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RESEARCH PRODUCT
Individual and center-of-mass resonances in the motional spectrum of an electron cloud in a Penning trap
Debasish BiswasT. ValenzuelaP. PaascheGünter WerthC. Angelescusubject
PhysicsOscillationExcited stateResonanceIon trapElectronAtomic physicsIon cyclotron resonance spectrometryPenning trapAtomic and Molecular Physics and OpticsExcitationdescription
We have examined experimentally the motional spectrum of an electron cloud confined in a Penning trap. When the axial oscillation is excited by a radio frequency field the resonance exhibits a double structure. Both components depend differently on the number of trapped electrons and have different shape and width. We conclude that one of them corresponds to the excitation of the individual electrons while the other is the center-of-mass mode of the cloud. The threshold behaviour of the center-of-mass resonance suggests that it is a parametric instability of a Mathieu type equation of motion.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-03-01 | The European Physical Journal D - Atomic, Molecular and Optical Physics |