Source of pure proton beams

TL;DR

This paper presents a high-current ion source that uses millimeter-wave radiation under ECR conditions to produce pure proton beams with minimal impurities, demonstrated through experiments achieving 50 mA proton current and 99.9% atomic ion purity.

Contribution

It introduces a novel high-power millimeter-wave ion source capable of generating highly pure proton beams with high current, advancing ion source technology.

Findings

Achieved 50 mA proton beam current.

Produced proton beams with 99.9% atomic ion content.

Demonstrated high volumetric energy input up to 250 W/cm^3.

Abstract

In the quasi-gasdynamic high-current ion source described in this work, the plasma is sustained by high-power millimeter-wave radiation under the electron cyclotron resonance (ECR) condition. In such facilities, it is possible to achieve high volumetric energy input of up to $250$ $W/cm^3$ and obtain pure proton beams with a minimum amount of impurities and molecular ions. Experiments conducted on the GISMO facility demonstrated the possibility of a proton beam formation with a current of $50$ mA and an extremely high ($99.9$\%) content of atomic ions.