Development of Cogging at the Fermilab Booster

TL;DR

This paper discusses the development of magnetic cogging at Fermilab Booster, which aims to improve beam synchronization and reduce losses during high-intensity proton acceleration within the Proton Improvement Plan.

Contribution

It introduces a new magnetic cogging system that controls revolution frequency and gap position using dipole correctors, enhancing beam stability and reducing losses.

Findings

Magnetic cogging effectively synchronizes beam extraction with injection buckets.

The system reduces beam loss during high flux operations.

Progress on the development and implementation of the system is presented.

Abstract

The development of magnetic cogging is part of the Fermilab Booster upgrade within the Proton Improvement Plan (PIP). The Booster is going to send 2.25E17 protons/hour which is almost double the present flux, 1.4E17 protons/hour to the Main Injector (MI) and Recycler (RR). The extraction kicker gap has to synchronize to the MI and RR injection bucket in order to avoid a beam loss at the rising edge of the extraction and injection kickers. Magnetic cogging is able to control the revolution frequency and the position of the gap using the magnetic field from dipole correctors while radial position feedback keeps the beam at the central orbit. The new cogging is expected to reduce beam loss due to the orbit changes and reduce beam energy loss when the gap is created. The progress of the magnetic cogging system development is going to be discussed in this paper.