Minutes of the March 21, 2008 Tevatron Dept Meeting

http://indico.fnal.gov/conferenceDisplay.py?confId=1675

* News (Ron) - Congratulations to us!  We set a weekly delivered luminosity
record of 46.5 pb-1 for our official Monday-to-Monday reporting week
(March 10-17).  Over the past 7 days (midnight-to-midnight March 14-21) we
have delivered 52.2 pb^-1 to CDF and D0.  The Tevatron also set a peak
luminosity record of 313 ub^-1/s in store 5989 - breaking "300" for the first
time.  Jerry Annala will be acting Dept Head in Ron's absence March 22-26.

* Weekly Operations Summary (Andreas Jansson) - There were 7 HEP stores
this week with initial luminosities between 232 to 313 ub^-1/s.  Only store
5896 was lost unintentionally after the B0Q6 supply tripped and caused a 
quench; a water leak was fixed and a firing card replaced, but this supply
has history of rare, mysterious trips (QPM heartbeat?)  The A17H separator 
sparked early in store 5990 and caused a 15% drop in instantaneous luminosity.
The E17 Schottky proton vertical channel was returning unreliable tunes; a bad
electronics component was found and replaced.  The BLT injection closure was 
hung for a couple of stores; the problem seems to happen on Saturday mornings
for some reason.  The A4 wet engine inverter needs to be replaced.  
The Tevatron injection energy was tweaked by 20 MeV to better match the Main 
Injector's 150 GeV level.  The new orbit stabilization program has been running
OK; the automatic smooth at initiate collisions will be working for the next 
shot.  We need to decide on more robust operational guidelines on using 
injection mis-steering and the PBJ to blow-up pbar emittances - use only PBJ, 
both, and/or modify PBJ duration on the fly to obtain a constant brightness 
from store-to-store?

* P1 Line Matching to Tevatron (Alex Valishev) - Alex and Valeri looked at
the P1 optics since it was last done in 2003 and we wanted to reduce any
sources of proton emittance dilution.  Their analysis shows a horizontal
dispersion mismatch that leads to ~10% emittance dilution upon injection.  The
beta functions appear to be well-matched.  They are ready to try their
suggested P1 line quad current changes to reduce the dispersion mismatch.

* Plan for Next Week

   - Keep up the record delivered luminosity!
   - PBJ tests (Tan, Jim Steimel - end of HEP store)
   - P1 Line matching (Alex, Val, Jerry - 2 hr proton-only)