From settles@mppmu.mpg.de Wed Jul 11 14:09:46 2007
Date: Wed, 11 Jul 2007 14:08:11 +0200 (CEST)
From: Ronald Dean Settles <settles@mppmu.mpg.de>
To: lctpc@desy.de
Subject: Reminder: WP#34 phonemeeting today


Dear lctpc friends,
                   The agenda for today's meeting is unchanged; I have
attached a drawing of a possible trigger setup Klaus sent a few days ago
and a drawing of the T2K counters Dean sent two weeks ago, for your
information.  Both Dean and Klaus will not be able to attend today,
but some of you have not seen them and may have input...

    Be talking to you later,
                             Ron

            WP#34 11/07/2007
           --------------------------------------------
   Wednesday 11 July 2007
  West Coast    East Coast      W.Europe       Japan
   07.00         10.00           16.00         23.00

To join,
     dial +494089981390, after a few seconds into an answer in German,
type the code number 52872# (LCTPC#).

       Agenda
     --------------------
1.  Cosmic trigger, any news?

--Responsibilities:
    Basic design: Klaus Dehmelt
    Purchasing and fabrication of the scintillator slabs
        plus light fibres: Paul Colas
    Electronics and power supply: perhaps Paul Colas
        (or the CDC group) (under discussion)
    MPPC: CDC group
    Assembly and Lab test: perhaps Saclay (under discussion)
    Support and installation at Desy: Klaus Dehmelt
    Schedule: ready beginning 2008.

2.  LP1 fieldcage/endplate, any news?

a. From last meeting, the summary:
---magnet inner bore                     850mm ID
--SiLC detectors (see phonemeeting #27)   35mm on radius
--clearance inside of SiLC               780mm
--extra clearance (see phonemeeting #27)   5mm on radius
--OD of field cage                       770mm
--field cage wall                         25mm
--ID of field cage                       720mm
--module insertion clearance to field cage 3mm on radius
--"stay clear" diameter                  714mm
--40 bolts, 6mm x 1mm, with bolts in the vertical and horizontal positions
   and 4 pin positions in the field cage.

b. From last meeting, other design parameters on which we must agree:
1) bolt circle radius for the 40 M6 bolts
   (this is 376mm in the drawing shown on the web page),
2) whether the o-ring groove placed in the field cage flange of in the
   endplate,
3) o-ring size and radial location
   (this is a 4mm grove, with IR=365mm,  in the drawing on the web page),
4) location of the first field shaping band
   (this 35mm, to the edge of the first band, in the drawing on the web
   page),
5) location of the field shaping band that defines the end of the drift
   field (this determines the step in the endplate),
6) endcap-flatness specs,
7) gas seal test should be made in a G-10 field cage flange,
8) gas seal overpressure: 2mbar,
9) stress-relief tests done: results?
10) cable supports: brackets to be included,
11) gas inlet/outlet: TBD,
12) temperature stability/cooling: tolerance TBD.

3. AOB

Next meeting: LCTPC Electronics 25.07.2007
    [ Part 2, ""  Application/PDF  50KB. ]

    [ Unable to print this part. ]


    [ Part 3, ""  Image/JPEG  48KB. ]

    [ Unable to print this part. ]