A4 Article in conference proceedings
A Low Energy H- Beamline for the ALPHA Antihydrogen Experiment (2022)

Bertsche, W. A., Faircloth, D., Johnson, M. A., Kalvas, T., Lawrie, S., & Tarvainen, O. (2022). A Low Energy H- Beamline for the ALPHA Antihydrogen Experiment. In ICIS2021 : 19th International Conference on Ion Sources (2244, Article 012080). IOP Publishing. Journal of Physics : Conference Series. https://doi.org/10.1088/1742-6596/2244/1/012080

JYU authors or editors

Publication details

All authors or editors: Bertsche, W. A.; Faircloth, D.; Johnson, M. A.; Kalvas, T.; Lawrie, S.; Tarvainen, O.

Parent publication: ICIS2021 : 19th International Conference on Ion Sources

Conference:

Place and date of conference: Online, 20.-24.9.2021

Journal or series: Journal of Physics : Conference Series

ISSN: 1742-6588

eISSN: 1742-6596

Publication year: 2022

Publication date: 01/04/2022

Volume: 2244

Article number: 012080

Publisher: IOP Publishing

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1088/1742-6596/2244/1/012080

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/82646

Abstract

The CERN ALPHA experiment makes precision measurements of antihydrogen atoms, confined in a superconducting magnetic minimum trap. Recent measurements of the antihydrogen spectrum have already provided high-resolution tests of fundamental symmetries, and ALPHA has now embarked on an ambitious upgrade programme aimed at directly comparing hydrogen and antihydrogen within their existing atom trap. One aspect of this upgrade will be the development of a low-energy (50 eV) hydrogen ion source that is compatible with ALPHA's existing magnetic charged particle beamlines. PELLIS, previously developed at JYFL, is a 5 keV filament-driven source that generates H- beams with low emittances and currents of up to 50 μA. Here, we explore the feasibility of a proposed electrostatic beamline design to transport H- ions from a PELLIS-type ion source into ALPHA's various particle traps. We present SIMION simulations that were used to develop the beamline, focusing on components such as a quadrupole switchyard and drift tube deceleration stage.

Keywords: plasma physics; research equipment; antimatter

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2022

JUFO rating: 1