To: lctpc@desy.de
Subject: Summary WP#39 LP phonemeeting 19.09.2007  

Dear friends,

     Here is the draft summary for the last LP phonemeeting.  Please
let me know if you have any changes...

                                    Cheers,
                                            Ron

            WP#39 19/09/2007
           --------------------------------------------
   Wednesday 5 September 2007
  West Coast    East Coast      W.Europe       Japan
   07.00         10.00           16.00         23.00

Present:
--Paul Colas
--Ralph Diener
--Madhu Dixit
--Xavier Janssen
--Leif Joensson
--Dean Karlen
--Martin Killenberg
--Vincent Lepeltier
--Takeshi Matsuda
--Dan Peterson
--Peter Schade
--Oliver Schaefer
--Ron Settles
--Jan Timmermans
--anybody forgotten?





       Summary
     -----------------------
0.  News
-Sakue Yamada has accepted the position of Research Director for the ILC.

1. Cosmic trigger news
-As reported in the summary of WP#38 04/09/2007, INR Moscow will produce
our 15 paddles: the next meeting with them will be on Monday 24 Sept to
discuss some details. In the meantime, Takeshi is resolving internal (lctpc)
questions,
and Paul is having technical meetings in Saclay.
Takeshi will write a summary for us when everything is settled.  
For the MPPC, 15 will be delivered to Kek end Sept and 25 end Oct.

2.  LP1 fieldcage/endplate/electronics news:

-Dan has new items at his site:
http://w4.lns.cornell.edu/~dpp/linear_collider/LargePrototype.html
dated 2007-09-18: assembly drawings of Micromegasmodules-endplate-fieldcage
and 3Gem+gatemodules-endplate-fieldcage.  
-In the 2007-09-18 drawings, the flat endplate has been designed, Dan has 
changed the o-ring radius, the bolt size is being changed to 5mm or 6mm
(t.b.d.), a 19mm stiffening ring has been added. 
Dan's database has been set up to allow
modifying dimensions within about an hour if changes are needed.  Peter
has sent the latest dimensions of the fieldcage which have to 
be included in Dan's next update. 
-The shape of the o-ring groove, which has been moved to the endaplate, was
discussed: Dan showed some details dated 2007-08-21; Aleph used trapezoidal holes
with small side to the outside because the o-ring had to stay in place during
manipulation with the handling tool; after the meeting Oliver circulated 
to the lctpc list a thorough overview of o-ring technical issues based on
his studies. 
-Leif pointed out that we have to
agree in how to support the cables, possbily on the LP1-support-structure.
-Some dimensions on the Micromegas and resistive anode will be
settled by Paul, Madhu and Dan offline after the phonemeeting.
-Martin said that Bonn is preparing a pixel+timepix module and drawings
will be sent to Dan to start iterations.
-Dan pointed out that the 28mm from endplate-fieldcage sealing
surface to the center of the appropriate fieldcage strip is fixed and the same
for Gem and Micromegas.


3.  AOB

-Ron gave a talk on some detector issues at the IRENG07 ("IR engineering")
workshop at Slac this week.  
The slides are at http://mppmu.mpg.de/~settles/ireng07talk.ppt
and comments are welcome.
 
-Next phonemeeting in two weeks: 03.10.2007