Beam losses at injection energy and during acceleration in the Tevatron

Protons and anti-protons circulate on helical orbits in the Tevatron. At injection energy (150 GeV) the lifetimes of both species are significantly lower on the helical orbits compared to lifetimes on the central orbit but for different reasons. There are also significant beam losses in both beams when they are accelerated to top energy (980 GeV) - again for different reasons. We report on experimental studies to determine the reasons and on methods of improving the lifetimes and losses for both beams.