E614 Collaboration Meeting
       April 24-25, 1998
       TRIUMF Auditorium.

 Decisions made:

 1. The 464 proposal decision ==> construct the chamber array with
this type of arrangement. Consider going to a modified version as
follows;

    Pair  Following  Gap distance   Gap distance
           Gap Size  to pair N+2    to pair N+4
            (cm)        (cm)           (cm)
     1      4.0         10.4           20.0
     2      6.4         10.0           20.4
     3      3.6          9.6           20.8
     4      6.0         10.4           21.2
     5      4.4         11.2
     6      6.8         10.8
     7      4.0
     8
 Availability of glass spacers must be assured. Monte Carlo of this type
of arrangement should be done.

 2. Muon tracking detector decision ==> It is necessary! Continue the
design studies.

 3. Scintillator trigger scheme decision ==> Great idea, adopt after
testing done.

 4. Gas degrader & pion stops as calibration sources ==> Monte Carlo
gas degrader, pion stopping calibration scheme and pion stopping as
source of unpolarized spectrum.

 5. Field wires/no field wires decision ==> All information are
favorable to chambers with No field wires, therefore chambers will be
constructed without field wires.

 Mechanical Design decisions:

        Subject           Decision
     Stack alignment       Hmm        New idea emerging
  6.  Lamel split           Yes
  7.  Anode signal          Yes        Soft-K cable.
      extraction                       = Kapton with strips.
     DME containment       Hmm        RTV vs DME test to come.
  8.  DME injection         Yes        Straw mounted from G10 support.
  9.  Motherboard design    Yes
 10. Motherboard support   Yes
     Signal extraction     Hmm        Cabling route & costs?
       from preamps
 11. Helium containment    Yes
 12. HV configuration      Yes        Anodes at voltage.
 13. Test pulse system     Yes        fire middle cathode plane.

 14. DME buffer zones decision ==> No buffer zones are required to
prevent helium diffusion into the chamber gases. More Garfield studies
are to be completed re the maintenance of flatness of the cathode
foils.

 15. Design of gas system ==> The design work is proceeding well,
it should continue.

 16. VTX & KIAE decision ==> The collaboration agreed that this
combination was our 1st choice and that we continue to pursue the
"free" VTX and finalize the KIAE design work.

 17. Target changing scheme with PC's in place ==> rejected because
it introduces too much material. There remains a need for a scheme for
changing targets in either case PCs or no PC's.

 18. Number of outer PC's ==> Increase outer PC number to 4 planes.

 19. Upstream vs downstream opening ==> Magnet and shield must remain
aligned to beam line and chambers will therefore be extracted by
moving(or removing) back shield plate.

 20. Suspending scheme ==> Rails need more investigation, in
particular the possibility of using a tubular support for rails.

 21. Data acquisition for E614 ==> MIDAS will be employed for this
purpose.

 22. Chamber construction schedule ==> The upstream half of the
chamber will be assembled as soon as possible. Construction of
chambers for and assembly of the 2nd half will begin when this has
taken place.

 23. Policy needed decision ==> Spokesmen/Institutional coordinators
will describe a policy.

 24. Making decisions between collaboration meetings ==> a conference
call
capability for E614 will be established.

 25. The next collaboration ==> The next collaboration meeting will be
held in the 1st two weeks of October. Documents destined for the
detector review submission will be discussed at this meeting.

-- 
*****************************************************
David R. Gill (drgill@triumf.ca)   (604) 221-3219
TRIUMF                              Fax  222-1074
Vancouver, BC
V6T 2A3

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