Third interger resonance slow extraction scheme for a mu->e experiment at Fermilab

TL;DR

This paper proposes a new third integer resonance slow extraction scheme for a mu->e experiment at Fermilab, utilizing RF knock-out to improve beam quality at high intensities, with simulation results demonstrating its effectiveness.

Contribution

It introduces a novel extraction method using RF knock-out for high-intensity proton beams in mu->e experiments, addressing challenges of beam quality and losses.

Findings

Simulations show effective spill uniformity at high tune spreads.

RF knock-out assists in managing large space charge effects.

The scheme enables higher beam intensities with controlled losses.

Abstract

The current design of beam preparation for a proposed mu->e conversion experiment at Fermilab is based on slow resonant extraction of protons from the Debuncher. The Debuncher ring will have to operate with beam intensities of 3 x 10**12 particles, approximately four orders of magnitude larger than its current value. The most challenging requirements on the beam quality are the spill uniformity and low losses in the presence of large space charge and momentum spread. We present results from simulations of third integer resonance extraction assisted by RF knock-out (RFKO), a technique developed for medical accelerators. Tune spreads up to 0.05 have been considered.