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Andreas Kopmann
Karlsruhe Institute of Technology
125Publications
11H-index
1,644Citations
Publications 131
Newest
#1M. AkerH-Index: 2
#2K. AltenmüllerH-Index: 7
Last.G. ZellerH-Index: 3
view all 209 authors...
We report on the neutrino mass measurement result from the first four-week science run of the Karlsruhe Tritium Neutrino experiment KATRIN in spring 2019. Beta-decay electrons from a high-purity gaseous molecular tritium source are energy analyzed by a high-resolution MAC-E filter. A fit of the integrated electron spectrum over a narrow interval around the kinematic endpoint at 18.57 keV gives an effective neutrino mass square value of (-1.0^{+0.9}_{-1.1})eV^2 From this we derive an upper ...
18 CitationsSource
4 CitationsSource
#1M. AkerH-Index: 2
#2C. WeinheimerH-Index: 5
Last.C. RodenbeckH-Index: 4
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The KArlsruhe TRItium Neutrino experiment (KATRIN) aims to determine the effective electron (anti)neutrino mass with a sensitivity of 0.2\textrm{ eV/c}^2(90\%C.L.) by precisely measuring the endpoint region of the tritium \betadecay spectrum. It uses a tandem of electrostatic spectrometers working as MAC-E (magnetic adiabatic collimation combined with an electrostatic) filters. In the space between the pre-spectrometer and the main spectrometer, an unavoidable Penning trap is created wh...
#1M. AkerH-Index: 2
#2C. WeinheimerH-Index: 5
Last.G. P. ZellerH-Index: 17
view all 171 authors...
The determination of the neutrino mass is one of the major challenges in astroparticle physics today. Direct neutrino mass experiments, based solely on the kinematics of beta-decay, provide a largely model-independent probe to the neutrino mass scale. The Karlsruhe Tritium Neutrino (KATRIN) experiment is designed to directly measure the effective electron antineutrino mass with a sensitivity of 0.2 eV 90% CL. In this work we report on the first operation of KATRIN with tritium which took place i...
3 Citations
#1K. Altenmüller (TUM: Technische Universität München)H-Index: 7
#2M. Arenz (University of Bonn)H-Index: 4
Last.G. P. Zeller (KIT: Karlsruhe Institute of Technology)H-Index: 17
view all 126 authors...
The KATRIN experiment aims to measure the effective electron antineutrino mass \(m_{\overline{\nu }_e}\) with a sensitivity of \({0.2}\,{\hbox {eV}/\hbox {c}^2}\) using a gaseous tritium source combined with the MAC-E filter technique. A low background rate is crucial to achieving the proposed sensitivity, and dedicated measurements have been performed to study possible sources of background electrons. In this work, we test the hypothesis that gamma radiation from external radioactive sources si...
1 CitationsSource
#1Nicholas Tan Jerome (KIT: Karlsruhe Institute of Technology)H-Index: 2
#2Zhassulan Ateyev (Tomsk Polytechnic University)
Last.Andreas Kopmann (KIT: Karlsruhe Institute of Technology)H-Index: 11
view all 5 authors...
Removing noise in computer tomography (CT) data for real-time 3-D visualization is vital to improve 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 subregions around a central region. We compare our f...
Source
#1K. AltenmüllerH-Index: 7
#2M. ArenzH-Index: 4
Last.G. P. ZellerH-Index: 17
view all 127 authors...
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...
#1Michele CaselleH-Index: 17
#2Erik BründermannH-Index: 22
Last.Serge BielawskiH-Index: 17
view all 19 authors...
KALYPSO is a novel detector operating at line rates above 10 Mfps. The detector board holds a silicon or InGaAs linear array sensor with spectral sensitivity ranging from 400 nm to 2600 nm. The sensor is connected to a cutting-edge, custom designed, ASIC readout chip, which is responsible for the remarkable frame rate. The FPGA readout architecture enables continuous data acquisition and processing in real time. This detector is currently employed in many synchrotron facilities for beam diagnost...
Source
#1Michele Caselle (KIT: Karlsruhe Institute of Technology)H-Index: 17
#2Lorenzo Rota (KIT: Karlsruhe Institute of Technology)H-Index: 5
Last.Serge BielawskiH-Index: 17
view all 14 authors...
KALYPSO is a novel detector operating at line rates above 10 Mfps. It consists of a detector board connected to FPGA based readout card for real time data processing. The detector board holds a Si or InGaAs linear array sensor, with spectral sensitivity ranging from 400 nm to 2600 nm, which is connected to a custom made front-end ASIC. A FPGA readout framework performs the real time data processing. In this contribution, we present the detector system, the readout electronics and the heterogeneo...
Source
#1K. Altenmüller (TUM: Technische Universität München)H-Index: 7
#2M. Arenz (University of Bonn)H-Index: 4
Last.G. P. Zeller (KIT: Karlsruhe Institute of Technology)H-Index: 17
view all 134 authors...
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/c2. 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 system...
1 CitationsSource
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