Reduced Low Dose Rate Sensitivity and its Mechanism in Bipolar Junction TransistorsIt is surprising that only an enhanced low-dose-rate sensitivity (ELDRS), but not its contrariety, a reduced low-dose-rate sensitivity (RLDRS), is experimentally observed in bipolar junction…Xiao-Long Feng, Zi-Bo Wang, Yang Liu et al.·Jul 3, 2017SaveLearn
Catalogue of 55-80 MeV solar proton events extending through solar cycles 23 and 24We present a new catalogue of solar energetic particle events near the Earth, covering solar cycle 23 and the majority of solar cycle 24 (1996-2016), based on the 55-80 MeV proton intensity data…Miikka Paassilta, Osku Raukunen, Rami Vainio et al.·Jul 3, 2017SaveLearn
Semi-Analytical Perturbative Approaches to Third Body Resonant TrajectoriesIn the framework of multi-body dynamics, successive encounters with a third body, even if well outside of its sphere of influence, can noticeably alter the trajectory of a spacecraft. Examples of…J. P. Sanchez, C. Colombo, E. M. Alessi·Jun 29, 2017SaveLearn
Tangential deflection and formation of counterstreaming flows at the impact of a plasma jet on a tangential discontinuityIn this letter we report three-dimensional particle-in-cell simulations of the interaction between a nonpenetrable magnetosheath jet and the magnetopause, for northward interplanetary magnetic field.…G. Voitcu, M. Echim·Jun 29, 2017SaveLearn
Electron crescent distributions as a manifestation of diamagnetic drift in an electron scale current sheetWe report Magnetospheric Multiscale observations of electron pressure gradient electric fields near a magnetic reconnection diffusion region using a new technique for extracting 7.5 ms electron…A. C. Rager, J. C. Dorelli, D. J. Gershman et al.·Jun 26, 2017SaveLearn
The effect of a guide field on local energy conversion during asymmetric magnetic reconnection: MMS observationsWe compare case studies of Magnetospheric Multiscale (MMS)-observed magnetopause electron diffusion regions (EDRs) to determine how the rate of work done by the electric field,…Kevin Genestreti, Jim Burch, Paul Cassak et al.·Jun 26, 2017SaveLearn
Electromagnetic forces on a relativistic spacecraft in the interstellar mediumA relativistic spacecraft of the type envisioned by the Breakthrough Starshot initiative will inevitably get charged through collisions with interstellar particles and UV photons. Interstellar…Thiem Hoang, Abraham Loeb·Jun 25, 2017SaveLearn
Early propagation of energetic particles across the mean field in turbulent plasmasPropagation of energetic particles across the mean field direction in turbulent magnetic fields is often described as spatial diffusion. Recently, it has been suggested that initially the particles…T. Laitinen, S. Dalla, D. Marriott·Jun 20, 2017SaveLearn
Propagation of Solar Energetic Particles in Three-dimensional Interplanetary Magnetic Fields: Radial Dependence of Peak IntensitiesA functional form Imax(R)=kR-α, where R is the radial distance of spacecraft, was usually used to model the radial dependence of peak intensities Imax(R) of solar energetic particles (SEPs).…H. -Q. He, G. Zhou, W. Wan·Jun 16, 2017SaveLearn
Fermi acceleration of electrons inside foreshock transient coresForeshock transients upstream of Earth's bow shock have been recently observed to accelerate electrons to many times their thermal energy. How such acceleration occurs is unknown, however. Using…Terry Z. Liu, San Lu, Vassilis Angelopoulos et al.·Jun 15, 2017SaveLearn
Statistical study of particle acceleration in the core of foreshock transientsSeveral types of foreshock transients upstream of Earth's bow shock possessing a tenuous, hot core have been observed and simulated. Because of the low dynamic pressure in their cores, these…Terry Z. Liu, Vassilis Angelopoulos, Heli Hietala et al.·Jun 15, 2017SaveLearn
Exploring the Statistics of Magnetic Reconnection X-points in Kinetic Particle-in-Cell (PIC) TurbulenceMagnetic reconnection is a ubiquitous phenomenon in turbulent plasmas. It is an important part of the turbulent dynamics and heating of space and astrophysical plasmas. We examine the statistics of…Colby C. Haggerty, Tulasi N. Parashar, William H. Matthaeus et al.·Jun 15, 2017SaveLearn
Modeling Transport of Energetic Particles in Corotating Interaction Region -- A case StudyWe investigate energetic particle transport in Corotating Interaction Regions (CIRs) through a case study. The CIR event we study occurred on 2008 February 08 and was observed by both the…Lulu Zhao, Gang Li, R. W. Ebert et al.·Jun 14, 2017SaveLearn
