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Chan, H.W. (author), Prodanovic, V. (author), Theulings, A.M.M.G. (author), Tao, S. (author), Smedley, J. (author), Hagen, C.W. (author), Sarro, Pasqualina M (author), v.d. Graaf, H. (author)In this work we demonstrate that ultra-thin (5 and 15 nm) MgO transmission dynodes with sufficient high transmission electron yield (TEY) can be constructed. These transmission dynodes act as electron amplification stages in a novel vacuum electron multiplier: the Timed Photon Counter. The ultra-thin membranes with a diameter of 30 μm are...journal article 2023
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Chan, H.W. (author), Prodanovic, V. (author), Theulings, A.M.M.G. (author), ten Bruggencate, T. (author), Hagen, C.W. (author), Sarro, Pasqualina M (author), van der Graaf, H. (author)Large-area transmission dynodes were fabricated by depositing an ultra-thin continuous film on a silicon wafer with a 3-dimensional pattern. After removing the silicon, a corrugated membrane with enhanced mechanical properties was formed. Mechanical metamaterials, such as this corrugated membrane, are engineered to improve its strength and...journal article 2022
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Chan, H.W. (author), Prodanovic, V. (author), Theulings, A.M.M.G. (author), Hagen, C.W. (author), Sarro, Pasqualina M (author), v.d. Graaf, H. (author)The (secondary) electron emission from multilayered Al2O3/TiN membranes has been investigated with a hemispherical collector system in a scanning electron microscope for electrons with energies between 0.3 and 10 keV. These ultra-thin membranes are designed to function as transmission dynodes in novel vacuum electron multipliers. Two...journal article 2021
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van der Reep, T.H.A. (author), Looman, B.A. (author), Chan, H.W. (author), Hagen, C.W. (author), van der Graaf, H. (author)We measure the transmission secondary electron yield of nanometer-thick Al2O3/TiN/Al2O3 films using a prototype version of a Timed Photon Counter (TiPC). We discuss the method to measure the yield extensively. The yield is then measured as a function of landing energy between 1.2 and 1.8 keV and found to be in the range of 0.1 (1.2 keV) to 0.9 ...journal article 2020