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Article Dans Une Revue Nucl.Instrum.Meth.A Année : 2022

Positron accumulation in the GBAR experiment

M. Charlton
  • Fonction : Auteur
P. Clade
O. Dalkarov
  • Fonction : Auteur
L. Dodd
  • Fonction : Auteur
P. Indelicato
S. Jonsell
  • Fonction : Auteur
E. Lim
  • Fonction : Auteur
F. Nez
R. Nishi
  • Fonction : Auteur
N. Paul
  • Fonction : Auteur
  • PersonId : 1198321
  • IdHAL : nancy-paul
S. Reynaud
T. Tanaka
A. Voronin
  • Fonction : Auteur
P. Yzombard
C.J. Baker
  • Fonction : Auteur

Résumé

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.

Dates et versions

hal-03677985 , version 1 (25-05-2022)

Identifiants

Citer

P. Blumer, M. Charlton, M. Chung, P. Clade, P. Comini, et al.. Positron accumulation in the GBAR experiment. Nucl.Instrum.Meth.A, 2022, 1040, pp.167263. ⟨10.1016/j.nima.2022.167263⟩. ⟨hal-03677985⟩
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