Beam Dynamics Studies for the HIE-ISOLDE Linac at CERN

TL;DR

This paper presents a beam dynamics study for the HIE-ISOLDE linac upgrade at CERN, demonstrating the feasibility of accelerating ions to higher energies with minimal emittance growth using superconducting resonators.

Contribution

It introduces a detailed beam dynamics analysis including realistic field modeling and error studies for the HIE-ISOLDE superconducting linac upgrade.

Findings

Confirmed the ability to accelerate ions to >10 MeV/u with minimal emittance increase.

Developed realistic field models for QWRs and solenoids.

Performed error analysis to guide manufacturing and alignment tolerances.

Abstract

The upgrade of the normal conducting (NC) Radioactive Ion Beam EXperiment (REX)-ISOLDE heavy ion accelerator at CERN, under the High Intensity and Energy (HIE)-ISOLDE framework, proposes the use of superconducting (SC) quarter-wave resonators (QWRs) to increase the energy capability of the facility from 3 MeV/u to beyond 10 MeV/u. A beam dynamics study of a lattice design comprising SC QWRs and SC solenoids has confirmed the design's ability to accelerate ions, with a mass-to-charge ratio in the range 2.5 < A/q < 4.5, to the target energy with a minimal emittance increase. We report on the development of this study to include the implementation of realistic fields within the QWRs and solenoids. A preliminary error study is presented in order to constrain tolerances on the manufacturing and alignment of the linac.