Sjoerd Bouma
A5030955188- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Solar and Space Plasma Dynamics
- Particle accelerators and beam dynamics
- Quantum Chromodynamics and Particle Interactions
- Cryospheric studies and observations
- Geophysics and Gravity Measurements
- Arctic and Antarctic ice dynamics
- High-Energy Particle Collisions Research
- Radio, Podcasts, and Digital Media
- Atmospheric Ozone and Climate
- Radio Wave Propagation Studies
- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Soil Moisture and Remote Sensing
Friedrich-Alexander-Universität Erlangen-Nürnberg
2021-2024
Michigan State University
2023
University of Nebraska–Lincoln
2023
Uppsala University
2023
Ghent University
2023
Karlsruhe Institute of Technology
2023
Instituto de Tecnologías en Detección y Astropartículas
2023
National University of General San Martín
2023
Korea Polar Research Institute
2023
Kavli Institute for Particle Astrophysics and Cosmology
2023
Abstract Since summer 2021, the Radio Neutrino Observatory in Greenland (RNO-G) is searching for astrophysical neutrinos at energies $${>10}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mo>></mml:mo> <mml:mn>10</mml:mn> </mml:mrow> </mml:math> PeV by detecting radio emission from particle showers ice around Summit Station, Greenland. We present an extensive simulation study that shows how RNO-G will be able to measure energy of such cascades, which turn...
Abstract In-ice radio detectors are a promising tool for the discovery of EeV neutrinos. For astrophysics, implications such will rely on reconstruction neutrino arrival direction. This paper describes first complete direction employing deep antennas as RNO-G or planning to employ them like IceCube-Gen2. We didactically introduce challenges using emission in ice, elaborate detail algorithm used, and describe obtainable performance based simulation study discuss its implication astrophysics.
Abstract The Radio Neutrino Observatory in Greenland (RNO-G) is the first in-ice radio array northern hemisphere for detection of ultra-high energy neutrinos via coherent emission from neutrino-induced particle cascades within ice. currently phased construction near Summit Station on ice sheet, with 7 stations deployed during two boreal summer field seasons 2021 and 2022. In this paper, we describe installation system design these initial RNO-G stations, discuss performance as 2024.
Abstract The LOw Frequency ARray (LOFAR) radio telescope possesses the unique capability to measure ultra‐high energy cosmic rays as well image lightning discharges. This study presents a comparison between inferred thunderstorm charge structures derived from cosmic‐ray measurements and flashes. Our results show basic triple‐layered distribution: positive upper layer, main negative lower layer. However, our measurement shows bottom‐heavy structure, where in positively charged layer is...
Over the last 25 years, radiowave detection of neutrino-generated signals, using cold polar ice as neutrino target, has emerged perhaps most promising technique for extragalactic ultra-high energy neutrinos (corresponding to energies in excess 0.01 Joules, or $10^{17}$ electron volts). During summer 2021 and tandem with initial deployment Radio Neutrino Observatory Greenland (RNO-G), we conducted radioglaciological measurements at Summit Station, refine our understanding target. We report...
Direction reconstruction for the Radio Neutrino Observatory Greenland The (RNO-G) is planned to be first large-scale implementation of in-ice radio detection technique. It targets astrophysical as well cosmogenic neutrinos with energies above 10 PeV. deep component a single RNO-G station consists three strings antennas capture horizontal vertical polarization. This contribution shows model-based approach reconstruct direction an station. timing waveforms used vertex position and shape...
Abstract The TAROGE-M radio observatory is a self-triggered antenna array on top of the ∼2700 m high Mt. Melbourne in Antarctica, designed to detect impulsive geomagnetic emission from extensive air showers induced by ultra-high energy (UHE) particles beyond 10 17 eV, including cosmic rays, Earth-skimming tau neutrinos, and particularly, “ANITA anomalous events” (AAE) near below horizon. six AAE discovered ANITA experiment have signal features similar neutrinos but that hypothesis tension...
The Radio Neutrino Observatory – Greenland (RNO-G) seeks discovery of ultra-high energy neutrinos from the cosmos through their interactions in ice. science program extends beyond particle astrophysics to include radioglaciology and, as we show herein, solar observations, well. Currently seven 35 planned radio-receiver stations (24 antennas/station) are operational. These sensitive impulsive radio signals with frequencies between 80 and 700 MHz feature a neutrino trigger threshold for...
Abstract The ARIANNA experiment is an Askaryan detector designed to record radio signals induced by neutrino interactions in the Antarctic ice. Because of low flux at high energies (E_ν> 10^16 eV), physics output limited statistics. Hence, increase sensitivity significantly improves interpretation data and offers ability probe new parameter spaces. amplitudes trigger threshold are rate triggering on unavoidable thermal noise fluctuations. We present a real-time rejection algorithm that...
The ARIANNA detector is designed to detect neutrinos with energies above $10^{17}$eV. Due the similarities in generated radio signals, cosmic rays are often used as test beams for neutrino detectors. Some stations equipped antennas capable of detecting air showers. Since emission properties showers well understood, and polarization signal can be predicted from arrival direction, a proxy assess reconstruction capabilities detector. We report on dedicated efforts reconstructing cosmic-ray...
The IceCube Neutrino Observatory, a cubic-kilometer-scale neutrino detector at the geographic South Pole, has reached number of milestones in field astrophysics: discovery high-energy astrophysical flux, temporal and directional correlation neutrinos with flaring blazar, steady emission from direction an active galaxy Seyfert II type Milky Way. next generation telescope, IceCube-Gen2, currently under development, will consist three essential components: array about 10,000 optical sensors,...
