Fanghaenel, Sven, Asvany, Oskar and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2017). Optimization of RF multipole ion trap geometries. J. Mol. Spectrosc., 332. S. 124 - 134. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-083X

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Abstract

Radio-frequency (rf) traps are ideal places to store cold ions for spectroscopic experiments. Specific multipole configurations are suited best for different applications but have to be modified to allow e.g. for a proper overlap of a laser beam waist with the ion cloud. Therefore the corresponding trapping fields should be shaped accordingly. To achieve this goal highly accurate electrical potentials of rf multipole traps and the resulting effective trapping potentials are calculated using the boundary element method (BEM). These calculations are used to evaluate imperfections and to optimize the field geometry. For that purpose the complex fields are reduced to a small set of multipole expansion coefficients. Desirable values for these coefficients are met by systematic changes of real trap dimensions from CAD designs. The effect of misalignment of a linear quadrupole, the optimization of an optically open Paul trap, the influence of steering electrodes (end electrode and ring electrode) on a 22-pole ion trap and the effect of the micro motion on the lowest reachable temperatures in such a trap are discussed. (C) 2016 Elsevier Inc. All rights reserved.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Fanghaenel, SvenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Asvany, OskarUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schlemmer, StephanUNSPECIFIEDorcid.org/0000-0002-1421-7281UNSPECIFIED
URN: urn:nbn:de:hbz:38-241751
DOI: 10.1016/j.jms.2016.12.003
Journal or Publication Title: J. Mol. Spectrosc.
Volume: 332
Page Range: S. 124 - 134
Date: 2017
Publisher: ACADEMIC PRESS INC ELSEVIER SCIENCE
Place of Publication: SAN DIEGO
ISSN: 1096-083X
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
INFRARED-SPECTROSCOPY; ELECTRONIC-SPECTRA; TEMPERATURE; COLD; QUADRUPOLE; CONFIRMATION; COLLISIONS; COMPLEXES; H-2Multiple languages
Physics, Atomic, Molecular & Chemical; SpectroscopyMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/24175

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