ALPHA Experiment

Observation of the effect of gravity on the motion of antimatter

Refereed Publication

27 Sep 2023

Einstein’s general theory of relativity (GR), from 19151, remains the most successful description of gravitation.

Published in

Nature, 621, (2023)

Author List

E.K. Anderson, C. J. Baker, W. Bertsche, N.M. Bhatt, G. Bonomi, A. Capra, I. Carli, C. L. Cesar, M. Charlton, A. Christensen, R. Collister, A. Cridland Mathad, D. Duque Quiceno, S. Eriksson, A. Evans, N. Evetts, S. Fabbri, J. Fajans, A. Ferwerda, T. Friesen, M. C. Fujiwara, D.R. Gill, L.M. Golino, M.B.Gomes Gonçalves, P. Grandemange, P. Granum, J. S. Hangst, M. E. Hayden, D. Hodgkinson, E.D. Hunter, C.A. Isaac, A.J.U. Jimenez, M. A. Johnson, J.M. Jones, S. A. Jones, S. Jonsell, A. Khramov, N. Madsen, L. Martin, N. Massacret, D. Maxwell, J. T. K. McKenna, S. Menary, T. Momose

On the formation of antihydrogen beams using travelling optical lattices

Refereed Publication

01 Jul 2021

The production of beams of antihydrogen atoms using the dipole force provided by a travelling optical lattice to accelerate a sample of the anti-atoms held in a magnetic gradient atom trap is investigated.

Published in

New Journal of Physics 23, 073003 (2021)

Niels Madsen and Mike Charlton

Design and performance of a novel low energy multispecies beamline for an antihydrogen experiment

Refereed Publication

01 Apr 2023

The ALPHA Collaboration, based at the CERN Antiproton Decelerator, has recently implemented a novel beamline for low energy (<100

Published in

Phys. Rev. Accel. Beams 26, 040101 (2023)

Baker, C. J. and Bertsche, W. and Capra, A. and Cesar, C. L. and Charlton, M. and Christensen, A. J. and Collister, R. and Cridland Mathad, A. and Eriksson, S. and Evans, A. and Evetts, N. and Fabbri, S. and Fajans, J. and Friesen, T. and Fujiwara, M. C. and Gill, D. R. and Grandemange, P. and Granum, P. and Hangst, J. S. and Hayden, M. E. and Hodgkinson, D. and Isaac, C. A. and Johnson, M. A. and Jones, J. M. and Jones, S. A. and Khramov, A. and Kurchaninov, L. and Madsen, N. and Maxwell, D. and McKenna, J. T. K. and Menary, S. and Momose, T. and Mullan, P. S. and Munich, J. J. and Olchanski

Levi Oliveira de Araujo Azevedo

Student

Thomas Robertson-Brown

Student

Measuring the Properties of Antihydrogen

Theses

20 Sep 2022

This thesis describes the latest results of the on-going efforts to measure the properties of antihydrogen within the ALPHA collaboration. More specifically, it covers the construction and commissioning of the ALPHA-g experiment [1], and the plans to measure how antimatter behaves in Earth’s gravitational field. A special emphasis is on the ALPHA-g magnet system used to confine and manipulate the antihydrogen atoms. Tests of methods for calculating magnetic fields relevant for simulations [2] are covered as well.

Published in

Aarhus University

Peter Granum