A. C. Cummings
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View article: Energy‐Dependent SEP Fe/O Abundances During the May 2024 Superstorm
Energy‐Dependent SEP Fe/O Abundances During the May 2024 Superstorm Open
During mid‐May 2024, active region (AR) 13664 produced a series of M‐ and X‐class flares along with several coronal mass ejections (CMEs) that resulted in exceptionally strong aurora at Earth. This study presents in situ solar energetic pa…
View article: Species-dependent Variability in the Energy Spectra of Intense Solar Energetic Particle Events Observed by PSP/ISʘIS/EPI-Hi/LET
Species-dependent Variability in the Energy Spectra of Intense Solar Energetic Particle Events Observed by PSP/ISʘIS/EPI-Hi/LET Open
Solar energetic particle (SEP) events, comprising electrons, protons, and heavy ions with energies ranging from tens of keV nuc −1 to several GeV nuc −1 , offer critical insights into solar particle acceleration and transport mechanisms. T…
View article: Voyager 1 Observations of Galactic Cosmic-Ray Isotopes in the Very Local Interstellar Medium: Evidence for Primary <sup>2</sup> H and B
Voyager 1 Observations of Galactic Cosmic-Ray Isotopes in the Very Local Interstellar Medium: Evidence for Primary <sup>2</sup> H and B Open
We present the first measurements of the energy spectra of the isotopes of Galactic cosmic rays (GCRs) with nuclear charge Z = 1–14 in the very local interstellar medium (VLISM). We also update our previously published energy spectra of GC…
View article: Radial Dependence of Ion Fluences in the 2023 July 17 Solar Energetic Particle Event from Parker Solar Probe to STEREO and ACE
Radial Dependence of Ion Fluences in the 2023 July 17 Solar Energetic Particle Event from Parker Solar Probe to STEREO and ACE Open
In the latter moments of 2023 July 17, the solar active region (AR) 13363, near the southwestern face of the Sun, was undergoing considerable evolution, which resulted in a significant solar energetic particle (SEP) event measured by Parke…
View article: Longitudinal Dependence of Heavy Ion Composition in the 2021 October 28 Ground Level Enhancement Event
Longitudinal Dependence of Heavy Ion Composition in the 2021 October 28 Ground Level Enhancement Event Open
The 2021 October 28 solar energetic particle (SEP) event was a rare ground level enhancement (GLE) event, where secondary particles from the interactions of SEPs with the Earth’s atmosphere were detected by neutron monitors on the ground. …
View article: Towards detection of ultra high energy neutrinos at the South Pole: Askaryan Radio Array experiment latest results and future prospects”
Towards detection of ultra high energy neutrinos at the South Pole: Askaryan Radio Array experiment latest results and future prospects” Open
The Askaryan Radio Array (ARA) is an in-ice ultrahigh energy (UHE, >10 PeV) neutrino experiment at the South Pole that aims to detect radio emissions from neutrino-induced particle cascades. ARA has five independent stations which together…
View article: On the Acceleration Site of Anomalous Cosmic Rays: Voyager 2 Observations of Their Anisotropy in the Heliosheath
On the Acceleration Site of Anomalous Cosmic Rays: Voyager 2 Observations of Their Anisotropy in the Heliosheath Open
We present the diffusive flow anisotropy vector components for ∼0.5–35 MeV anomalous cosmic-ray (ACR) protons observed during Voyager 2 roll maneuvers for the magnetometer instrument in the inner heliosheath. The diffusive flow results are…
View article: Progress towards an array-wide diffuse UHE neutrino search with the Askaryan Radio Array
Progress towards an array-wide diffuse UHE neutrino search with the Askaryan Radio Array Open
The Askaryan Radio Array (ARA) is an in-ice ultrahigh energy (UHE) neutrino experiment at the South Pole. ARA aims to detect the radio emissions from neutrino-induced particle showers using in-ice clusters of antennas buried ${\\sim}200$ m…
View article: The Low Frequency Instrument for the Payload for Ultrahigh Energy Observations (PUEO)
The Low Frequency Instrument for the Payload for Ultrahigh Energy Observations (PUEO) Open
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 a fixed gondola and a Low Fr…
View article: Design of the PUEO Payload
Design of the PUEO Payload Open
The primary science goals of the Payload for Ultrahigh Energy Observations (PUEO) are testing models of both candidate sources of ultrahigh-energy neutrinos (UHEN) and the propagation of ultrahigh-energy cosmic rays. PUEO is a balloon-born…
View article: Effects of Biaxial Birefringence on Polarization Reconstruction for the Askaryan Radio Array
Effects of Biaxial Birefringence on Polarization Reconstruction for the Askaryan Radio Array Open
Ultra-high energy (UHE) neutrinos, with energies exceeding $10^{17}$ eV, offer unique insights into cosmic accelerators and the origins of ultra-high energy cosmic rays. The Askaryan Radio Array (ARA) is designed to detect UHE neutrinos by…
View article: A search for the ultra high energy neutrinos with a low threshold phased array trigger system of the Askaryan Radio Array
A search for the ultra high energy neutrinos with a low threshold phased array trigger system of the Askaryan Radio Array Open
The Askaryan Radio Array (ARA) is an in-ice ultra high energy (UHE, $>10$ PeV) neutrino experiment at the South Pole that aims to detect UHE neutrino-induced radio emission in ice. ARA consists of five independent stations each consisting …
View article: Composition Variation of the 2023 May 16 Solar Energetic Particle Event Observed by SolO and PSP
Composition Variation of the 2023 May 16 Solar Energetic Particle Event Observed by SolO and PSP Open
In this study, we employ the combined charged particle measurements from Integrated Science Investigation of the Sun on board the Parker Solar Probe (PSP) and Energetic Particle Detector on board the Solar Orbiter (SolO) to study the compo…
View article: Composition variation of the May 16 2023 Solar Energetic Particle Event observed by Solar Orbiter and Parker Solar Probe
Composition variation of the May 16 2023 Solar Energetic Particle Event observed by Solar Orbiter and Parker Solar Probe Open
In this study, we employ the combined charged particle measurements from Integrated Science Investigation of the Sun (\ISOIS) onboard the Parker Solar Probe (PSP) and Energetic Particle Detector (EPD) onboard the Solar Orbiter (SolO) to st…
View article: Observations of the 2022 September 5 Solar Energetic Particle Event at 15 Solar Radii
Observations of the 2022 September 5 Solar Energetic Particle Event at 15 Solar Radii Open
On 2022 September 5, Parker Solar Probe (Parker) observed a large solar energetic particle (SEP) event at the unprecedented distance of only 15 R S from the Sun. The observations from the Integrated Science Investigation of the Sun (IS⊙IS)…
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: 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: Cosmic Rays Measurements on an Interstellar Probe: A Bold Approach to Concluding the Second Century of Space Aged Science
Cosmic Rays Measurements on an Interstellar Probe: A Bold Approach to Concluding the Second Century of Space Aged Science Open
Whitepaper #169 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research. Additional topics: outer heliosphere; space-based missions/projects; emerging opportunities.
View article: Searching for Askaryan Emission from Neutrinos with the Payload for Ultrahigh Energy Observations (PUEO)
Searching for Askaryan Emission from Neutrinos with the Payload for Ultrahigh Energy Observations (PUEO) Open
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 a broadband interferometric radio telescope pointing down at the ice…