Experimental Proof of Adjustable Single-Knob Ion Beam Emittance Partitioning

TL;DR

This paper demonstrates the first experimental method to arbitrarily transfer and re-partition ion beam emittances using a single adjustable magnetic field, enhancing phase space tailoring in accelerators.

Contribution

It introduces a novel emittance transfer technique that allows arbitrary emittance set adjustments with a single control parameter, unlike previous fixed exchange methods.

Findings

Successful experimental demonstration of emittance transfer along an ion beam line.

The transfer amount is controlled by a single magnetic field setting.

Final beam parameters are independent of the transfer amount.

Abstract

The performance of accelerators profits from phase space tailoring by coupling of planes. The previously applied techniques swap the emittances among the three planes but the set of available emittances is fixed. In contrast to these emittance exchange scenarios the emittance transfer scenario presented here allows for arbitrarily changing the set of emittances as long as the product of the emittances is preserved. This letter is on the first experimental demonstration of transverse emittance transfer along an ion beam line. The amount of transfer is chosen by setting just one single magnetic field value. The envelope-functions (beta) and -slopes (alpha) of the finally uncorrelated and re-partitioned beam at the exit of the transfer line do not depend on the amount of transfer.