A Simple Transition-Free Lattice of an 8 Gev Proton Synchrotron

TL;DR

This paper presents a simple, transition-free lattice design for an 8 GeV proton synchrotron, aiming to reduce beam losses and improve operational stability in high-intensity accelerators.

Contribution

It introduces a novel, straightforward lattice design with a triangular shape, using only one type of dipoles and quadrupoles, eliminating transition crossing in a 8 GeV proton synchrotron.

Findings

Design achieves no transition crossing

Lattice has large dynamic aperture and low beta-functions

Provides ample space for correction and diagnostics

Abstract

A transition-free lattice is a basic requirement of a high-intensity medium-energy (several GeV) proton synchrotron in order to eliminate beam losses during transition crossing. An 8 GeV synchrotron is proposed as a principal component in an alternative hybrid design of Project-X [1]. This machine would be housed in the Fermilab antiproton source enclosure replacing the present Debuncher. A simple doublet lattice with high transition gamma has been designed. It uses just one type of dipoles and one type of quadrupoles (QF and QD are of the same length). It has no transition crossing. It has a triangular shape with three zero dispersion straight sections, which can be used for injection, extraction, RF and collimators. The beta-functions and dispersion are low. This lattice has plenty of free space for correctors and diagnostic devices, as well as good optical properties including large dynamic aperture, weak dependence of lattice functions on amplitude and momentum deviation.