Zobrazeno 1 - 10
of 2 109
pro vyhledávání: '"HAGEN, C."'
Autor:
Chan, H. W., Prodanović, V., Theulings, A. M. M. G., Tao, S., Smedley, J., Hagen, C. W., Sarro, P. M., Graaf, H. v. d.
Publikováno v:
JINST 18 P06028 (2023)
In this work we demonstrate that ultra-thin (5 and 15 nm) MgO transmission dynodes (tynodes) with sufficient high transmission electron yield (TEY) can be constructed. These tynodes act as electron amplification stages in a novel vacuum electron mult
Externí odkaz:
http://arxiv.org/abs/2304.09615
Autor:
Lioliou, G., Morgó, O. Roche i, Marathe, S., Wanelik, K., Cipiccia, S., Olivo, A., Hagen, C. K.
We present a flyscan compatible acquisition scheme for three-modal X-Ray Computed Tomography (CT) with two-dimensional phase sensitivity. Our approach is demonstrated using a "beam tracking" setup, through which a sample's attenuation, phase (refract
Externí odkaz:
http://arxiv.org/abs/2208.12076
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 doping level of silicon doping and the effect of the distribution of the dopi
Externí odkaz:
http://arxiv.org/abs/2110.12965
Publikováno v:
J. Instrum. 15, P10022 (2020)
We measure the transmission secondary electron yield of nanometer-thick Al$_2$O$_3$/TiN/Al$_2$O$_3$ 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 a
Externí odkaz:
http://arxiv.org/abs/2010.12462
Autor:
Chan, H. W., Prodanović, V., Theulings, A. M. M. G., Bruggencate, T. ten, Hagen, C. W., Sarro, P. M., van der Graaf, H.
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
Externí odkaz:
http://arxiv.org/abs/2008.09054
Autor:
Chan, H. W., Prodanović, V., Theulings, A. M. M. G., Hagen, C. W., Sarro, P. M., Graaf, H. v. d
The (secondary) electron emission from multilayered Al$_2$O$_3$/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
Externí odkaz:
http://arxiv.org/abs/2008.08997
Akademický článek
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Autor:
Kallon, G. K., Vittoria, F. A., Endrizzi, M., Diemoz, P. C., Hagen, C. K., Zamir, A., Basta, D., Olivo, A.
Edge illumination (EI) is a non-interferometric X-ray phase contrast imaging (XPCI) method that has been successfully implemented with conventional polychromatic sources, thanks to its relaxed coherence requirements. Like other XPCI methods, EI enabl
Externí odkaz:
http://arxiv.org/abs/1709.09005
Autor:
Hagen, C. R.
The isotropic harmonic oscillator in N dimensions is shown to have an underlying symmetry group O(2,1)X O(N)which implies a unique result for the energy spectrum of the system. Raising and lowering operators analogous to those of the one-dimensional
Externí odkaz:
http://arxiv.org/abs/1702.07659