crossed electric and magnetic fields

in mass spectrometry
https://doi.org/10.1351/goldbook.C01405
Electric and magnetic fields with the electric field direction at right angles to the magnetic field direction.
Source:
PAC, 1991, 63, 1541. (Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)) on page 1544 [Terms] [Paper]