A5014675632- Ionosphere and magnetosphere dynamics
- Geomagnetism and Paleomagnetism Studies
- Solar and Space Plasma Dynamics
- Earthquake Detection and Analysis
- Mosquito-borne diseases and control
- Insect Resistance and Genetics
- Insect Pest Control Strategies
- Gyrotron and Vacuum Electronics Research
- Plasma Diagnostics and Applications
- Pulsed Power Technology Applications
- Particle accelerators and beam dynamics
- Insect behavior and control techniques
- Astro and Planetary Science
- Plant Surface Properties and Treatments
- Geophysical and Geoelectrical Methods
- Plasma Applications and Diagnostics
- Molecular Communication and Nanonetworks
- Forensic Entomology and Diptera Studies
- Inertial Sensor and Navigation
- Geophysics and Gravity Measurements
- Magnetic confinement fusion research
- NMR spectroscopy and applications
- 3D Printing in Biomedical Research
- Horticultural and Viticultural Research
- Microfluidic and Bio-sensing Technologies
Los Alamos National Laboratory
2023-2024
University of New Hampshire
2018-2023
University of New Hampshire at Manchester
2021-2022
University of Michigan
2022
Johns Hopkins University Applied Physics Laboratory
2022
University of Arkansas at Fayetteville
2020
University of Warwick
1995
Space Research Institute
1973
Abstract Thin current sheets (TCSs) have been postulated to be a necessary precondition for reconnection onset. Magnetic X‐lines in the magnetotail observed more common duskward of midnight. We take advantage MMS tetrahedral formation during 2017–2020 tail seasons calculate thickness cross‐tail neutral sheet relative ion gyroradius. While similar technique was applied Cluster data, over broader range radial distances has not robustly explored before this study. compare our analysis recent...
Abstract Reconnection in the magnetotail occurs along so‐called X‐lines, where magnetic field lines tear and detach from plasma on microscopic spatial scales (comparable to particle gyroradii). In 2017–2020, Magnetospheric MultiScale (MMS) mission detected X‐lines enabling their investigation local scales. However, global structure evolution of these critical for understanding formation total energy conversion mechanisms, remained virtually unknown because intrinsically nature observations...
Abstract We analyze the local dynamics of magnetotail reconnection onset using Magnetospheric Multiscale (MMS) data. In conjunction with MMS, macroscopic this event were captured by a number other ground and space‐based observatories, as is reported in companion paper. find that characterized rapid thinning cross‐tail current sheet below ion inertial scale, accompanied growth flapping waves subsequent electron tearing. Multiple kinetic‐scale magnetic islands detected coincident an initially...
Abstract We present a numerical algorithm to identify ion diffusion regions (IDRs) in the geomagnetic tail and test its applicability. use five criteria applied three stages. (i) correlated reversals (within 90 s) of V x B z (at least 2 nT about 0; geocentric solar magnetospheric coordinates); (ii) detection Hall electric magnetic field signatures; (iii) strong (≥10 mV/m) fields. While no criterion alone is necessary sufficient, approach does provide robust, if conservative, list IDRs. data...
During the process of magnetic reconnection, converging fields transfer some stored energy into plasma energy. Simulations and spacecraft data suggest that at edges electron diffusion region, “generators” can form where local electromagnetic field gains from plasma. We use a 2D Particle-in-cell (PIC) simulation Magnetospheric Multiscale (MMS) to investigate dynamics budget these generators. PIC results generators population begins remagnetize, while still not being fully frozen in fields....
Abstract On 2020 April 19–20, a solar ejection was seen by spacecraft in radial alignment that included Solar Orbiter and Wind. The contained magnetic flux rope where field plasma parameters were well correlated between spacecraft. This structure is called an “unperturbed rope” (UMFR). Ahead of the UMFR portion (not sheath) referred to as “upstream” (US). We focus on US inquire why correlation so much weaker there. Specifically, we analyze data collected at 0.81 au Wind L1. show plausible...
Abstract We analyze data returned by the Magnetospheric Multiscale mission (MMS) constellation during a rapid (∼1.5 s) traversal of flapping and reconnecting current sheet (CS) in near‐Earth magnetotail (X ∼−20 R E ). The CS was highly tilted, with its normal pointing strongly duskward. Its extreme thinness confirmed curvature analysis magnetic field lines. event associated guide 8% components. From pitch angle distributions low‐energy electrons we infer crossing earthward X‐line. Traveling...
Abstract We analyze a magnetotail reconnection onset event on 3 July 2017 that was observed under otherwise quiescent magnetospheric conditions by fortuitous conjunction of six space and ground‐based observatories. The study investigates the large‐scale coupling solar wind–magnetosphere system precipitated reconnection, focusing processes thinned stretched cross‐tail current layer in absence significant flux loading during 2‐hr‐long preconditioning phase. It is demonstrated with data (a)...
The geomagnetic storm that occurred on April 23-24, 2023 was the largest such event in nearly last two decades. As solar cycle begins to increase towards maximum these events will with frequency and strength. observed by FalconSEED sensor mounted on- board STPSat-6 geosynchronous orbit (GEO). Observations were made of injection energetic electrons inner magnetosphere enhancement electron population GEO. Falcon Solid‐state Energetic Electron Detector (FalconSEED) is an charged particle has...
The decay of intensity in the Lewis-Rayleigh afterglow is attributable to two main processes: (i) recombination N atoms form excited N2 (the reaction which produces afterglow), (ii) loss vessel walls. Initially first process important, but later wall-loss appears predominate.
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Geophysical Research Letters. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Global structure of magnetotail reconnection revealed mining space magnetometer dataAuthorsGrant K.StephensiDMikhail I.SitnoviDRobert SWeigeliDDrew L.TurnerNikolai...
Abstract In this paper we report on a sequence of large‐amplitude Alfvénic fluctuations terminating in field and flow discontinuity their effects electromagnetic fields plasmas the near‐magnetopause magnetosheath. An arc‐polarized structure magnetic was observed by Time History Events Macroscale Interactions during Substorms‐C solar wind, indicative nonlinear Alfvén waves. It ends with combined tangential discontinuity/vortex sheet, which is strongly inclined to ecliptic plane at there sharp...
The Falcon Solid-state Energetic Electron Detector (SEED) is an energetic charged particle sensor that has been developed at the United States Air Force Academy to monitor electron flux across energy range of 14 145 keV in geosynchronous orbit (GEO). This complement ongoing efforts by Research Laboratory (AFRL) advance a comprehensive space environment suite, Compact Environmental Anomaly Sensor (CEASE3), for anomaly resolution. SEED instrument designed demonstrate ability develop CubeSat...
Keywords RAILWAYS, DERAILMENTS, CURVES, CAUSES, TRANSITION, CENTRIFUGAL, FORCES, LOADS, TRAINS, SPRINGS, WHEELS, ROTATION, CURVATURE... Show All