image current detection

https://doi.org/10.1351/goldbook.12430
Method of ion detection by measuring the current that results from the image charge induced by a coherent motion of ions passing near a conductor.
Note: In Fourier transform mass spectrometers or Kingdon traps, the coherent orbital motion of ions between a pair of electrodes induces a radio frequency image charge in the electrodes and an alternating image current in the detection circuit connecting to the electrodes.
Source:
PAC, 2013, 85, 1515. (Definitions of terms relating to mass spectrometry (IUPAC Recommendations 2013)) on page 1548 [Terms] [Paper]