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Space-charge effects in Penning ion traps

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    0443892 - ÚJF 2016 RIV NL eng J - Journal Article
    Porobic, T. - Beck, M. - Breitenfeldt, M. - Couratin, C. - Finlay, P. - Knecht, A. - Fabian, X. - Friedag, P. - Flechard, X. - Lienard, E. - Ban, G. - Zákoucký, Dalibor - Soti, G. - Van Gorp, S. - Weinheimer, C. - Wursten, E. - Severijns, N.
    Space-charge effects in Penning ion traps.
    Nuclear Instruments & Methods in Physics Research Section A. Roč. 785, JUN (2015), s. 153-162. ISSN 0168-9002
    R&D Projects: GA MŠk LA08015; GA MŠk(CZ) LG13031
    Institutional support: RVO:61389005
    Keywords : Penning trap * space-charge * magnetron motion * ion trapping * buffer gas cooling * ion cyclotron resonance
    Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
    Impact factor: 1.200, year: 2015

    The influence of space-charge on ion cyclotron resonances and magnetron eigenfrequency in a gas-filled Penning ion trap has been investigated. Off-line measurements with K-39(+) using the cooling trap of the WITCH retardation spectrometer-based setup at ISOLDE/CERN were performed. Experimental ion cyclotron resonances were compared with ab initio Coulomb simulations and found to be in agreement. As an important systematic effect of the WITCH experiment, the magnetron eigenfrequency of the ion cloud was studied under increasing space-charge conditions. Finally, the helium buffer gas pressure in the Penning trap was determined by comparing experimental cooling rates with simulations.
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