The signal-to-noise ratio of measurements by electron holography could be considerably improved if longer exposure times were possible. However exposure times were limited to a few seconds by instabilities in experimental conditions during acquisition. We show that by implementing advanced automation, routine exposure times of several tens of mins can be obtained without the need for image stacks.
This work was supported by the French National Research Agency under the project IODA (ANR-17-CE24-0, the "Investissement d'Avenir" program reference No. ANR-10-EQPX-38-01 and No. 11-IDEX-0002, the "Conseil Regional Midi-Pyrénées", the European FEDER for financial support within the CPER program. This work was also supported by the international associated laboratory M²OZART.
Unlimited acquisition time in electron holography by automated feedback control of transmission electron microscope
C. Gatel, J. Dupuy, F. Houdellier and M.J. Hÿtch
Applied Physic Letters 113, 133102 (2018);