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Updated: May 28, 2026

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
Published on: August 17, 2017
Twin-electron biprism
M Ikeda1, A Sugawara, K Harada
1Central Research Laboratory, Hitachi Ltd, Akanuma, Hatoyama, Hiki, Saitama 350-0395, Japan. masaki.ikeda.jf@hitachi.com
Abstract:
In order to obtain a large deflection angle without increasing the applied voltage to an electron biprism, we have developed a 'twin-electron biprism' (TBP), which is composed of two filament electrodes and a pair of ground plates. The observed interference-fringe spacing revealed that the deflection angle created by a TBP was about twice larger than that by a 'conventional electron biprism'. Also, we have suggested, in a double-electron biprism interferometry, the optimal disposition of a TBP for reducing the intensity of Fresnel fringes recorded in an electron hologram.
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