Speaker
Mary Convery
(Fermilab)
Description
We present the strategy which has been used recently to optimize
integrated luminosity at the Fermilab Tevatron proton-antiproton
collider. We use a relatively simple model where we keep the proton
intensity fixed, use parameters from fits to the luminosity decay of
recent stores as a function of initial antiproton intensity (stash
size), and vary the stash size to optimize the integrated luminosity
per week. The model assumes a fixed rate of antiproton production, that
a store is terminated as soon as the target stash size for the next
store is reached, and that the only downtime is due to store
turn-around time. An optimal range of stash sizes is predicted. Since
the start of Tevatron operations based on this procedure, we have seen
an improvement of approximately 35% in integrated luminosity. Other
recent operational improvements have been achieved by decreasing the
shot-setup time and by reducing beam-beam effects by making the proton
and antiproton brightnesses more compatible, for example by scraping
protons to smaller emittances.
Author
Mary Convery
(Fermilab)
Co-author
Cons Gattuso
(Fermilab)
