Record accumulation of antiprotons in a Penning-Malmberg Trap and their preparation for improved production of antihydrogen beams

@article{lee2026record,
  title = {{Record accumulation of antiprotons in a Penning-Malmberg Trap and their preparation for improved production of antihydrogen beams}},
  author = {B Lee and B Kim and P Adrich and I Belosevic and M Chung and P Comini and P Crivelli and P Debu and S Geffroy and P Guichard and P.A. Hervieux and L Hilico and P Indelicato and S Jonsell and S Kim and E.S Kim and N Kuroda and L Liszkay and D Lunney and G Manfredi and B Mansoulié and M Matusiak and V Nesvizhevsky and François Nez and K Park and E Pérez and P Pérez and C Regenfus and C Roumegou and J.Y Roussé and F. Schmidt Kaler and K Szymczyk and T.A Tanaka and B Tuchming and D.P van der Werf and D Won and S Wronka and P Yzombard},
  journal = {Journal of Physics G: Nuclear and Particle Physics},
  year = {2026},
  month = oct,
  doi = {10.1088/1361-6471/ae7456},
  eprint = {2603.21168},
  archivePrefix = {arXiv},
  url = {https://hal.science/hal-05568908v1},
  note = {CC BY 4.0},
}

TY  - JOUR
TI  - Record accumulation of antiprotons in a Penning-Malmberg Trap and their preparation for improved production of antihydrogen beams
AU  - B Lee
AU  - B Kim
AU  - P Adrich
AU  - I Belosevic
AU  - M Chung
AU  - P Comini
AU  - P Crivelli
AU  - P Debu
AU  - S Geffroy
AU  - P Guichard
AU  - P.A. Hervieux
AU  - L Hilico
AU  - P Indelicato
AU  - S Jonsell
AU  - S Kim
AU  - E.S Kim
AU  - N Kuroda
AU  - L Liszkay
AU  - D Lunney
AU  - G Manfredi
AU  - B Mansoulié
AU  - M Matusiak
AU  - V Nesvizhevsky
AU  - François Nez
AU  - K Park
AU  - E Pérez
AU  - P Pérez
AU  - C Regenfus
AU  - C Roumegou
AU  - J.Y Roussé
AU  - F. Schmidt Kaler
AU  - K Szymczyk
AU  - T.A Tanaka
AU  - B Tuchming
AU  - D.P van der Werf
AU  - D Won
AU  - S Wronka
AU  - P Yzombard
PY  - 2026
DA  - 2026/10/21
JO  - Journal of Physics G: Nuclear and Particle Physics
DO  - 10.1088/1361-6471/ae7456
UR  - https://hal.science/hal-05568908v1
AB  - CERN's AD/ELENA ``antimatter factory'' - unique worldwide - serves several experiments, all of which use electromagnetic traps to accumulate antiprotons for fundamental science. The GBAR experiment employs a charge-exchange reaction between an antiproton beam and a positronium cloud to produce antihydrogen for gravitational studies. GBAR has also pioneered an electrostatic scheme using a pulsed drift tube to decelerate the 100 keV antiproton beam, rather than slowing the antiprotons in a foil, as is commonly done in other experiments. Following first results producing a 6 keV antihydrogen beam directly after the decelerator, a trap has now been installed to increase the production rate. The emittance growth resulting from the deceleration is reduced in the trap by Coulomb interaction with a cold electron cloud. The antiproton cloud is further compressed using rotating wall cooling and can be re-accelerated up to energies of 10 keV, including a time focus. Here we describe the commissioning results, trapping 56(3)% of the ELENA beam, delivering 6.4(0.4) × 10^6 antiprotons per shot for improved production of antihydrogen, and a record accumulation of over 6.4(0.4) × 10^7 antiprotons in under 35 minutes.
SN  - 0954-3899
SN  - 1361-6471
ER  -