Beam dynamics at the main LEBT of RAON accelerator

TL;DR

This paper discusses the beam dynamics in the main Low Energy Beam Transport (LEBT) of the RAON accelerator, focusing on beam matching, lattice design, and error correction to optimize beam quality for the RFQ entrance.

Contribution

It introduces a new LEBT lattice design and presents methods for beam matching and orbit correction in the RAON accelerator.

Findings

Effective beam matching at the LEBT-RFQ interface.

Impact of errors on beam orbit and correction strategies.

Optimized lattice design for high-intensity beam transport.

Abstract

The high-intensity rare-isotope accelerator (RAON) of the Rare Isotope Science Project (RISP) in Daejeon, Korea, has been designed to accelerate multiple-charge-state beams. The ion beams, which are generated by Electron Cyclotron Resonance Ion Source (ECR-IS), will be transported through the main Low Energy Beam Transport (LEBT) system to the Radio Frequency Quadrupole (RFQ). While passing the beams through LEBT, we should keep the transverse beam size and longitudinal emittance small. Furthermore, the matching of required twiss parameter at the RFQ entrance will be performed by using electro-static quadrupoles at the main LEBT matching section which is from the multi-harmonic buncher (MHB) to the entrance of RFQ. We will briefly review the new aspects of main LEBT lattice and the beam matching at the main LEBT matching section will be presented. In addition, the effects of various errors on the beam orbit and the correction of distorted orbit will be discussed.