Scheme for Low Energy Beam Transport with a non-neutralized section

TL;DR

This paper proposes a novel LEBT design that allows for a non-neutralized section downstream, reducing reliance on full space charge neutralization and potentially simplifying beam transport systems.

Contribution

It introduces a design approach enabling a non-neutralized LEBT section for modest perveance beams, challenging the conventional fully neutralized LEBT paradigm.

Findings

Non-neutralized section reduces emittance growth

Applicable to beams with modest perveance and uniform current density

Potential simplification of LEBT design and operation

Abstract

A typical Low Energy Beam Transport (LEBT) design relies on dynamics with nearly complete beam space charge neutralization over the entire length of the LEBT. This paper argues that, for a beam with modest perveance and uniform current density distribution when generated at the source, a downstream portion of the LEBT can be un-neutralized without significant emittance growth.