Injection method of barrier bucket supported by off-aligned electron cooling for CRing of HIAF

TL;DR

This paper proposes a novel injection method using a fixed barrier bucket supported by off-aligned electron cooling to increase beam intensity in HIAF's CRing, supported by simulation results.

Contribution

It introduces an innovative injection technique combining barrier buckets and off-aligned electron cooling, enhancing beam stacking efficiency in HIAF.

Findings

Simulation demonstrates improved stacking efficiency.

Off-alignment reduces transverse emittance.

Method potentially doubles intensity gain.

Abstract

A new accelerator complex, HIAF (the High Intensity Heavy Ion Accelerator Facility), has been approved in China. It is designed to provide intense primary and radioactive ion beams for research in high energy density physics, nuclear physics, atomic physics as well as other applications. In order to achieve a high intensity of up to 5e11 ppp 238U34+, the Compression Ring (CRing) needs to stack more than 5 bunches transferred from the Booster Ring (BRing). However, the normal bucket to bucket injection scheme can only achieve an intensity gain of 2, so an injection method, fixed barrier bucket (BB) supported by electron cooling, is proposed. To suppress the severe space charge effect during the stacking process, off-alignment is adopted in the cooler to control the transverse emittance. In this paper, simulation and optimization with the BETACOOL program are presented.