Results 41 to 50 of about 114,782 (336)

Near-Earth injection of MeV electrons associated with intense dipolarization electric fields: Van Allen Probes observations. [PDF]

, 2015
Substorms generally inject tens to hundreds of keV electrons, but intense substorm electric fields have been shown to inject MeV electrons as well. An intriguing question is whether such MeVelectron injections can populate the outer radiation belt.
Angelopoulos, Vassilis, Baker, Daniel N, Blake, J Bernard, Breneman, Aaron, Cattell, Cynthia A, Chen, Lunjin, Claudepierre, Seth, Dai, Lei, Duan, Suping, Fennell, Joseph, Fruehauff, Dennis, Funsten, Herbert O, He, Zhaohai, Kletzing, Craig, Li, Xinlin, Malaspina, David, Reeves, Geoffrey D, Spence, Harlan E, Su, Zhenpeng, Tang, Xiangwei, Tao, Xin, Thaller, Scott, Turner, Drew L, Wang, Chi, Wygant, John R   +24 more
core   +2 more sources

Quantifying the radiation belt seed population in the 17 March 2013 electron acceleration event [PDF]

, 2014
We present phase space density (PSD) observations using data from the Magnetic Electron Ion Spectrometer instrument on the Van Allen Probes for the 17 March 2013 electron acceleration event.
Baker, D. N., Blake, J. B., Boyd, A. J., Claudepierre, S., Fennell, Joseph F., Reeves, Geoffrey, Spence, Harlan E., Turner, D. L.   +7 more
core   +2 more sources

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Pc5 Magnetic Pulsations during the Outer Electron Radiation Belt

International Journal of Technology, 2014
Since the discovery of the radiation belt decades ago, there still remain some fundamental questions as to which one is the mechanism responsible for the acceleration of electrons. Ground-based Pc5 magnetic pulsation during the process of increasing of 2-
L. Muhammad Musafar K, Triyanta, W. Sugitomo, A. Yoshikawa, T. Uozumi   +4 more
doaj   +1 more source

Radial Transport Versus Local Acceleration: The Long‐Standing Debate

Earth and Space Science, 2022
On 28 July 2021, within the Geospace Environment Modeling Virtual Summer Workshop, a joint panel discussion organized by the “System Understanding of Radiation Belt Particle Dynamics through Multi‐spacecraft and Ground‐based Observations and Modeling ...
Alexander Y. Drozdov, Lauren W. Blum, Michael Hartinger, Hong Zhao, Solène Lejosne, Mary K. Hudson, Hayley J. Allison, Louis Ozeke, Allison N. Jaynes   +8 more
doaj   +1 more source

Intense duskside lower band chorus waves observed by Van Allen Probes: Generation and potential acceleration effect on radiation belt electrons [PDF]

, 2014
Local acceleration driven by whistler mode chorus waves largely accounts for the enhancement of radiation belt relativistic electron fluxes, whose favored region is usually considered to be the plasmatrough with magnetic local time approximately from ...
Baker, D. N., Blake, J. B., Funsten, H. O., He, Zhaoguo, Hospodarsky, G. B., Kletzing, C A., Kurth, W. S., Liu, Rui, Reeves, Geoffrey, Shen, Chao, Shen, Chenglong, Spence, Harlan E., Su, Zhenpeng, Wang, C. B., Wang, Shui, Wang, Yuming, Wygant, J. R., Xiao, Fuliang, Zhang, Min, Zheng, Huinan, Zhu, Hui   +20 more
core   +2 more sources

Radiation‐Resistant Aluminum Alloy for Space Missions in the Extreme Environment of the Solar System

Advanced Materials, EarlyView.
A novel ultrafine‐grained aluminum crossover alloy exhibits unprecedented radiation resistance and mechanical stability under extreme irradiation doses up to 100 dpa. The exceptional resilience arises from thermodynamically stable T‐phase precipitates, enabling lightweight structural materials for next‐generation spacecraft and extraterrestrial ...
Patrick D. Willenshofer, Matheus A. Tunes, Hi T. Vo, Lukas Stemper, Markus Alfreider, Oliver Renk, Graeme Greaves, Daniel Kiener, Peter J. Uggowitzer, Stefan Pogatscher   +9 more
wiley   +1 more source

Competing source and loss mechanisms due to wave-particle interactions in Earth’s outer radiation belt during the 30 September to 3 October 2012 geomagnetic storm [PDF]

, 2014
Drastic variations of Earth’s outer radiation belt electrons ultimately result from various competing source, loss, and transport processes, to which wave-particle interactions are critically important.
Angelopoulos, V., Baker, D. N., Blake, J. B., Bortnik, J., Claudepierre, S., Henderson, M. G., Huang, Chia-Lin L., Kletzing, C A., Kurth, W. S., Li, W., Ma, Q., Mann, I. R., Morley, S. K., Ni, B., Reeves, Geoffrey, Rodriguez, J. V., Spence, Harlan E., Thorne, R. M., Turner, D. L., Usanova, M.   +19 more
core   +3 more sources

Performance Constraints of All‐Perovskite Tandem Solar Cells in Low‐Intensity, Low‐Temperature Environments

Advanced Materials, EarlyView.
All‐perovskite tandem solar cells are evaluated under low‐intensity and low‐temperature (LILT) conditions relevant to space environments. Distinct loss regimes emerge, where weaker entropic mixing causes halide segragation below ≈240 K going along with a strong current imbalance, while poor electron transport in C60 dominates.
Sercan Ozen, Etienne Beier, Francisco Peña‐Camargo, Jarla Thiesbrummel, Gianluca Boccarella, Paria Forozi Sowmeeh, Martin Stolterfoht, Dieter Neher, Kai Oliver Brinkmann, Thomas Riedl, Felix Lang   +10 more
wiley   +1 more source

Ecosystem‐Centered Robot Design: Toward Ecoresorbable Sustainability Robots (ESRs)

Advanced Science, EarlyView.
Robots exploring natural ecosystems can support monitoring and conservation, but must adopt ecosystem‐centered design to avoid pollution, waste, and damage. This review proposes guidelines for co‐designing ecoresorbable sustainability robots (ESRs), uniting materials, robotics, and ecological contexts in a single framework.
Tülin Yılmaz Nayır, Yuan Fang, Consuelo Contreras, Andrew K. Schulz, Florian Hartmann   +4 more
wiley   +1 more source