Experiments with low energy ion beam transport into toroidal magnetic fields

TL;DR

This paper reports on experiments with low energy ion beams transported into toroidal magnetic fields, demonstrating successful beam injection and diagnostics in a setup designed for plasma physics and nuclear astrophysics research.

Contribution

It presents new experimental results on ion beam transport and injection in toroidal magnetic fields, advancing the development of a low energy ion storage ring.

Findings

Successful beam transport in toroidal magnetic fields

Development of in situ ion beam diagnostics

Enhanced understanding of beam injection properties

Abstract

The stellarator-type storage ring for accumulation of multi- Ampere proton and ion beams with energies in the range of $100~AkeV$ to $1~AMeV$ is designed at Frankfurt university. The main idea for beam confinement with high transversal momentum acceptance was presented in EPAC2006. This ring is typically suited for experiments in plasma physics and nuclear astrophysics. The accumulator ring with a closed longitudinal magnetic field is foreseen with a strength up to $6-8~T$. The experiments with two room temperature 30 degree toroids are needed. The beam transport experiments in toroidal magnetic fields were first described in EPAC2008 within the framework of a proposed low energy ion storage ring. The test setup aims on developing a ring injection system with two beam lines representing the main beam line and the injection line. The primary beam line for the experiments was installed and successfully commissioned in 2009. A special diagnostics probe for \textit{"in situ"} ion beam detection was installed.This modular technique allows online diagnostics of the ion beam along the beam path. In this paper, we present new results on beam transport experiments and discuss transport and transverse beam injection properties of that system.