First observation of the exchange of transverse and longitudinal emittances

TL;DR

This paper reports the first direct experimental observation of exchanging transverse and longitudinal emittances in a particle beam using a novel beamline at Fermilab, demonstrating phase space manipulation.

Contribution

It presents the first experimental demonstration of transverse and longitudinal emittance exchange using a specialized beamline with a TM110 cavity and doglegs.

Findings

First direct observation of emittance exchange

Successful demonstration of phase space manipulation

Potential applications in beam quality control

Abstract

An experimental program to demonstrate a novel phase space manipulation in which the horizontal and longitudinal emittances of a particle beam are exchanged has been completed at the Fermilab A0 Photoinjector. A new beamline, consisting of a TM110 deflecting mode cavity flanked by two horizontally dispersive doglegs has been installed. We report on the first direct observation of transverse and longitudinal emittance exchange.