Positron accumulation in the GBAR experiment

Blumer P, Charlton M, Chung M, Clade P, Comini P, Crivelli P, Dalkarov O, Debu P, Dodd L, Douillet A, Guellati S, Hervieux PA, Hilico L, Husson A, Indelicato P, Janka G, Jonsell S, Karr JP, Kim BH, Kim ES, Kim SK, Ko YJ, Kosinski T, Kuroda N, Latacz BM, Lee B, Lee H, Lee J, Leite AMM, Leveque K, Lim E, Liszkay L, Lotrus P, Lunney D, Manfredi G, Mansoulie B, Matusiak M, Mornacchi G, Nesvizhevsky , Nez F, Niang S, Nishi R, Ohayon B, Park K, Paul N, Perez P, Procureur S, Radics B, Regenfus C, Reymond JM, Reynaud S, Rousse JY, Rousselle O, Rubbia A, Rzadkiewicz J, Sacquin Y, Schmidt-Kaler F, Staszczak M, Szymczyk K, Tanaka T, Tuchming B, Vallage B, Voronin A, Van Der Werf DP, Wolf S, Won D, Wronka S, Yamazaki Y, Yoo KH, Yzombard P, Baker CJ (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Book Volume: 1040

Article Number: 167263

DOI: 10.1016/j.nima.2022.167263

Abstract

We present a description of the GBAR positron (e⁺) trapping apparatus, which consists of a three stage Buffer Gas Trap (BGT) followed by a High Field Penning Trap (HFT), and discuss its performance. The overall goal of the GBAR experiment is to measure the acceleration of the neutral antihydrogen (H¯) atom in the terrestrial gravitational field by neutralising a positive antihydrogen ion (H¯⁺), which has been cooled to a low temperature, and observing the subsequent H¯ annihilation following free fall. To produce one H¯⁺ ion, about 10¹⁰ positrons, efficiently converted into positronium (Ps), together with about 10⁷ antiprotons (p¯), are required. The positrons, produced from an electron linac-based system, are accumulated first in the BGT whereafter they are stacked in the ultra-high vacuum HFT, where we have been able to trap 1.4(2) × 10⁹ positrons in 1100 s.

Involved external institutions

Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich Switzerland (CH) Swansea University United Kingdom (GB) Ulsan National Institute of Science and Technology (UNIST) / 울산과학기술원 Korea, Republic of (KR) École Polytechnique - Université Paris-Saclay France (FR) University of Paris 4 - Paris-Sorbonne / Université paris IV Paris-Sorbonne France (FR) Institute of Physics and Chemistry of Materials of Strasbourg (IPCMS) / Institut de physique et de chimie des Matériaux de Strasbourg (IPCMS) France (FR) Stockholm University / Stockholms universitet Sweden (SE) Seoul National University (SNU) / 서울대학교 Korea, Republic of (KR) Institute for Basic Science Korea, Republic of (KR) Narodowe Centrum Badań Jądrowych Poland (PL) Korea University Korea, Republic of (KR) University of Tokyo Japan (JP) Europäische Organisation für Kernforschung (CERN) Switzerland (CH) Institute Laue-Langevin (ILL) France (FR) Johannes Gutenberg-Universität Mainz (JGU) Germany (DE) Riken Institute of Physical and Chemical Research / 理研 Japan (JP)

How to cite

APA:

Blumer, P., Charlton, M., Chung, M., Clade, P., Comini, P., Crivelli, P.,... Baker, C.J. (2022). Positron accumulation in the GBAR experiment. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1040. https://dx.doi.org/10.1016/j.nima.2022.167263

MLA:

Blumer, Philipp, et al. "Positron accumulation in the GBAR experiment." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1040 (2022).

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