C. Hast
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View article: Initial performance of the Radar Echo Telescope for Cosmic Rays, RET-CR
Initial performance of the Radar Echo Telescope for Cosmic Rays, RET-CR Open
The Radar Echo Telescope for Cosmic Rays (RET-CR), a pathfinder instrument for the radar echo method of ultrahigh energy (UHE) neutrino detection, was initially deployed near Summit Station, Greenland, in May 2023. After a 4 week commissio…
View article: Wakefield generation in hydrogen and lithium plasmas at FACET-II: Diagnostics and first beam-plasma interaction results
Wakefield generation in hydrogen and lithium plasmas at FACET-II: Diagnostics and first beam-plasma interaction results Open
Plasma wakefield acceleration provides ultrahigh acceleration gradients of tens of GeV/m, providing a novel path toward efficient, compact, TeV-scale linear colliders, and high brightness free electron lasers. Critical to the success of th…
View article: Macroscopic approach to the radar echo scatter from high-energy particle cascades
Macroscopic approach to the radar echo scatter from high-energy particle cascades Open
To probe the cosmic particle flux at the highest energies, large volumes of dense material like ice have to be monitored. This can be achieved by exploiting the radio signal. In this work, we provide a macroscopic model to predict the rada…
View article: Wakefield Generation in Hydrogen and Lithium Plasmas at FACET-II: Diagnostics and First Beam-Plasma Interaction Results
Wakefield Generation in Hydrogen and Lithium Plasmas at FACET-II: Diagnostics and First Beam-Plasma Interaction Results Open
Plasma Wakefield Acceleration (PWFA) provides ultrahigh acceleration gradients of 10s of GeV/m, providing a novel path towards efficient, compact, TeV-scale linear colliders and high brightness free electron lasers. Critical to the success…
View article: Macroscopic approach to the radar echo scatter from high-energy particle cascades
Macroscopic approach to the radar echo scatter from high-energy particle cascades Open
To probe the cosmic particle flux at the highest energies, large volumes of dense material like ice have to be monitored. This can be achieved by exploiting the radio signal. In this work, we provide a macroscopic model to predict the rada…
View article: Status and first results from FACET-II towards the demonstration of plasma wakefield acceleration, coherent radiation generation, and probing strong-field QED
Status and first results from FACET-II towards the demonstration of plasma wakefield acceleration, coherent radiation generation, and probing strong-field QED Open
FACET-II is a National User Facility at SLAC National Accelerator Laboratory with the goal to develop advanced acceleration and coherent radiation techniques using a 10 GeV electron beam of unprecedented beam intensity with >100 kA peak cu…
View article: Status and future plans for C<sup>3</sup> R&D
Status and future plans for C<sup>3</sup> R&D Open
C 3 is an opportunity to realize an e + e - collider for the study of the Higgs boson at √ s = 250 GeV, with a well defined upgrade path to 550 GeV while staying on the same short facility footprint [2,3]. C 3 is based on a fundamentally n…
View article: Updated studies of radio propagation through polar firn using paraPropPython
Updated studies of radio propagation through polar firn using paraPropPython Open
Ultra high energy neutrinos can be detected by measurement of radio emission, produced either\nfrom Askaryan emission, or via reflection of an in-ice radar transmission off the neutrino’s\nionization trail. Accurate reconstruction of the p…
View article: The Radar Echo Telescope for Cosmic Rays
The Radar Echo Telescope for Cosmic Rays Open
The Radar Echo Telescope for Cosmic Rays (RET-CR) was deployed in May 2023. RET-CR aims to show the in-nature viability of the radar echo method to probe in-ice particle cascades induced by ultra high energy cosmic rays and neutrinos. The …
View article: MARES: A macroscopic model for the Radar Echo Telescope Contribution to ICRC 2023
MARES: A macroscopic model for the Radar Echo Telescope Contribution to ICRC 2023 Open
Upon interaction in a dense medium like polar ice, a high-energy neutrino will deposit its energy abruptly, producing a short-lived electron plasma. The Radar Echo Telescope (RET) collaboration aims to utilize the radar technique to probe …
