.Linssen@cern.ch;
Philippe.Bloch@cern.ch
Subject: Re: number of yellow ribbons for EE

Categories: CERN SpamKiller Note: -49


Dear all,
thanks to the further comments of Greg and Tony, I corrected the mistake
of Irakli (as Greg suggested), I counted for the lost strip in the
halfsector for the partial SCs and 
I added the ribbons for the MEM boxes.

Assuming the latest layout of the'mechatronics', the assumptions I made
with Tony about partial supercrystals (please get coloured copies from
Ken!) and the information about
triggertowers  and TCCs from the presentation from Irakli (6/3/2003)
(note that there is a mistake in drawing 6/21 sector 6 TCC subsector4 ). 
For the numbering of the data sectors please see under
http://hepwww.rl.ac.uk/CMSecal/Installation.htm, 2002 YE1 Integration
EDR talk, page 23
I arrive at the following numbers:

sector 9: 31 full FEs + 2 FEs (3partial SCs)      =33FEs
sector 8: 29 full FEs + 3 FEs (6partial SCs)      =32FEs
sector 7: 32 full FEs + 2 FEs (2partial SCs)      =34FEs
sector 6: 31 full FEs + 2 FEs (5partial SCs)      = 33FEs
halfsector 5: 15 full FEs + 1 FEs (2partial SCs) =16FEs


**************************************************************
                                DATA ribbons: 
The total number of FEs per sector corresponds exactly to the number of
data pigtails. (Greg: the number of SCs does not determine the number of
pigtails!)
sector 9: #data yellow ribbons: 33/12=3          3 pigtails free
sector 8: #data yellow ribbons: 32/12=3          4 pigtails free
sector 7: #data yellow ribbons: 34/12=3          2 pigtails free
sector 6: #data yellow ribbons: 33/12=3          3 pigtails free
halfsector 5: #data yellow ribbons: 16/12=2    4 pigtails free

SUM per Dee: 14
So there is some space free inside the ribbons (minimum 2 per sector)
No spares ribbons yet counted!


*************************************************************
                   TRIGGER  ribbons:
(assuming the trigger distribution of Irakli), which has several
mistakes (ask Greg or me)!
Each sector has 4 TCC subsectors,where TCC subsectors sometimes 
overcross data sectors.
Each FE-card has 5 trigger pigtails. Due to missmatch of TCC subsectors
and data sectors, some FEs deliver trigger data to different TCC
subsectors or even to different sectors. 

I assume HERE that each triggertower has one pigtail 
(no averaging of channels in partial SCs
assumed), which is the worst case concerning number of pigtails.

Numbering of TCC subsectors are starting from inside to outside and is
going
in +phi direction. 
(e.g. sector9 TCC1 is the outer TCC subsector at the straight sector
border 
(called by Greg 18 outer), 
sector 9 TCC2 is the inner TCC subsector at the straight sector border 
(called by Greg 18 inner), 
sector9 TCC3 is the outer TCC subsector next to TCC1 in +phi direction 
(called by Greg 17 outer),
 etc.. Greg's namings are now added!
sector 9:  TCC1: 41 pigtails/12=4 ribbons  trigger sector 18 outer 
sector 9:  TCC2: 41 pigtails/12=4 ribbons  trigger sector 18 inner
sector 9:  TCC3: 40 pigtails/12=4 ribbons  trigger sector 17 outer
sector 9:  TCC4: 40 pigtails/12=4 ribbons  trigger sector 17 inner 

sector 8:  TCC1: 41 pigtails/12=4 ribbons  trigger sector 16 outer
sector 8:  TCC2: 40 pigtails/12=4 ribbons  trigger sector 16 inner
sector 8:  TCC3: 39 pigtails/12=4 ribbons  trigger sector 15 outer
sector 8:  TCC4: 40 pigtails/12=4 ribbons  trigger sector 15 inner  
before: 39 was wrong

sector 7:  TCC1: 46 pigtails/12=4 ribbons  trigger sector 14 outer  
before: 38 was wrong, in Irakli's drawing it is 48!
sector 7:  TCC2: 42 pigtails/12=4 ribbons  trigger sector 14 inner
in Irakli's drawing it is 40!
sector 7:  TCC3: 39 pigtails/12=4 ribbons  trigger sector 13 outer
sector 7:  TCC4: 40 pigtails/12=4 ribbons  trigger sector 13 inner

sector 6:  TCC1: 41 pigtails/12=4 ribbons  trigger sector 12 outer
sector 6:  TCC2: 40 pigtails/12=4 ribbons  trigger sector 12 inner
sector 6:  TCC3: 40 pigtails/12=4 ribbons  trigger sector 11 outer
sector 6:  TCC4: 40 pigtails/12=4 ribbons  trigger sector 11 inner  
before: 38 was wrong

halfsector 5:  TCC1: 41 pigtails/12=4 ribbons   trigger sector 10 outer
halfsector 5:  TCC2: 40 pigtails/12=4 ribbons   trigger sector 10 inner
was before 41 but 1 lost strip due to 
combination of the partial SCs at the inside and outside into one FE

SUM per Dee: 72
There are in general some pigtails in the needed ribbons free for spare 
with exception of one TCC subsector. (14 outer)


************************************************************
                                  CONTROL ribbons:
Each data sector has 4 token rings, a half sector has 2 token rings.
This means max 34 FEs inside 4 rings, max 9 FEs in a ring.
sector 9, 8, 7, 6 eactly 4 yellow ribbons , half sector 5, 2 yellow
ribbons.

SUM per Dee: 18
No spares ribbons yet counted!


************************************************************
                                  MEM data ribbons:
Each double MEM box has 2x2 data pigtails, which will end up in 1 yellow
ribbon per Dee (double MEM box).

SUM per Dee: 1
No spares ribbons yet counted!


***************************************************************
TOTAL SUM of yellow ribbons per Dee:  14+72+18+1=105 (in cabling mockup
up
to now: 120 (spares!) 
per Quadrant: 52/53
for both EEs: 420  (number to be ordered plus spares!)
No spares ribbons yet counted!
***************************************************************

Thank you very much,
Wolfgang