Positron accumulation in the GBAR experiment

Blumer, P.; Charlton, Michael; Chung, M.; Cladé, P.; Comini, P.; Crivelli, P.; Dalkarov, O.; Debu, P.; Dodd, Liam; Douillet, A.; Guellati, S.; Hervieux, P.-A.; Hilico, L.; Husson, A.; Indelicato, P.; Janka, G.; Jonsell, S.; Karr, J.-P.; Kim, B.H.; Kim, E.S.; Kim, S.K.; Ko, Y.; Kosinski, T.; Kuroda, N.; Latacz, B.M.; Lee, B.; Lee, H.; Lee, J.; Leite, A.M.M.; Lévêque, K.; Lim, E.; Liszkay, L.; Lotrus, P.; Lunney, D.; Manfredi, G.; Mansoulié, B.; Matusiak, M.; Mornacchi, G.; Nesvizhevsky, V.; Nez, F.; Niang, S.; Nishi, R.; Ohayon, B.; Park, K.; Paul, N.; Pérez, P.; Procureur, S.; Radics, B.; Regenfus, C.; Reymond, J.-M.; Reynaud, S.; Roussé, J.-Y.; Rousselle, O.; Rubbia, A.; Rzadkiewicz, J.; Sacquin, Y.; Schmidt-Kaler, F.; Staszczak, M.; Szymczyk, K.; Tanaka, T.; Tuchming, B.; Vallage, B.; Voronin, A.; der, Dirk van; Wolf, S.; Won, D.; Wronka, S.; Yamazaki, Y.; Yoo, K.H.; Yzombard, P.; Baker, Christopher

doi:10.1016/j.nima.2022.167263

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Positron accumulation in the GBAR experiment

P. Blumer

, Michael Charlton, M. Chung

, P. Cladé, P. Comini

, P. Crivelli, O. Dalkarov, P. Debu, Liam Dodd, A. Douillet, S. Guellati, P.-A. Hervieux

, L. Hilico

, A. Husson

, P. Indelicato, G. Janka

, S. Jonsell

, J.-P. Karr

, B.H. Kim, E.S. Kim, S.K. Kim, Y. Ko

, T. Kosinski, N. Kuroda

, B.M. Latacz

, B. Lee, H. Lee, J. Lee, A.M.M. Leite

, K. Lévêque, E. Lim, L. Liszkay, P. Lotrus, D. Lunney

, G. Manfredi, B. Mansoulié

, M. Matusiak

, G. Mornacchi, V. Nesvizhevsky

, F. Nez

, S. Niang, R. Nishi

, B. Ohayon

, K. Park, N. Paul

, P. Pérez

, S. Procureur

, B. Radics

, C. Regenfus

, J.-M. Reymond, S. Reynaud

, J.-Y. Roussé, O. Rousselle, A. Rubbia, J. Rzadkiewicz, Y. Sacquin, F. Schmidt-Kaler

, M. Staszczak, K. Szymczyk

, T. Tanaka, B. Tuchming

, B. Vallage

, A. Voronin, Dirk van der Werf

, S. Wolf

, D. Won, S. Wronka

, Y. Yamazaki

, K.H. Yoo, P. Yzombard

, Christopher Baker

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume: 1040, Start page: 167263

Swansea University Authors: Michael Charlton, Liam Dodd, Dirk van der Werf , Christopher Baker

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DOI (Published version): 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...

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Published in:	Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
ISSN:	0168-9002
Published:	Elsevier BV 2022
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa60681
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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 annihilation following free fall. To produce one ion H+, about 1010 positrons, efficiently converted into positronium (Ps), together with about 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) x 109 positrons in 1100 s.
Item Description:	Data will be made available on request.
Keywords:	Positron, Accumulator, Antimatter, Antihydrogen, Gravitation
College:	Faculty of Science and Engineering
Funders:	We acknowledge support of the Agence Nationale de la Recherche, France (project ANTION ANR-14-CE33-0008), CNES, France (convention number 5100017115), the Swiss National Science Foundation, Switzerland (Grant number 173597), ETH Zurich, Switzerland (Grant number ETH-46 17-1), the Swedish Research Council (VR 2021-04005), the Ministry of Education of the Republic of Korea and the National Research Foundation of Korea (NRF-2016R1A6 A3A11932936, NRF-2021R1A2C3-010989). Laboratoire Kastler Brossel (LKB) is a Unité Mixte de Recherche de Sorbonne Université, de ENS-PSL Research University, du Collège de France et du CNRS, France no 8552. We thank CERN for the support to construct the linac and its biological shield and for fellowships and Scientific Associateship provided to D.P. van der Werf and P. Pérez. The support of the Enhanced Eurotalents Fellowship programme to D.P. van der Werf is acknowledged . We also thank CUP(IBS) for the fellowship of B.H. Kim (grant number IBS-R016-Y1). S. Niang acknowledges support from the Laboratoire dExcellence P2IO (ANR-10-LABX-0038) in the framework Investissements dAvenir (ANR-11-IDEX-0003-01). We gratefully acknowledge the help of François Butin and the CERN management and teams that were involved in this project, and are indebted to the technical support provided by Julian Kivell and Phil Hopkins from Swansea University and by Didier Pierrepont from CEA-Saclay.
Start Page:	167263

Positron accumulation in the GBAR experiment

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