[Bteam] notes from Wednesday's HOT Bteam meeting

[Arne Freyberger]

  B-team Meeting Agenda (2:00pm Wednesday MCC conf. room)


    1 2009-10-28 Wed 14:00 Agenda


      1.1 New BEM release Chris

Chris will describe the new BEM tool, including:

   1. Bugs/issues with old BEM
   2. New features, discussion of GOFF handling

    * Summary of discussion
      BTeam approved new tool. Chris will create an ATLIS and install
      this week.


      1.2 Beam Parity Quality during Happex-III Riad Happex

Brief (5-min) summary of the beam parity quality during Happex-III

    * Summary of discussion ATTACH
      As far as PQB, we met all of Happex-III's requirements. Same basic
      PQB requirements for PVDIS. Requirements tighten considerably for
      next year's PREx (and QWeak) Attached is Riad's short presentation.


      1.3 Hall-A

Continue discussion of Hall-A parity setup. Review new match data with 
raytrace data. Fast feedback issues. Feed forward to the upcoming 5-pass 
PVDIS setup.

    * Summary of discussion
      Match calculated on Friday
      <http://opsweb.acc.jlab.org/CSUEApps/elog/3-0/entry/1494245> was
      loaded Saturday Owls. No harm done. Stability improved after match
      loaded
      <http://opsweb.acc.jlab.org/CSUEApps/elog/3-0/entry/1494280>. 20%
      decrease in Compton counts and FFB working now. Not claiming that
      these effects were because of match, but we can claim that the
      effects occurred in spite of the match.

      Michele has sent BTeam an email with twiss plots and elog entries

    * Follow up
      After the plots were fixed, the beam size is under control (less
      than 200 ? m) in both the match and raw elegant displays.


      1.4 Energy Change plan Yan

Energy change to 6.068 GeV scheduled for Monday? Note: Hall-A will want 
as much current as the target cooling can handle. LEM should be 
performed with 700 ? A linac currents.


      1.5 Beam Studies coincident with Gun Bake

    * Bake date? To be determined.
    * Gun bake and recessiate SOURCE
    * MO ? f for 12 GeV Tief


      1.6 Injector Changes

The two wien modification is scheduled for the Winter2010 down. Part of 
the change includes the following decisions:

   1. Remove the 60Hz suppression correctors. These correctors were no
      longer connected to a source/controller.
   2. Use the 500 keV harp controls to drive the *new* harp at the 2nd
      Wien girder. The 500 keV harp has not provided the information we
      wanted at the 500 keV region due to unknown magnetic elements
      between the solenoid and harp.


      1.7 Optics-on-Call Summary

    * Adminstration

      Outgoing
          Yves Roblin 
      Incoming
          Byung Yunn 

    * Machine Status
          o Two power outages in one week
            Presently, ( 2009-10-27 Tue 07:37) we are recovering from
            the second inside the fence power outage in two weeks. How
            this will impact the schedule is still to be determined.
    * Scheduled program

      Somewhat tentative due to ongoing recovery from power outage.
      Still awaiting official word on date for energy change from 5.7
      GeV to 6.07 GeV.

          o ESR T1 turbine swap Thursday ( 2009-10-29 Thu)
          o ESR QWeak heat exchanger tests Fri-Sat ([2009-10-30 Fri]--
            2009-10-31 Sat)
          o Hall-B pass change from 1-pass to 5-pass.
          o Energy change to 6.068 GeV on Monday ( 2009-11-02 Mon)
          o Gun bake/activation on Monday Swing and Owl ( 2009-11-02
            Mon-- 2009-11-03 Tue)
          o MO ? f coincident with gun bake
          o Hall-A PVDIS experiment start Tuesday ( 2009-11-03 Tue)
          o As beam current ramps up to near 100 ? A, the FEL will have
            to been turned off to stay within the CHL capacity.

Date: 2009-10-30 09:50:53 EDT

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-- 
Arne Freyberger
Director Operations Department
Jefferson Lab           Phone: (757) 269-6268
12000 Jefferson Avenue  Pager: (757) 584-6268
Newport News, VA 23606  Email:  freyberg at jlab.org

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