View article: A macroscopic model of radar detection for the Radar Echo Telescope
A macroscopic model of radar detection for the Radar Echo Telescope Open
We introduce a new macroscopic model to simulate in-ice radar detection of high-energy particle\ncascades in dense media. High energy cosmic ray showers impacting a high altitude ice sheet, or\ncosmic neutrinos interacting in the ice produ…
View article: From signal properties toward reconstruction for the Radar Echo Telescope for neutrinos
From signal properties toward reconstruction for the Radar Echo Telescope for neutrinos Open
High energy cosmic neutrinos interacting in ice will induce a particle cascade. The Radar Echo Telescope (RET) aims to detect the neutrino through probing the cascade by means of the radar echo method. In order to study this process, we si…
View article: The Radar Echo Telescope: Detection of Ultra High Energy Neutrinos and Cosmic Rays Using the Radar Echo Technique
The Radar Echo Telescope: Detection of Ultra High Energy Neutrinos and Cosmic Rays Using the Radar Echo Technique Open
The SLAC T-576 beam test has shown the radar echo detection method as a feasible technique to probe high-energy-particle-initiated cascades in dense media, such as ice. Furthermore, particle-level simulations show that the radar echo metho…
View article: Picosecond timing planes for future collider detectors
Picosecond timing planes for future collider detectors Open
We report experimental test-beam results on dielectric-loaded waveguide detectors that utilize microwave Cherenkov signals to time and characterize high energy particle showers. These results are used to validate models and produce high-fi…
View article: Analysis of a tau neutrino origin for the near-horizon air shower events observed by the fourth flight of the Antarctic Impulsive Transient Antenna
Analysis of a tau neutrino origin for the near-horizon air shower events observed by the fourth flight of the Antarctic Impulsive Transient Antenna Open
We study in detail the sensitivity of the Antarctic Impulsive Transient Antenna (ANITA) to possible Formula Presented point source fluxes detected via Formula Presented-lepton-induced air showers. This investigation is framed around the ob…
View article: FACET-II
FACET-II Open
FACET-II is a National User Facility at SLAC National Accelerator Laboratory providing 10 GeV electron beams with um-rad normalised emittance and peak currents exceeding 100 kA . FACET-II operates as a National User Facility while engaging…
View article: Analysis of a Tau Neutrino Origin for the Near-Horizon Air Shower Events Observed by the Fourth Flight of the Antarctic Impulsive Transient Antenna (ANITA)
Analysis of a Tau Neutrino Origin for the Near-Horizon Air Shower Events Observed by the Fourth Flight of the Antarctic Impulsive Transient Antenna (ANITA) Open
We study in detail the sensitivity of the Antarctic Impulsive Transient Antenna (ANITA) to possible $ν_τ$ point source fluxes detected via $τ$-lepton-induced air showers. This investigation is framed around the observation of four upward-g…
View article: The Radar Echo Telescope for Cosmic Rays: Pathfinder experiment for a next-generation neutrino observatory
The Radar Echo Telescope for Cosmic Rays: Pathfinder experiment for a next-generation neutrino observatory Open
The Radar Echo Telescope for Cosmic Rays (RET-CR) is a recently initiated experiment designed to detect the englacial cascade of a cosmic-ray initiated air shower via in-ice radar, toward the goal of a full-scale, next-generation experimen…
View article: The Payload for Ultrahigh Energy Observations (PUEO): a white paper
The Payload for Ultrahigh Energy Observations (PUEO): a white paper Open
The Payload for Ultrahigh Energy Observations (PUEO) long-duration balloon\nexperiment is designed to have world-leading sensitivity to ultrahigh-energy\nneutrinos at energies above 1 EeV. Probing this energy region is essential for\nunder…
View article: The Radar Echo Telescope for Neutrinos (RET-N)
The Radar Echo Telescope for Neutrinos (RET-N) Open
We present the Radar Echo Telescope for Neutrinos (RET-N). RET-N focuses on the detection of the cosmic neutrino flux above PeV energies by means of the radar detection technique. This method aims to bridge the energy gap between the diffu…