The Radio Neutrino Observatory – Greenland (RNO-G) is an in-ice neutrino detector currently under construction. designed to make the first measurement of neutrinos beyond energies $\sim$10 PeV. Each planned 35 stations includes three log-periodic dipole array antennas (LPDA) pointing towards sky. cover area $\sim$ 50 km$^2$ and enable RNO-G measure radio emission cosmic-ray induced air-showers, thus making it a as well. As other experiments have shown, such can be used precision...
The science goals of IceCube-Gen2 include multi-messenger astronomy, astroparticle and particle physics. To this end, the observatory will several detection methods, including a surface array in-ice optical sensors. have an approximately 8 km$^{2}$ coverage, consisting elevated scintillator panels radio antennas to detect air showers in energy range 100 TeV few EeV. observatory’s design is unique that measurements using can be combined with observations ≥ 300 GeV muons, produced hadronic...
Abstract We recently reported on the radio-frequency attenuation length of cold polar ice at Summit Station, Greenland, based bi-static radar measurements bedrock echo strengths taken during summer 2021. Those data also allow studies (a) relative contributions coherent (such as discrete internal conducting layers with sub-centimeter transverse scale) vs incoherent (e.g. bulk volumetric) scattering, (b) magnitude layer reflection coefficients, (c) limits signal propagation velocity...
The Radio Neutrino Observatory in Greenland (RNO-G) is the first in-ice radio array northern hemisphere for detection of ultra-high energy neutrinos via coherent emission from neutrino-induced particle cascades within ice. currently phased construction near Summit Station on ice sheet, with 7~stations deployed during two boreal summer field seasons 2021 and 2022. In this paper, we describe installation system design these initial RNO-G stations, discuss performance as 2024.
In-ice radio neutrino detectors, such as the newly constructed and operational Radio Neutrino Observatory in Greenland (RNO-G), rely on ice models to understand in-ice signal propagation. Most often is approximated first order by a single exponential profile because it allows for computationally fast However, do not encompass whole complexity of ice, which may lead systematic uncertainties. This especially true upper part (the firn) where most RNO-G antennas are situated. Therefore, we...
The Radio Neutrino Observatory in Greenland (RNO-G) is the only ultrahigh energy (UHE, ${\gtrsim}30$ PeV) neutrino monitor of Northern sky and will soon be world's most sensitive high-uptime detector UHE neutrinos. Because this, RNO-G represents an important piece multimessenger landscape over next decade. In this talk, we highlight RNO-G's capabilities its potential to provide key information search for extreme astrophysical accelerators. particular, opportunities enabled by unique...
The Radio Neutrino Observatory in Greenland (RNO-G) is designed to make the first observations of ultra-high energy neutrinos at energies above 10 PeV, playing a unique role multi-messenger astrophysics as world's largest in-ice Askaryan radio detection array. experiment will be composed 35 autonomous stations deployed over 5 x 6 km grid near NSF Summit Station Greenland. electronics chain each station optimized for sensitivity and low power, incorporating 150 - 600 MHz RF antennas both...
The science program of the Radio Neutrino Observatory-Greenland (RNO-G) extends beyond particle astrophysics to include radioglaciology and, as we show herein, solar physics, well. Impulsive flare observations not only permit direct measurements light curves, spectral content, and polarization on time scales significantly shorter than most extant dedicated observatories, but also offer an extremely useful above-surface calibration source, with pointing precision order tens arc-minutes. Using...
The LOw Frequency ARray (LOFAR) has successfully measured cosmic rays for over a decade now. With its dense core of antenna fields in the Netherlands, it is an ideal tool studying radio emission from extensive air showers $10^{16}$ eV to $10^{18.5}$ range. Every shower with small particle detector array and hundreds antennas, which sets LOFAR apart other arrays. We present our current achievements progress reconstruction, interpolation, software development during final phases measurement...
The LOw Frequency ARray (LOFAR) has successfully measured cosmic rays for over a decade now. With its dense core of antenna fields in the Netherlands, it is an ideal tool studying radio emission from extensive air showers 10^{16} eV to 10^{18.5} range. Every shower with small particle detector array and hundreds antennas, which sets LOFAR apart other arrays. We present our current achievements progress reconstruction, interpolation, software development during final phases measurement 1.0,...
The Radio Neutrino Observatory in Greenland (RNO-G) is a detector under construction that will be sensitive to Askaryan emission from ultra-high energy neutrinos. Located Summit Station, Greenland, RNO-G consists of multiple "stations" 24 antennas each, which include deep buried down 100 m the ice and surface improve our understanding backgrounds. As grows size, so does its potential detect first astrophysical neutrino above 10 PeV. Seven planned 35 stations are currently deployed...
The LOFAR radio telescope has been used to measure emission from cosmic-ray air showers in the $10^{16.5}-10^{18}$~eV range for over a decade. is currently undergoing an upgrade (LOFAR 2.0) which will enable continuous observation and tenfold increase data rate, as well wider measurement bandwidth. We have recently doubled size of particle detector triggering array located at maximize benefits this upgrade. are also developing new analysis techniques pipelines order best utilize influx...
The low-frequency part of the SKA, to be built in Australia, will have an extremely high antenna density roughly 60,000 antennas within one square kilometer, and is perfect site for highresolution studies air showers. Individual showers observed with thousands simultaneously. depth shower maximum Xmax can reconstructed a resolution 10 g/cm$^2$ using methods currently used by LOFAR Pierre Auger Observatory. However, high-resolution SKA data allows development new that reconstruct more...