Delivery Ring Lattice Modifications For Transitionless Deceleration

TL;DR

This paper explores lattice modifications to the Delivery Ring at Fermilab to enable transitionless deceleration of proton and muon beams from 8 GeV to lower energies, enhancing flexibility for future experiments.

Contribution

It proposes specific lattice modifications to prevent transition crossing during beam deceleration, facilitating flexible energy tuning for various particle physics experiments.

Findings

Feasibility of lattice modifications for transitionless deceleration.

Operational implications and hardware requirements analyzed.

Potential to support future low-energy experiments.

Abstract

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.