View article: Discovering the Highest Energy Neutrinos with the Payload for Ultrahigh Energy Observations (PUEO)
Discovering the Highest Energy Neutrinos with the Payload for Ultrahigh Energy Observations (PUEO) Open
The Payload for Ultrahigh Energy Observations (PUEO) is a NASA Long-Duration Balloon Mission that has been selected for concept development. PUEO has unprecedented sensitivity to ultra-high energy neutrinos above $10^{18}$ eV. PUEO will be…
View article: Toward High Energy Neutrino Detection with the Radar Echo Telescope for Cosmic Rays (RET-CR)
Toward High Energy Neutrino Detection with the Radar Echo Telescope for Cosmic Rays (RET-CR) Open
The Radar Echo Telescope for Cosmic Rays (RET-CR) is a pathfinder experiment for the Radar Echo Telescope for Neutrinos (RET-N), a next-generation in-ice detection experiment for ultra high energy neutrinos. RET-CR will serve as the testbe…
View article: Investigating signal properties of UHE particles using in-ice radar for the RET experiment
Investigating signal properties of UHE particles using in-ice radar for the RET experiment Open
The Radar Echo Telescope (RET) experiment plans to use the radar technique to detect Ultra-High Energy (UHE) cosmic rays and neutrinos in the polar ice sheets. Whenever an UHE particle collides with an ice molecule, it produces a shower of…
View article: Application of parabolic equation methods to in-ice radiowave propagation for ultra high energy neutrino detection experiments
Application of parabolic equation methods to in-ice radiowave propagation for ultra high energy neutrino detection experiments Open
Many ultra-high-energy neutrino-detection experiments seek radio wave signals from neutrino interactions deep within the polar ice, and an understanding of in-ice radio wave propagation is therefore of critical importance. The parabolic eq…
View article: Simulation and Optimisation for the Radar Echo Telescope for Cosmic Rays
Simulation and Optimisation for the Radar Echo Telescope for Cosmic Rays Open
The SLAC T-576 beam test experiment showed the feasibility of the radar detection technique to probe high-energy particle cascades in dense media. Corresponding particle-level simulations indicate that the radar method has very promising s…
View article: Modeling in-ice radio propagation with parabolic equation methods
Modeling in-ice radio propagation with parabolic equation methods Open
We investigate the use of parabolic equation (PE) methods for solving\nradio-wave propagation in polar ice. PE methods provide an approximate solution\nto Maxwell's equations, in contrast to full-field solutions such as\nfinite-difference-…
View article: The Radar Echo Telescope for Cosmic Rays: Pathfinder Experiment for a\n Next-Generation Neutrino Observatory
The Radar Echo Telescope for Cosmic Rays: Pathfinder Experiment for a\n Next-Generation Neutrino Observatory Open
The Radar Echo Telescope for Cosmic Rays (RET-CR) is a recently initiated\nexperiment designed to detect the englacial cascade of a cosmic-ray initiated\nair shower via in-ice radar, toward the goal of a full-scale, next-generation\nexperi…
View article: Unusual Near-Horizon Cosmic-Ray-like Events Observed by ANITA-IV
Unusual Near-Horizon Cosmic-Ray-like Events Observed by ANITA-IV Open
ANITA's fourth long-duration balloon flight in 2016 detected 29 cosmic-ray (CR)-like events on a background of 0.37_{-0.17}^{+0.27} anthropogenic events. CRs are mainly seen in reflection off the Antarctic ice sheets, creating a phase-inve…
View article: Ultra-high Energy Air Showers Observed by ANITA-IV
Ultra-high Energy Air Showers Observed by ANITA-IV Open
ANITA's fourth long-duration balloon flight in late 2016 detected 29 cosmic-ray (CR)-like events on a background of $0.37^{+0.27}_{-0.17}$ anthropogenic events. CRs are mainly seen in reflection off the Antarctic ice sheets, creating a cha…
View article: Observation of Radar Echoes from High-Energy Particle Cascades
Observation of Radar Echoes from High-Energy Particle Cascades Open
We report the observation of radar echoes from the ionization trails of high-energy particle cascades. Data were taken at the SLAC National Accelerator Laboratory, where the full electron beam (∼10^{9} e^{-} at ∼10 GeV/e^{-}) was directed …