Modeling Shocks Detected by Voyager 1 in the Local Interstellar MediumThe magnetometer (MAG) on Voyager 1 (V1) has been sampling the interstellar magnetic field (ISMF) since August 2012. The V1 MAG observations have shown draped ISMF in the very local interstellar…Tae K. Kim, Nikolai V. Pogorelov, Leonard F. Burlaga·Jun 13, 2017SaveLearn
Electron scale structures and magnetic reconnection signatures in the turbulent magnetosheathCollisionless space plasma turbulence can generate reconnecting thin current sheets as suggested by recent results of numerical magnetohydrodynamic simulations. The MMS mission provides the first…E. Yordanova, Z. Vörös, A. Varsani et al.·Jun 13, 2017SaveLearn
Kinetic Theory and Fast Wind Observations of the Electron StrahlWe develop a model for the strahl population in the solar wind -- a narrow, low-density and high-energy electron beam centered on the magnetic field direction. Our model is based on the solution of…Konstantinos Horaites, Stanislav Boldyrev, Lynn B. Wilson et al.·Jun 12, 2017SaveLearn
Electric propulsion reliability: statistical analysis of on-orbit anomalies and comparative analysis of electric versus chemical propulsion failure ratesWith a few hundred spacecraft launched to date with electric propulsion (EP), it is possible to conduct an epidemiological study of EP on orbit reliability. The first objective of the present work…Joseph Homer Saleh, Fan Geng, Michelle Ku et al.·Jun 9, 2017SaveLearn
The Intensities of Cosmic Ray H and He Nuclei at ~250 MeV/nuc Measured by Voyagers 1 and 2 - Using these Intensities to Determine the Solar Modulation Parameter in the Inner Heliosphere and the Heliosheath Over a 40 Year Time PeriodWe have determined the solar modulation potential, phi, vs. time that is observed at Voyager 1 and 2 from measurements of the H and He nuclei intensities at a common energy of 250 MeVnuc. The H…W. R. Webber, E. C. Stone, A. C. Cummings et al.·Jun 8, 2017SaveLearn
Scale size-dependent characteristics of the nightside auroraWe have determined the spatiotemporal characteristics of the magnetosphere-ionosphere (M-I) coupling using auroral imaging. Observations at fixed positions for an extended period of time are provided…B. K. Humberset, J. W. Gjerloev, M. Samara et al.·Jun 6, 2017SaveLearn
The uncertainty of local background magnetic field orientation in anisotropic plasma turbulenceIn order to resolve and characterize anisotropy in turbulent plasma flows a proper estimation of the background magnetic field is crucially important. Various approaches to calculate the background…Felix Gerick, Joachim Saur, Michael von Papen·Jun 4, 2017SaveLearn
Muon Excess at Sea Level during the Progress of a Geomagnetic Storm and High Speed Stream Impact Near the Time of Eath's Heliospheric Sheet CrossingIn this article we present results of the study on the association between the muon flux variation at ground level, registered by the New-Tupi muon telescopes ($220…C. R. A. Augusto, C. E. Navia, M. N. de Oliveira et al.·Jun 1, 2017SaveLearn
The impact of energetic electron precipitation on mesospheric hydroxyl during a year of solar minimumIn 2008 a sequence of geomagnetic storms occurred triggered by high-speed solar wind streams from coronal holes. Improved estimates of precipitating fluxes of energetic electrons are derived from…Annet Eva Zawedde, Hilde Nesse Tyssøy, Robert Hibbins et al.·Jun 1, 2017SaveLearn
On the contribution of thermal excitation to the total 630.0 nm emissions in the northern cusp ionosphereDirect impact excitation by precipitating electrons is believed to be the main source of 630.0 nm emissions in the cusp ionosphere. However, this paper investigates a different source, 630.0…Norah Kaggwa Kwagala, Kjellmar Oksavik, Dag A. Lorentzen et al.·Jun 1, 2017SaveLearn
A reconstruction method of electron density distribution in the equatorial region of magnetosphereA method for the estimation of electron density from the ratio of the wave magnetic and electric field amplitude of whistler waves is developed. Near the geomagnetic equator, whistler wave normals…Vitlii Shastun, Oleksiy Agapitov·May 31, 2017SaveLearn
Towards a greater understanding of the reduction of drift coefficients in the presence of turbulenceDrift effects play a significant role in the transport of charged particles in the heliosphere. A turbulent magnetic field is also known to reduce the effects of particle drifts. The exact nature of…Eugene Engelbrecht, Du Toit Strauss, Kobus le Roux et al.·May 25, 2017SaveLearn