Notes from Main Injector/Recycler Group Meeting
Wednesday, 27 November 2002
Bruce C. Brown

Announcements:  Shekhar is away for an extended period.
		Stan Pruss is Acting Department Head.
		John Marriner is coordinating Recycler Ring Activities

A brief discussion of Abstracts for PAC03.

Discussion of Recycler Ring issues:

Martin Hu -- RR Momentum Aperture Measurements

Plots were presented showing the frequency spectrum from RR beam which
had had the momentum blown up by using a kicker.  Sharp edges were
interpreted as the limits of the acceptance.  The frequency range of
the beam was interpreted to show an admittance of 0.45% between the
steep edges.  Data from 7/10/02 was displayed for which the logbook
comment was that the acceptance was 1% but the analysis by Martin
indicated 0.54% acceptance.  Other measurements done by changing the
RF frequency and then kicking the beam or measurements with bunched
beam giving acceptance vs. frequency were also displayed.  

John Marriner summarized the situation with the comment that the
results implied a momentum acceptance between 0.4 and 0.9% with the
resolution of that difference remaining as a priority.  Bill Foster
will look for old measurements in the logbook.  A study plan for 
momentum acceptance measurements will be developed.

John Marriner -- RR Study Plans

We will try to use available MI Group personnel who are not otherwise
committed to man most of the shifts beginning on Monday.  We will get
organized and try to bring people in on Sunday of the Thanksgiving
weekend.  Those who volunteered will be called when a schedule has
been established.  Priority will be to further study the momentum
acceptance of the RR followed by transverse acceptance measurements.
The scraper measurements are limited by the fact that the noise source
cannot be used since the detector plates are being used as the
detector for the Beam Line Tuner.  The RR HLRF improvements now show
progress.  Beam between barrier buckets is mostly flat with a small
distortion near each barrier.  Completion status of the HLRF work was
not available at meeting time.