- document
-
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
- document
-
Theulings, A.M.M.G. (author), Tao, S. X. (author), Hagen, C.W. (author), van der Graaf, H. (author)The effect of doping in Si3N4 membranes on the secondary electron yield is investigated using Monte Carlo simulations of the electron-matter interactions. The effect of the concentration and the distribution of the doping in silicon rich silicon nitride membranes is studied by using the energy loss function as obtained from ab initio density...journal article 2022
- document
-
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
- document
-
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
- document
-
Duarte Pinto, S.C. (author), Ortega, R (author), Ritzau, S. (author), Pasquale, D (author), Laprade, B. (author), Mrotek, S. (author), Gardell, S. (author), Zhou, Z. (author), Plomp, J. (author), van Eijck, L. (author), Bilheux, H. (author), Dhiman, I. (author)A neutron imaging detector based on neutron-sensitive microchannel plates (mcps) was constructed and tested at beamlines of thermal and cold neutrons. The mcps are made of a glass mixture containing 10B and natural Gd, which makes the bulk of the mcp an efficient neutron converter. Contrary to the neutron-sensitive scintillator screens normally...conference paper 2017