magnetron motion

https://doi.org/10.1351/goldbook.12474
Slow rotation of the center of cyclotron motion around the central axis of a Penning ion trap that results from a drift of the cyclotron centre along the electric equipotential lines perpendicular to the magnetic field direction.
Note: The characteristic frequency of this motion is called the magnetron frequency.
Source:
PAC, 2013, 85, 1515. (Definitions of terms relating to mass spectrometry (IUPAC Recommendations 2013)) on page 1562 [Terms] [Paper]