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pro vyhledávání: '"Nielsen, Christian P."'
Autor:
Nielsen, Christian F., Holtzapple, Robert, Lund, Mads M., Surrow, Jeppe H., Sørensen, Allan H., Sørensen, Marc B., Uggerhø, Ulrik I.
In this paper, we present experimental results and numerical simulations of trident production, $e^-\rightarrow e^-e^+e^-$, in a strong electromagnetic field. The experiment was conducted at CERN for the purpose of probing the strong-field parameter
Externí odkaz:
http://arxiv.org/abs/2307.03464
Autor:
Nielsen, Christian F., Holtzapple, Robert, Lund, Mads M., Surrow, Jeppe H., Sørensen, Allan H., Uggerhøj, Ulrik I.
We demonstrate experimentally that the trident process $e^-\rightarrow e^-e^+e^-$ in a strong external field, with a spatial extension comparable to the effective radiation length, is well understood theoretically. The experiment, conducted at CERN,
Externí odkaz:
http://arxiv.org/abs/2211.02390
In recent years, significant progress has been made in deep model-based automatic speech recognition (ASR), leading to its widespread deployment in the real world. At the same time, adversarial attacks against deep ASR systems are highly successful.
Externí odkaz:
http://arxiv.org/abs/2211.01621
Autor:
Zbiri, Mohamed, Gilhooly-Finn, Peter A., Fouquet, Peter, Nielsen, Christian B., Guilbert, Anne A. Y.
Publikováno v:
Chemistry of Materials, 34 (2022) 7937-7946
Organic solar cells (OSCs) based on ADA-type (acceptor-donor-acceptor) non-fullerene acceptors (NFAs) exhibit improved power conversion efficiency (PCE) compared to the conventional fullerene-based analogues. The optoelectronic properties of OSC acti
Externí odkaz:
http://arxiv.org/abs/2209.00106
A semi-classical approach is used to calculate radiation emission in the collision of an electron with an intense focused laser pulse. The results are compared to predictions from the locally constant field and locally monochromatic approximations. I
Externí odkaz:
http://arxiv.org/abs/2109.09490
Publikováno v:
Journal of Materials Chemistry C, 9 (2021) 11873
We present a neutron spectroscopy based method to study quantitatively the partial miscibility and phase behaviour of an organic photovoltaic active layer made of conjugated polymer:small molecule blends, presently illustrated with the regio-random p
Externí odkaz:
http://arxiv.org/abs/2104.09687
Autor:
Guilbert, Anne A. Y., Parr, Zachary S., Kreouzis, Theo, Woods, Duncan J., Sprick, Reiner S., Abrahams, Isaac, Nielsen, Christian B., Zbiri, Mohamed
Publikováno v:
Physical Chemistry Chemical Physics, 23 (2021) 7462
The processability and optoelectronic properties of organic semiconductors can be tuned and manipulated via chemical design. The substitution of the alkyl side chains by oligoethers has recently been successful for applications such as bioelectronic
Externí odkaz:
http://arxiv.org/abs/2101.08876
Autor:
Nielsen, Christian F., Justesen, Jens B., Sørensen, Allan H., Uggerhøj, Ulrik I, Holtzapple, Robert
Publikováno v:
Phys. Rev. D 102, 052004 (2020)
An accelerated charged particle emits electromagnetic radiation. If the driving force is sufficiently strong, the radiated energy becomes comparable to the kinetic energy of the particle and the back-action of the emitted radiation (radiation reactio
Externí odkaz:
http://arxiv.org/abs/2008.10411
Akademický článek
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Autor:
Nielsen, Christian Flohr
In this paper we describe and demonstrate a C++ code written to determine the trajectory of particles traversing oriented single crystals and a CUDA code written to evaluate the radiation spectra from charged particles with arbitrary trajectories. Th
Externí odkaz:
http://arxiv.org/abs/1910.10391