Düsseldorf 2007 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 5: Ionenfallen und Cluster
MS 5.1: Talk
Wednesday, March 21, 2007, 11:30–11:45, 5F
Simultaneous Monitoring of the Radial Modes of the Ion Motion and their Manipulation in Penning traps by FT-ICR MS — •Martin Breitenfeldt1, Falk Ziegler1, Alexander Herlert2, Gerrit Marx1, and Lutz Schweikhard1 — 1Institut für Physik, Ernst-Moritz-Arndt-Universität, Domstr. 10a, D-17487 Greifswald — 2Physics Department, CERN, CH-1211 Geneva 23
It is demonstrated how FT-ICR MS can be used to monitor both the coherent magnetron motion and the cyclotron motion of ions stored in a Penning trap. By repeated measurements of the ICR signal intensity at the magnetron frequency, ν−, and the reduced cyclotron frequency, ν+, the manipulation of the ion motion by dipolar, quadrupolar, and octupolar excitation has been followed. In particular, the conversion between the magnetron and the cyclotron motion by quadrupolar and octupolar excitation at the corresponding resonance frequencies νc = ν+ + ν− and 2νc, respectively, after a preceding dipolar excitation of the magnetron motion, has been observed by detection of both the magnetron and the cyclotron signal. In the case of octupolar excitation this is the first experiment where the resonance is monitored via a signal directly related to the magnetron motion. Moreover, it is demonstrated that FT-ICR MS allows the simultaneous monitoring of the excitation effect on both the cyclotron and the magnetron motion.