open access publication

Article, 2024

Measurements of Penning-Malmberg trap patch potentials and associated performance degradation

PHYSICAL REVIEW RESEARCH, Volume 6, 1, 10.1103/PhysRevResearch.6.L012008

Contributors

Baker, C. J. [1] Bertsche, W. [2] [3] Capra, A. [4] Cesar, C. L. [5] Charlton, M. [1] Christensen, A. (Corresponding author) [6] [7] Collister, R. [4] Mathad, A. Cridland [1] Eriksson, S. [1] Evans, Alexandria [4] Evetts, N. [4] Fajans, J. [6] [7] Friesen, T. [8] Fujiwara, M. C. [4] Gill, D. R. [4] Grandemange, P. [4] Granum, P. 0000-0002-2710-266X [9] Hangst, J. S. [9] Hayden, M. E. [10] Hodgkinson, D. [3] Hunter, E. D. [6] [7] Isaac, C. A. 0000-0002-7813-1903 [1] Johnson, M. A. 0000-0002-0654-2658 [3] Jones, J. [1] Jones, S. A. 0000-0001-8205-2186 [1] Jonsell, S. [11] Khramov, A. [4] Kurchaninov, L. [4] Landsberger, H. [6] [7] Madsen, Nicolas [1] Maxwell, D. 0000-0001-5178-9492 [1] McKenna, J. T. K. 0000-0002-7838-4230 [4] Menary, S. [12] Momose, T. [4] Mullan, P. S. [1] Munich, J. J. 0000-0001-7475-3070 [10] Olchanski, K. [4] Olin, A. [12] Peszka, J. [1] Powell, A. [1] [8] Pusa, P. [13] Rasmussen, C. O. 0000-0002-6029-1730 [14] Robicheaux, F. [15] [16] Sacramento, R. L. [5] Sameed, M. [1] Sarid, E. [17] Silveira, D. M. [5] So, C. 0000-0002-8224-4695 [8] Stutter, G. [9] Tharp, T. D. [18] Thompson, R. [8] Torkzaban, C. [6] [7] Werf, D. P. van der [1] Ward, E. [6] [7] Wurtele, J. S. 0000-0001-8401-0297 [6] [7]

Affiliations

  1. [1] Swansea Univ, Fac Sci & Engn, Dept Phys, Swansea SA2 8PP, Wales
    2. [NORA names: United Kingdom; Europe, Non-EU; OECD];
  2. [2] Scitech Daresbury, Cockcroft Inst, Warrington WA4 4AD, England
    3. [NORA names: United Kingdom; Europe, Non-EU; OECD];
  3. [3] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, England
    4. [NORA names: United Kingdom; Europe, Non-EU; OECD];
  4. [4] TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada
    5. [NORA names: Canada; America, North; OECD];
  5. [5] Univ Fed Rio De Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, Brazil
    6. [NORA names: Brazil; America, South];

Abstract

Antiprotons created by laser ionization of antihydrogen are observed to rapidly escape the ALPHA trap. Further, positron plasmas heat more quickly after the trap is illuminated by laser light for several hours. These phenomena can be caused by patch potentials-variations in the electrical potential along metal surfaces. A simple model of the effects of patch potentials explains the particle loss, and an experimental technique using trapped electrons is developed for measuring the electric field produced by the patch potentials. The model is validated by controlled experiments and simulations.

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