HAL : in2p3-00749861, version 1

DOI : 10.1016/j.ijms.2012.06.008

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International Journal of Mass Spectrometry 325 (2012) 51-57

Buffer-gas-free mass-selective ion centering in Penning traps by simultaneous dipolar excitation of magnetron motion and quadrupolar excitation for interconversion between magnetron and cyclotron motion

M. Rosenbusch, K. Blaum, C. Borgmann, S. Kreim, M. Kretzschmar, D. Lunney1, L. Schweikhard, F. Wienholtz, R. N. Wolf

(2012)

A new excitation scheme of the radial ion-motional modes is introduced for Penning-trap ion-cyclotron-resonance experiments. By simultaneous dipolar excitation of the magnetron motion and resonant quadrupolar excitation for the conversion between magnetron motion and cyclotron motion, a mass-selective recentering of the ions of interest is performed while all other (contaminant) ions are ejected from the trap. This new technique does not rely on the application of a buffer gas as presently used [G. Savard, St. Becker, G. Bollen, H.-J. Kluge, R.B. Moore, Th. Otto, L Schweikhard, H. Stolzenberg, U. Wiess, Physics Letters A 158 (1991) 247] and will thus prevent charge-exchange reactions and damping of the motion that decreases mass resolving power. (C) 2012 Elsevier B.V. All rights reserved.

1 :	CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse

équipe(s) de recherche : CSNSM SNO

Thème(s)

:

Physique/Physique Nucléaire Expérimentale

Mot(s)-clé(s) : OCTUPOLAR EXCITATION – RAMSEY METHOD – SPECTROMETRY – RESONANCE – ACCURACY – ISOLTRAP – AXIALIZATION – CAPTURE – NUCLEI – MODES

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Soumis le : Jeudi 8 Novembre 2012, 15:00:08

Dernière modification le : Vendredi 9 Novembre 2012, 09:37:16