Search Results - "Rachen, J. P."
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Radio Emission Reveals Inner Meter-Scale Structure of Negative Lightning Leader Steps
Published in Physical review letters (13-03-2020)“…We use the Low Frequency Array (LOFAR) to probe the dynamics of the stepping process of negatively charged plasma channels (negative leaders) in a lightning…”
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A distinct negative leader propagation mode
Published in Scientific reports (10-08-2021)“…The common phenomenon of lightning still harbors many secrets such as what are the conditions for lightning initiation and what is driving the discharge to…”
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Timing Calibration and Windowing Technique Comparison for Lightning Mapping Arrays
Published in Earth and space science (Hoboken, N.J.) (01-07-2021)“…Since their introduction 22 years ago, lightning mapping arrays (LMA) have played a central role in the investigation of lightning physics. Even in recent…”
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Monte Carlo simulations of photohadronic processes in astrophysics
Published in Computer physics communications (01-02-2000)“…A new Monte Carlo program for photohadronic interactions of relativistic nucleons with an ambient photon radiation field is presented. The event generator is…”
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Search for Cosmic Particles with the Moon and LOFAR
Published in EPJ Web of Conferences (01-01-2017)“…The low flux of the ultra-high energy cosmic rays (UHECR) at the highest energies provides a challenge to answer the long standing question about their origin…”
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Contributions to the cosmic ray flux above the ankle: clusters of galaxies
Published in Monthly notices of the Royal Astronomical Society (01-04-1997)“…Motivated by the suggestion of Kang, Ryu & Jones that particles can be accelerated to high energies via diffusive shock acceleration processes at the accretion…”
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BL Lac objects in the synchrotron proton blazar model
Published in Astroparticle physics (01-03-2003)“…We calculate the spectral energy distribution (SED) of electromagnetic radiation and the spectrum of high-energy neutrinos from BL Lac objects in the context…”
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The Relationship of Lightning Radio Pulse Amplitudes and Source Altitudes as Observed by LOFAR
Published in Earth and space science (Hoboken, N.J.) (01-04-2022)“…When a lightning flash is propagating in the atmosphere it is known that especially the negative leaders emit a large number of very high frequency (VHF) radio…”
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LOFAR Lightning Imaging: Mapping Lightning With Nanosecond Precision
Published in Journal of geophysical research. Atmospheres (16-03-2018)“…Lightning mapping technology has proven instrumental in understanding lightning. In this work we present a pipeline that can use lightning observed by the…”
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Determining Electric Fields in Thunderclouds With the Radiotelescope LOFAR
Published in Journal of geophysical research. Atmospheres (27-04-2020)“…An analysis is presented of electric fields in thunderclouds using a recently proposed method based on measuring radio emission from extensive air shower…”
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Photohadronic Processes in Astrophysical Environments
Published in Publications of the Astronomical Society of Australia (1999)“…We discuss the first applications of our newly developed Monte Carlo event generator SOPHIA to multiparticle photoproduction of relativistic protons with…”
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A large light-mass component of cosmic rays at 1017–1017.5 electronvolts from radio observations
Published in Nature (London) (03-03-2016)“…High-resolution radio measurements of air showers—cascades of secondary particles in the atmosphere initiated by cosmic rays—reveal that cosmic rays with…”
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Properties of the Lunar Detection Mode for ZeV-Scale Particles with LOFAR
Published in EPJ Web of Conferences (01-01-2019)“…The steep decrease of the flux of ultra-high energy cosmic rays (UHECR) provides a challenge to answer the long standing question about their origin and…”
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Journal Article Conference Proceeding -
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Updated Calibration of the LOFAR Low-Band Antennas
Published in EPJ Web of Conferences (01-01-2019)“…The LOw-Frequency ARray (LOFAR) telescope measures radio emission from air showers. In order to interpret the data, an absolute, frequency dependent…”
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The mass composition of cosmic rays measured with LOFAR
Published in EPJ Web of Conferences (01-01-2017)“…High-energy cosmic rays, impinging on the atmosphere of the Earth initiate cascades of secondary particles, the extensive air showers. The electrons and…”
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Circular polarization of radio emission from air showers in thunderstorm conditions
Published in EPJ Web of Conferences (01-01-2017)“…We present measured radio emission from cosmic-ray-induced air showers under thunderstorm conditions. We observe for these events large differences in…”
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Depth of shower maximum and mass composition of cosmic rays from 50 PeV to 2 EeV measured with the LOFAR radio telescope
Published 02-05-2021“…Phys. Rev. D 103, 102006 (2021) We present an updated cosmic-ray mass composition analysis in the energy range $10^{16.8}$ to $10^{18.3}$ eV from 334 air…”
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On the cosmic-ray energy scale of the LOFAR radio telescope
Published 29-09-2020“…Cosmic rays are routinely measured at LOFAR, both with a dense array of antennas and with the LOFAR Radboud air shower Array (LORA) which is an array of…”
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A large light-mass component of cosmic rays at 10(17)-10(17.5) electronvolts from radio observations
Published in Nature (London) (03-03-2016)“…Cosmic rays are the highest-energy particles found in nature. Measurements of the mass composition of cosmic rays with energies of 10(17)-10(18) electronvolts…”
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