Christian Fella

Dr. Christian Fella


Research Focus & Metrics

Academic Career Length

9Years (2018-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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12 June 2021 in Crystals
Verified
Journal Article
Open access
PDF file
DMDominik Müller
Dominik Müller
JGJonas Graetz
Jonas Graetz
ABAndreas Balles
Andreas Balles
SSSimon Stier
Simon Stier
RHRandolf Hanke
Randolf Hanke
CFChristian Fella
Christian Fella
In a comprehensive study, we demonstrate the performance and typical application scenarios for laboratory-based nano-computed tomography in materials research on various samples. Specifically, we focus on a projection magnification system with a nano focus source. The imaging resolution is quantified with common 2D test structures and validated in 3D applications by means of the Fourier Shell Correlation. As representative application examples from nowadays material research, we show metallization processes in multilayer integrated circuits, aging in lithium battery electrodes, and volumetric of metallic sub-micrometer fillers of composites. Thus, the laboratory system provides the unique possibility to image non-destructively structures in the range of 170–190 nanometers, even for high-density materials.

10 August 2018 in Microscopy and Microanalysis
Verified
Journal Article
Closed access
PDF file
CFChristian Fella
Christian Fella
JDJonas Dittmann
Jonas Dittmann
DMDominik Muller
Dominik Muller
TDTilman Donath
Tilman Donath
DMDavid Murer
David Murer
RHRandolf Hanke
Randolf Hanke

5 August 2021 in Applied Sciences
Verified
Journal Article
Open access
PDF file
AOAlexander Opolka
Alexander Opolka
DMDominik Müller
Dominik Müller
CFChristian Fella
Christian Fella
ABAndreas Balles
Andreas Balles
JMJürgen Mohr
Jürgen Mohr
ALArndt Last
Arndt Last
X-ray full-field microscopy at laboratory sources for photon energies above 10 keV suffers from either long exposure times or low resolution. The photon flux is mainly limited by the objectives used, having a limited numerical aperture NA. We show that this can be overcome by making use of the cone-beam illumination of laboratory sources by imaging the same field of view (FoV) several times under slightly different angles using an array of X-ray lenses. Using this technique, the exposure time can be reduced drastically without any loss in terms of resolution. A proof-of-principle is given using an existing laboratory metal-jet source at the 9.25 keV Ga Kα-line and compared to a ray-tracing simulation of the setup.