magnetic deflection

in mass spectrometry
https://doi.org/10.1351/goldbook.M03680
The deflection of an ion beam as a result of the motion of the ions in a magnetic field (magnetic sector). Generally the direction of motion of the ions is at right angles to the direction of the magnetic field, and the motion is uniform.
Sources:
Orange Book, 2nd ed., p. 201 [Terms]
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]