Siegel der Universität

Universität zu Köln
line
Mathematisch-Naturwissenschaftliche Fakultät
Fachgruppe Physik

I. Physikalisches Institut

Methods

Printer-friendly versionPDF version


Boundary Element Method (BEM)

Description

To find the electric potential of an rf multipole trap we have to find a solution for the ''Laplace'' equation:

ΔΦ=0

The movement of a particle in a rapidly oscillating field can described by an effective trapping potential. It is calculated by taking the time-average over one period of the fast oscillation rf field .

This effective potential can be expressed as:

Ueffective = qΦdc+ q²⁄(4mΩ²)·(∇Φrf

with Φdc the static part of the potential, Φrf the rf part, Ω the rf frequenz and m the mass of the particle. ...more

Figure(s)

Instruments

Related projects

Acknowledgments