Lindsay M. Berkhout
A5092532046- Radio Astronomy Observations and Technology
- Astrophysics and Cosmic Phenomena
- Gyrotron and Vacuum Electronics Research
- Antenna Design and Optimization
- Microwave Engineering and Waveguides
- Particle Accelerators and Free-Electron Lasers
- Pulsed Power Technology Applications
- Engineering Education and Pedagogy
- IoT Networks and Protocols
- Electromagnetic Compatibility and Measurements
- Millimeter-Wave Propagation and Modeling
- Particle accelerators and beam dynamics
- Superconducting and THz Device Technology
- Scientific Research and Discoveries
- Spacecraft Design and Technology
- Gamma-ray bursts and supernovae
- Satellite Communication Systems
- Radio Wave Propagation Studies
McGill University
2025
Arizona State University
2023-2025
University of Pennsylvania
2024
Abstract This paper presents the design and deployment of Hydrogen Epoch Reionization Array (HERA) phase II system. HERA is designed as a staged experiment targeting 21 cm emission measurements Reionization. First results from I array are published early 2022, system nearing completion. We describe discuss progress on commissioning future upgrades. As designated Square Kilometre pathfinder instrument, we also show number “case studies” that investigate systematics seen while system, which...
Abstract The precise characterization and mitigation of systematic effects is one the biggest roadblocks impeding detection fluctuations cosmological 21 cm signals. Missing data in radio experiments, often due to frequency interference (RFI), pose a particular challenge power spectrum analysis as this could lead ringing bright foreground modes Fourier space, heavily contaminating Here we show that problem missing becomes even more arduous presence effects. Using realistic numerical...
ABSTRACT Detection of the faint 21 cm line emission from Cosmic Dawn and Epoch Reionization will require not only exquisite control over instrumental calibration systematics to achieve necessary dynamic range observations but also validation analysis techniques demonstrate their statistical properties signal loss characteristics. A key ingredient in achieving this is ability perform high-fidelity simulations kinds data that are produced by large, many-element, radio interferometric arrays...
Interferometric experiments designed to detect the highly redshifted 21-cm signal from neutral hydrogen are producing increasingly stringent constraints on power spectrum, but some k-modes remain systematics-dominated. Mutual coupling is a major systematic that must be overcome in order signal, and simulations reproduce effects seen data can guide strategies for mitigating mutual coupling. In this paper, we analyse 12 nights of Hydrogen Epoch Reionization Array compare against include...
The 21 cm transition from neutral Hydrogen promises to be the best observational probe of Epoch Reionisation (EoR). This has led construction low-frequency radio interferometric arrays, such as Reionization Array (HERA), aimed at systematically mapping this emission for first time. Precision calibration, however, is a requirement in observations. Due spatial compactness HERA, array prone effects mutual coupling, which inevitably lead non-smooth calibration errors that contaminate data. When...
This paper presents the design and deployment of Hydrogen Epoch Reionization Array (HERA) phase II system. HERA is designed as a staged experiment targeting 21 cm emission measurements Reionization. First results from I array are published early 2022, system nearing completion. We describe discuss progress on commissioning future upgrades. As designated Square Kilometer (SKA) pathfinder instrument, we also show number "case studies" that investigate systematics seen while system, which may...
Radio interferometers targeting the 21cm brightness temperature fluctuations at high redshift are subject to systematic effects that operate over a range of different timescales. These can be isolated by designing appropriate Fourier filters in fringe-rate (FR) space, pair local sidereal time (LST). Applications FR filtering include separating correlated with rotating sky vs. those relative ground, down-weighting emission primary beam sidelobes, and suppressing noise. causes noise...
ABSTRACT Radio interferometers targeting the 21cm brightness temperature fluctuations at high redshift are subject to systematic effects that operate over a range of different time-scales. These can be isolated by designing appropriate Fourier filters in fringe-rate (FR) space, pair local sidereal time. Applications FR filtering include separating correlated with rotating sky versus those relative ground, down-weighting emission primary beam sidelobes, and suppressing noise. causes noise...
Detection of the faint 21 cm line emission from Cosmic Dawn and Epoch Reionisation will require not only exquisite control over instrumental calibration systematics to achieve necessary dynamic range observations but also validation analysis techniques demonstrate their statistical properties signal loss characteristics. A key ingredient in achieving this is ability perform high-fidelity simulations kinds data that are produced by large, many-element, radio interferometric arrays have been...
ABSTRACT The 21 cm transition from neutral Hydrogen promises to be the best observational probe of Epoch Reionization (EoR). This has led construction low-frequency radio interferometric arrays, such as Array (HERA), aimed at systematically mapping this emission for first time. Precision calibration, however, is a requirement in observations. Due spatial compactness HERA, array prone effects mutual coupling, which inevitably lead non-smooth calibration errors that contaminate data. When...
Abstract We present the Completely Hackable Amateur Radio Telescope (CHART), a project that provides hands-on radio instrumentation and design experience to undergraduates while bringing accessible astronomy experiments high school students teachers. Here we describe system which can detect 21 cm emission from Milky Way is optimised for cost simplicity of construction. Software, documentation, tutorials are all completely open source improve user facilitate community involvement. demonstrate...
We present the Completely Hackable Amateur Radio Telescope (CHART), a project that provides hands-on radio instrumentation and design experience to undergraduates while bringing accessible astronomy experiments high school students teachers. Here we describe system which can detect 21-cm emission from Milky Way is optimized for cost simplicity of construction. Software, documentation, tutorials are all completely open source improve user facilitate community involvement. demonstrate with...
LightCube is a 1U educational CubeSat which had the goal of connecting public with space by producing flash visible to naked eye on command user. The spacecraft could be triggered via HAM radio communications those an amateur license. commanded DTMF sequence, and reports telemetry using RTTY, AFSK modulation scheme decoded custom GNURadio-companion flowgraph. Several applications were written, including from-scratch decoder written for purposes one optimized compatible SatNOGS environment....