Mattauch–Herzog geometry
An arrangement for a double-focusing @M03731@ in which a deflection of \(\frac{\pi}{4\ \sqrt{2}}\) radians in a radial electrostatic field is followed by a magnetic deflection of \(\frac{\pi}{2}\) radians.
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 1546 [Terms] [Paper]