Open AccessA Low Energy H- Beamline for the ALPHA Antihydrogen Experiment
Author(s) -
W. Bertsche,
Dan Faircloth,
M. A. Johnson,
Taneli Kalvas,
Scott Lawrie,
O. Tarvainen
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2244/1/012080
Subject(s) - antihydrogen , beamline , physics , atomic physics , nuclear physics , ion , ion source , alpha particle , ion trap , quadrupole , plasma , optics , beam (structure) , antimatter , lepton , electron , quantum mechanics
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 μ A. 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.