Minutes of the June 19, 2009 Tevatron Dept Meeting

http://indico.fnal.gov/conferenceDisplay.py?confId=2638

* Operations Summary (Jerry Annala) - For the 9 days leading into the start
of the shutdown, the Tevatron delivered over 53 pb^-1. There were 11 stores 
with initial luminosities between 232 and 296 ub^-1/s.  Only store 7119 was 
lost unintentionally not even 1 hour into the store when noise from the A3 
main power supply caused the QPM to think there was a quench and pulled the 
abort; it turned out a water leak was spraying onto SCR firing cards within 
the supply.  The QE28 ramp card was replaced after it play some ramps at the 
wrong time.  During a study, the BPMs were found not to work in continous 
injection mode.  There are 5 higher-order circuits that have a high ground 
current - they will be investigated during the shutdown.

* Shutdown Status (Jim Volk) - A3 and D3 are at room temperature for cold leak
repairs.  The rest of the Tevatron is up to 80K.  As-found surveys of the CDF
and D0 low-betas are complete.  Roll measurements of magnets around the ring 
are complete, data being crunched.  A B2 magnet was removed from the E0
straight section was removed in preparation for installation of a vertical
crystal collimator.

* P1 Line Matching to Tevatron (Alex Valishev) - Alex summarized the studies
done to understand why the proton emittances seem to jumping up.  Differential
orbits in Tevatron - P1 line - Main Injector agree well with the models; I:H102
is an exception in the MI.  Assuming the MI optics *at extraction* agree with
the design optics, any emittance growth caused by a beta-function mismatch is
1-2 pi mm mrad.  Correcting the P1 line optics caused no change in the proton
emittances measured in the Tevatron.

* HEP Results for Accelerator Folks (Rob Roser) - Rob gave a nice overview
motivating why the experiments need the luminosity we deliver and some recent
physics results.  Let's keep it coming!

* Plan for the Shutdown - fix what we can and do it safely so we can come up
efficiently and deliver luminosity!