Abstract
Electron interferometers are very sensitive to mechanical vibration and alternating magnetic fields. This is the reason why in the past their application was restricted to laboratories with very low disturbances of this kind. We present a novel type of electron biprism interferometer totally different in its technical realisation compared to conventional instruments. Its extremely low sensitivity to both types of disturbances is demonstrated and for the first time allows to make use of electron interferometry in virtually every environment. Experiments inconceivable with conventional electron interferometers are rendered possible with the new instrument. As an example, we hope to be able to demonstrate with it the rotational phase shift of charged matter waves (Sagnac effect with electrons) in the near future.
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