A buffer-gas trap for the NEPOMUC positron beam: optimization studies with electrons

Deller, A.; Rogge, C. W.; Desopo, S.; Stenson, E. V.; Danielson, J. R.; Stoneking, M. R.; Hugenschmidt, C.; Sunn Pedersen, T.; Surko, C. M.

doi:10.1017/S0022377823001241

Title: A buffer-gas trap for the NEPOMUC positron beam: optimization studies with electrons

Journal Article · 20 December 2023 · Journal of Plasma Physics

DOI: https://doi.org/10.1017/S0022377823001241 · OSTI ID:2248130

; Rogge, C. W.; Desopo, S.;

;

Buffer-gas traps (BGTs) use inelastic interactions with nitrogen molecules to capture positrons from a continuous beam. These devices are invaluable for high-resolution studies of matter–antimatter interactions, antihydrogen research and positronium laser spectroscopy. We present a new project with the goal of producing a non-neutral plasma containing $${\sim }10^8$$ low-energy positrons by installing a BGT on the NEPOMUC (NEutron induced POsitron source MUniCh) high-intensity positron beam. Details of the BGT are outlined and results are presented from experiments in which an electron beam, with a similar intensity and energy spread to the remoderated NEPOMUC beam, was used to create pulses of non-neutral electron plasma. The device is a vital component of the APEX (A Positron Electron eXperiment) project, which aims to create a low-temperature electron–positron pair plasma.

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Research Organization:: Univ. of California, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0019271

OSTI ID:: 2248130

Journal Information:: Journal of Plasma Physics, Journal Name: Journal of Plasma Physics Journal Issue: 6 Vol. 89; ISSN 0022-3778

Publisher:: Cambridge University Press (CUP)Copyright Statement

Country of Publication:: United Kingdom

Language:: English

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