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A. Kopmann
Karlsruhe Institute of Technology
119Publications
10H-index
959Citations
Publications 119
Newest
Published on Jan 1, 2019in IEEE Transactions on Nuclear Science 1.43
Nicholas Tan Jerome1
Estimated H-index: 1
,
Zhassulan Ateyev + 2 AuthorsA. Kopmann10
Estimated H-index: 10
Removing noise in computer tomography (CT) data for real-time 3D visualization is vital to improving the quality of the final display. However, the CT noise cannot be removed by straight averaging because the noise has a broadband spatial frequency that is overlapping with the interesting signal frequencies. To improve the display of structures and features contained in the data, we present spatially variant filtering that performs averaging of sub-regions around a central region. We compare our...
Published on Mar 15, 2019in arXiv: Instrumentation and Detectors
K. Altenmüller1
Estimated H-index: 1
,
M. Arenz3
Estimated H-index: 3
+ 124 AuthorsKlaus Blaum44
Estimated H-index: 44
In this work, we present the first spectroscopic measurements of conversion electrons originating from the decay of metastable gaseous ^\mathrm{83m}r with the Karlsruhe Tritium Neutrino (KATRIN) experiment. The results obtained in this calibration measurement represent a major commissioning milestone for the upcoming direct neutrino mass measurement with KATRIN. The successful campaign demonstrates the functionalities of the full KATRIN beamline. The KATRIN main spectrometer's excellent energ...
Published on Mar 4, 2019
M. Caselle19
Estimated H-index: 19
,
Erik Bründermann21
Estimated H-index: 21
+ 16 AuthorsAleksander Mielczarek7
Estimated H-index: 7
Published on Mar 1, 2019
M. Caselle19
Estimated H-index: 19
,
Lorenzo Rota4
Estimated H-index: 4
+ 11 AuthorsGudrun Niehues6
Estimated H-index: 6
Published on Mar 1, 2019in Astroparticle Physics 2.60
K. Altenmüller1
Estimated H-index: 1
(TUM: Technische Universität München),
M. Arenz3
Estimated H-index: 3
(University of Bonn)
+ 131 AuthorsKlaus Blaum44
Estimated H-index: 44
(MPG: Max Planck Society)
Abstract The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to make a model-independent determination of the effective electron antineutrino mass with a sensitivity of 0.2 eV/c 2 . It investigates the kinematics of β -particles from tritium β -decay close to the endpoint of the energy spectrum. Because the KATRIN main spectrometer (MS) is located above ground, muon-induced backgrounds are of particular concern. Coincidence measurements with the MS and a scintillator-based muon detector syst...
Published on Dec 1, 2018in Nature Communications 11.88
Thomas van de Kamp9
Estimated H-index: 9
(KIT: Karlsruhe Institute of Technology),
Achim H. Schwermann4
Estimated H-index: 4
(University of Bonn)
+ 15 AuthorsA. Kopmann10
Estimated H-index: 10
(KIT: Karlsruhe Institute of Technology)
About 50% of all animal species are considered parasites. The linkage of species diversity to a parasitic lifestyle is especially evident in the insect order Hymenoptera. However, fossil evidence for host–parasitoid interactions is extremely rare, rendering hypotheses on the evolution of parasitism assumptive. Here, using high-throughput synchrotron X-ray microtomography, we examine 1510 phosphatized fly pupae from the Paleogene of France and identify 55 parasitation events by four wasp species,...
Published on Nov 1, 2018in Crystallography Reports 0.75
A. V. Buzmakov6
Estimated H-index: 6
(RAS: Russian Academy of Sciences),
V. E. Asadchikov2
Estimated H-index: 2
(MSU: Moscow State University)
+ 12 AuthorsYu. S. Krivonosov3
Estimated H-index: 3
(RAS: Russian Academy of Sciences)
Published on Sep 1, 2018
S. Chilingaryan9
Estimated H-index: 9
(KIT: Karlsruhe Institute of Technology),
Evelina Ametova2
Estimated H-index: 2
(Katholieke Universiteit Leuven)
+ 1 AuthorsAlessandro Mirone17
Estimated H-index: 17
Synchrotron X-ray imaging is a powerful method to investigate internal structures down to the micro and nanoscopic scale. Fast cameras recording thousands of frames per second allow time-resolved studies with a high temporal resolution. Fast image reconstruction is essential to provide the synchrotron instrumentation with the imaging information required to track and control the process under study. Traditionally Filtered Back Projection algorithm is used for tomographic reconstruction. In this ...
Published on Sep 1, 2018
M. Arenz3
Estimated H-index: 3
,
W.-J. Baek3
Estimated H-index: 3
+ 126 AuthorsU. Besserer5
Estimated H-index: 5
Published on Sep 1, 2018in European Physical Journal C 4.84
M. Arenz3
Estimated H-index: 3
(University of Bonn),
W.-J. Baek3
Estimated H-index: 3
(KIT: Karlsruhe Institute of Technology)
+ 126 AuthorsU. Besserer5
Estimated H-index: 5
(KIT: Karlsruhe Institute of Technology)
The KATRIN experiment aims to determine the effective electron neutrino mass with a sensitivity of \({0.2}{\hbox { eV/c}^{2}}\) (%90 CL) by precision measurement of the shape of the tritium \(\upbeta \)-spectrum in the endpoint region. The energy analysis of the decay electrons is achieved by a MAC-E filter spectrometer. A common background source in this setup is the decay of short-lived isotopes, such as \({}^{\text {219}}\text {Rn}\) and \({}^{\text {220}}\text {Rn}\), in the spectrometer vol...
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