Minutes of the Oct 16, 2009 Tevatron Dept Meeting

http://indico.fnal.gov/conferenceDisplay.py?confId=2851

* Weekly Operations Summary (Dan Bollinger) - The Tevatron delivered 52.8 pb-1
in 10 stores during the week.  All but the last store were terminated 
intentionally, and the last ended in a quench because of cryo related problems
at F1.  Problems dealt with during the week included high losses at D0 during 
the squeeze, longitudinal instabilities to both Protons and Pbars, and 
transverse emittance growth of the Protons.  Tuning continues to help with 
these issues.  Studies were done to check out the longitudinal dampers, and the
IPM.  There was also some time devoted to timing for the TEL 2 system.  The D0
collision point was moved by 300 microns during one store to get it back closer
to the nominal position.

* TEL 2 Studies (Giulio Stancari) - Plans and on going studies for the TEL 2
were presented.  The three uses for the TEL2 are to be used as a backup for 
TEL 1 for cleaning the Proton Abort Gap.  The next use is to study beam-beam 
compensation  using the currently installed Gaussian Gun.  Later, the TEL 2 
will transition to Collimation studies using a hollow beam.

Beam-beam compensation has been shown to reduce the tune spread by .01 units. 
The alignment of the electron beam is critical in this operation.

Plans to study  collimation with a hollow electron beam are  in the works.  The
hollow beam will only provide a  .06 microradian kick to the Proton halo 
particles while the present tungsten target provides a 17 microradian kick.  It
is clear that the hollow beam will have to work in pulsed mode to drive halo 
particles out resonantly.  The new BPMs are being studied in the Tevatron 
installation, and the hollow gun is in the test setup in the Linac Gallery.  
After all of the scheduled studies for the Gaussian gun are completed, an 
appropriate window of time will be used to install the hollow gun so that 
collimation studies can begin sometime next calendar year.

* Plan for next week

   - Deliver Luminosity
   - Reduce the emittance growth of the Protons
   - Eliminate the longitudinal instabilities
   - Tune Mult calibrations
   - P1 line Matching