Draft Summary: WP#35 26.7.2007 on LCTPC electronics


Dear LCTPC friends,
                     Here is a draft summary of the electronics
meetings on 24.07.2007.  Comments are welcome.

       Best greetings,
                         Luciano and Ron

          WP#35: LCTPC electronics meeting 26July'07
           ----------------------------------------------------
   Thursday 14 June 2007 and 26 July 2007
  West Coast    East Coast      W.Europe       Japan
   07.00         10.00           16.00         23.00

     Agenda 
     --------------------

1. Noise figures of the new preamplifier          - Gerd 
2. Production of ALTRO chips                      - Luciano
3. Distribution of clock and trigger
   signals to the RCU                             - Leif/Luciano
4. AOB

       Reminder of the suggested steps this year:

     --June 14: Video/phone meeting with prepared talks.
     --July 26: Video/phone meeting with prepared talks.
     --After the October 8-10 Eudet annual meeting in Paris,
       face-to-face "Advanced-endcap" meeting on October 10 afternoon
       and October 11 morning with prepared talks.


Attendees 
---------
-Dan Peterson
-Eric  Delagne
-Jan Timmermans
-Madhu Dixit
-Jean-Pierre Martin
-Takeshi Matsuda
-Keisuke Fujii
-Leif Joensson 
-Anders Oskarsson
-Ulf Mjoernmark
-Lennart Osterman
-Xavier Janssen
-Luciano Musa
-Gerd Trampitsch
-Hugo Franca Santos 
-Attiq Ur Rehman
-Peter Buchholz
-Yuanning Gao

-anybody forgotten?
 
    Summary 
    ----------------
The talks are avalable at
http://ilcagenda.linearcollider.org/conferenceDisplay.py?confId=1786

1.  See ILC_report_260707.ppt. Gerd reviewed again the properties of the 
new PCA for LP1. 
     Leif had asked for details of the pin layout, seen on slide 2.
Following up on Jean-Pierre's question under 1b above, Gerd showed
the noise performance expected on slide 4 for the "standard" architecture. 
The preamp_out mode bypasses pole-zero and first shaping stages and the 
"no-shaper" properties follow in slides 7-10.  The noise after the preamp 
is better understood now as seen on slide 9
(which assumes zero digital noise) showing an overall weak dependence on 
the feedback resistance. The preamp noise perfomance is quite good for 
long preamp decay (slide 10).  Madhu thought thought the decay time should 
be about 2 mircroseconds.

2. See altro_production.ppt. The tests of the new Altro at Lund by 
Lennart et al gave 86% yield which gives enough left over after Star, 
MIPP and Alice for the LP1 (10000 channels).

3. See new_fec_open questions.ppt.
Luciano answered "private" questions by Leif (not seen by most of us).

4. AOB. Some financial details about the connectors (Takeshi will talk 
to the Japanese company), purchase of Altros (transfer of CDC money) and 
extra money for LP/SP (Madhu is submitting a proposal).
        Finally, CERN is putting more expertise into the development of
the new PASA/Altro/FEC/etc; details will follow.