A New Beam Injection Scheme for the Fermilab Booster

TL;DR

The paper proposes a novel beam injection scheme for Fermilab Booster that enhances beam brightness and reduces RF power consumption by maintaining beam emittance during injection, with additional methods to improve slip-stacking efficiency.

Contribution

It introduces a new injection method that preserves beam emittance and reduces RF power, along with a snap bunch rotation technique for better slip-stacking.

Findings

Efficient injection with no emittance dilution or beam loss.

RF power reduced by approximately 30%.

Improved slip-stacking efficiency through snap bunch rotation.

Abstract

A new beam injection scheme is proposed for the Fermilab Booster to increase beam brightness. The beam is injected on the deceleration part of the sinusoidal magnetic ramp and capture is started immediately after the injection. During the entire capture process we impose Pdot=0 in a changing B field. Beam dynamics simulations clearly show that this method is very efficient with no longitudinal beam emittance dilution and no beam loss. As a consequence of preserved emittance, the required RF power on a typical Booster cycle can be reduced by ~30% as compared with the scheme in current operation. Further, we also propose snap bunch rotation at extraction to reduce dP/P of the beam to improve the slip-stacking efficiency in MI/RR.