  A portion of the remnant Tevatron program infrastructure at Fermilab is being
reconfigured to be used for the generation and delivery of proton and muon
beams for new high-precision particle physics experiments. With the 8 GeV
Booster as its primary source, the Mu2e experiment will receive 8.9 GeV/c
bunched beam on target, after being stored and slow spilled from the Delivery
Ring (DR) -- a refurbished debuncher ring from Tevatron antiproton production.
For the Muon g-2 experiment, the DR will be tuned for 3.1 GeV/c to capture
muons off of a target before sending them to this experiment's Storage Ring.
The apertures in the beam transport systems are optimized for the large muon
beams of this lower-energy experiment. In order to provide further flexibility
in the operation of the DR for future possible low-energy, high intensity
particle physics experiments (REDTOP, for example) and detector development,
investigations are underway into the feasibility of decelerating beams from its
maximum kinetic energy of 8 GeV level to lower energies, down to 1-2 GeV. In
this paper we look at possible lattice modifications to the DR to avoid a
transition crossing during the deceleration process. Hardware requirements and
other operational implications of this scheme will also be discussed.
