Mohammad Ful Hossain Seikh
A5084401013- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Particle physics theoretical and experimental studies
- Radio Wave Propagation Studies
- Cryospheric studies and observations
- Particle accelerators and beam dynamics
- Pulsars and Gravitational Waves Research
- Computational Physics and Python Applications
- Particle Detector Development and Performance
- Geophysics and Gravity Measurements
- Precipitation Measurement and Analysis
- Soil Moisture and Remote Sensing
- Radio, Podcasts, and Digital Media
- Arctic and Antarctic ice dynamics
- Solar and Space Plasma Dynamics
- Gyrotron and Vacuum Electronics Research
- Atmospheric Ozone and Climate
- Antenna Design and Optimization
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Astronomical Observations and Instrumentation
- Cosmology and Gravitation Theories
University of Kansas
2022-2025
The University of Texas at Arlington
2023-2024
Clark Atlanta University
2023-2024
University of Alaska Anchorage
2023-2024
Providence College
2023-2024
Southern University and Agricultural and Mechanical College
2023-2024
Lawrence Berkeley National Laboratory
2023-2024
UCLouvain
2023
Université Libre de Bruxelles
2023
TU Dortmund University
2023
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.
In the pursuit of measurement still-elusive ultrahigh-energy (UHE) neutrino flux at energies order EeV, detectors using in-ice Askaryan radio technique have increasingly targeted lower trigger thresholds. This has led to improved trigger-level sensitivity UHE neutrinos. Working with data collected by Radio Array (ARA), we search for candidates lowest threshold achieved date, leading analysis-level sensitivities. A on a set 208.7~days livetime from reduced-threshold fifth ARA station 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...
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...
We recently reported on the radio-frequency attenuation length of cold polar ice at Summit Station, Greenland, based bistatic radar measurements bedrock echo strengths taken during summer 2021. Those data also include echoes attributed to stratified impurities or dielectric discontinuities within sheet (layers), which allow studies a) estimation relative contribution coherent (discrete layers, e.g.) vs. incoherent (bulk volumetric, scattering, b) magnitude internal layer reflection...
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...
The Payload for Ultrahigh Energy Observations (PUEO) long-duration balloon experiment is designed to observe ultra-high energy (UHE) neutrinos with energies above EeV. PUEO consists of a Main Instrument (MI) on fixed gondola and Low Frequency (LF) instrument that will be deployed under the main when reaches stratosphere. LF includes 8 sinuous antennas operate in 50-500 MHz range, complementing 96 dual-polarized horn constituting MI, receive signals 300-1200 range. sensitive impulsive,...
The Askaryan Radio Array (ARA) is an in-ice ultrahigh energy (UHE) neutrino experiment at the South Pole. ARA aims to detect radio emissions from neutrino-induced particle showers using clusters of antennas buried ${\sim}200$ m deep on a roughly cubical lattice with side length ${\sim}10$ m. has five such independent stations which have collectively accumulated ${\sim}30$ station-years livetime through 2023. fifth station additional sub-detector, known as phased array, pioneered...
The primary science goals of the Payload for Ultrahigh Energy Observations (PUEO) are testing models both candidate sources ultrahigh-energy neutrinos (UHEN) and propagation cosmic rays. PUEO is a balloon-borne observatory that scans Antarctic ice UHEN through their Askaryan emission (the successor to ANtarctic Impulsive Transient Antenna (ANITA)). payload design optimized detection impulsive radio emissions with characteristics such as wide bandwidth fast timing. challenge in reaching high...
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.
High energy cosmic neutrinos interacting in ice will induce a particle cascade. The Radar Echo Telescope (RET) aims to detect the neutrino through probing cascade by means of radar echo method. In order study this process, we simulate transmitting radio signal scatter off A return be detected at number user-defined receivers. Several properties signals have been observed when systematically varying direction cascade, such as patterns intensity and fourier transform amplitudes half, twice...
We introduce a new macroscopic model to simulate in-ice radar detection of high-energy particle cascades in dense media. High energy cosmic ray showers impacting high altitude ice sheet, or neutrinos interacting the produce cascade, which leaves short-lived plasma trail composed ionized electrons. Unlike direct radio methods, RET experiment aims use technique detect cascade via reflection waves off this plasma. The semi-analytical description presented work is based on well-known...
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...
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...
Glacial ice is used as a target material for the detection of ultra-high energy neutrinos, by measuring radio signals that are emitted when those neutrinos interact in ice. Thanks to large attenuation length at frequencies, these can be detected over distances several kilometers. One experiment taking advantage this Radio Neutrino Observatory Greenland (RNO-G), currently under construction Summit Station, near apex sheet. These experiments require thorough understanding dielectric properties...
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 Payload for Ultrahigh Energy Observations (PUEO) is a balloon-borne neutrino observatory currently under construction and slated to fly in December 2025. PUEO will be sensitive both Askaryan radio emission from interactions the ice, geomagnetic created either cosmic ray or tau leptons decaying. Separating air shower critical achieving PUEO's main science goal of measuring flux neutrinos above 1 EeV. In this contribution, I describe how sensitivity channel has been improved relative its...
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 Payload for Ultrahigh Energy Observations (PUEO) is a long-duration balloon payload under construction scheduled to fly over Antarctica in late 2025. PUEO will deploy broadband interferometric radio telescope pointing down at the ice sheet with primary science goal of detecting impulsive Askaryan emission expected accompany interactions ultrahigh-energy (UHE) neutrinos (> 1 EeV) glacial ice. PUEO’s design represents an order-of-magnitude improvement neutrino sensitivity compared...
PUEO (the Payload for Ultrahigh Energy Observations) is a balloon-borne payload designed to detect the impulsive radio signals produced through Askaryan effect by ultrahigh-energy (UHE) neutrinos (>1 EeV) in Antarctic ice. Several key upgrades over its predecessor ANITA allow an order of magnitude improvement sensitivity UHE neutrinos. These include interferometric phased array trigger, newly antennas that double overall collecting area above 300 MHz, dedicated low-frequency instrument...
To probe the cosmic particle flux at highest energies, large volumes of dense material like ice have to be monitored. This can achieved by exploiting radio signal. In this work, we provide a macroscopic model predict radar echo signatures found when signal is reflected from cosmic-ray or neutrino-induced cascade propagating in medium ice. Its nature allows for an energy independent run-time, taking less than 10 s simulating single scatter event. As first application, discuss basic properties...
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...
We develop an in-situ index of refraction profile using the transit time radio signals broadcast from englacial transmitter to 2-5 km distant radio-frequency receivers, deployed at depths up 200 m. Maxwell's equations generally admit two ray propagation solutions a given transmitter, corresponding direct path (D) and refracted (R); measured D vs. R (dt(D,R)) timing differences provide constraints on near South Pole, where Askaryan Radio Array (ARA) neutrino observatory is located. constrain...
The Radar Echo Telescope for Cosmic Rays (RET-CR), a pathfinder instrument the radar echo method of ultrahigh energy (UHE) neutrino detection, was initially deployed near Summit Station, Greenland, in May 2023. After 4 week commissioning period, 9 days data were taken before went offline. In this article, we describe as it deployed, and initial performance detector. We show that technical aspects running based particle cascade detector ice have been demonstrated. Analysis 2023 informed...