Results 11 to 20 of about 66 (64)

The Promise of Solid Lubricants for a Sustainable Future. [PDF]

Adv Mater
Lubricants are vital for technology, saving energy and resources. The industry seeks sustainable solutions beyond fossil fuels. Solid lubricants offer extremely low friction and reduce environmental impact, especially in harsh conditions. Can these solids truly replace liquid lubricants, or are they limited to extreme applications?
Grützmacher PG, Voevodin AA, Korényi-Both A, Righi MC, DellaCorte C, Bagcivan N, Erdemir A, Gachot C.   +7 more
europepmc   +2 more sources

Modeling Ganymede's Surface Charging in Preparation for the JUICE Mission

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract The European Space Agency's (ESA) JUICE mission (JUpiter ICy moons Explorer) is en route to the Jovian system to characterize Ganymede's subsurface ocean. Determining the ocean's conductivity and depth requires precise measurements of its induced magnetic field at the position of JUICE.
Betty Pei‐Chun Tsai, Elias Roussos, Ronan Modolo, Mika K. G. Holmberg, Xianzhe Jia, Tom Nordheim, Sachin Alexander Reddy, Norbert Krupp, Markus Fränz, Yasuhito Narita, Christina Plainaki   +10 more
wiley   +1 more source

The High Plasma Density Observed Along the PJ57 Juno Flyby of Io Implies the Presence of a Dense Atomic Corona

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract On December 2023, the Juno spacecraft made a flyby of Io above the northern hemisphere at a closest approach (CA) altitude of ∼1,500 km (PJ57). The Juno/Waves and Radio‐occultation measurements showed a surprising large electron density ∼28,000 cm−3 near closest approach.
V. Dols, F. Bagenal
wiley   +1 more source

Electron Energy Spectra in Jupiter's Radiation Belts From Juno‐JEDI

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract Radiation transport simulations of the Jupiter Energetic‐particle Detector Instrument (JEDI) onboard the Juno spacecraft were performed to understand its response to high energy electrons. Determination of the JEDI response function is the first rigorous effort of its kind and was used to reconstruct the true electron foreground, extending the
B. X. Zhu, I. Jun, P. Kollmann, C. Paranicas   +3 more
wiley   +1 more source

Energetic Ion Losses Observed During Juno's Close Encounter With Europa

Geophysical Research Letters, Volume 52, Issue 21, 16 November 2025.
Abstract We present energetic ion observations made by Juno during its close Europa flyby on 29 September 2022. These data show significant reductions in the ion intensities occurring in the moon's geometric wake region. The most significant losses occur for locally mirroring ions with gyrophases on the anti‐Jovian facing side of the wake.
G. Clark, B. H. Mauk, C. Paranicas, H. T. Smith, J. R. Szalay, P. Kollmann, F. Allegrini, R. W. Ebert, N. Krupp, L. H. Regoli, T. A. Nordheim, H. L. F. Huybrighs, S. Bolton   +12 more
wiley   +1 more source

Flux Tube Properties and Interchange Instabilities in Jupiter's Middle Magnetosphere

Geophysical Research Letters, Volume 52, Issue 21, 16 November 2025.
Abstract In Jupiter's magnetosphere, the outward transport of Io‐genic plasma and the planetward injection of energetic particles are facilitated by flux tube interchange motion driven by centrifugal instabilities. Flux tube content and entropy are two competing key quantities that determine the behavior of the system.
Jian‐Zhao Wang, Fran Bagenal, Simon Wing, Peter A. Delamere, Xuanye Ma, Robert J. Wilson, Robert W. Ebert, Philip W. Valek, Frederic Allegrini, Vincent Dols, Licia C. Ray, Chynna Spitler, George Clark, Barry H. Mauk   +13 more
wiley   +1 more source

Energetic Proton Dropouts During the Juno Flyby of Europa Strongly Depend on Magnetic Field Perturbations

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract During Juno's only flyby of Europa, the Jupiter Energetic Particle Detector Instrument (JEDI) measured complex dropouts in the energetic ion flux in Europa's wake. We investigate the causes of these dropouts, focusing specifically on energetic protons of ∼100 ${\sim} 100$ keV and ∼1 ${\sim} 1$ MeV, using back‐tracking particle simulations, a ...
H. L. F. Huybrighs, S. Cervantes, P. Kollmann, C. Paranicas, C. F. Bowers, X. Cao, M. K. G. Holmberg, C. M. Jackman, S. Brophy Lee, A. Blöcker, E. Marchisio   +10 more
wiley   +1 more source

Radial Evolution of Electron Pitch Angle Distributions in the Inner Part of Jovian Magnetosphere

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract Previous observations in Jupiter's magnetosphere have revealed that the pitch‐angle distributions (PADs) of energetic (>∼102 ${ >} \sim 1{0}^{2}$ keV) electrons transition from pancake to field‐aligned distributions from ∼ ${\sim} $10 to 20 Jupiter radii.
Z.‐Y. Liu, N. André, J. Rabia, M. Blanc, Y. Sarkango, J. R. Szalay, F. Allegrini, R. W. Ebert, S. Bolton, J. E. P. Connerney   +9 more
wiley   +1 more source

Cold and Hot Electron Populations Observed by Juno‐JADE in the Jovian Magnetodisc

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract Despite their importance to a variety of plasma processes in Jupiter's magnetosphere, properties of the thermal and suprathermal electrons have been sparsely reported in past literature. To address this gap, we used data from Juno's Jovian Auroral Distributions Experiment Electron sensors to survey electron properties in Jupiter's magnetodisc ...
Y. Sarkango, J. R. Szalay, A. R. Poppe, Q. Nénon, Z. Y. Liu, F. Allegrini, D. J. McComas, R. W. Ebert, P. Kollmann, G. Livadiotis, L. Y. Khoo, N. André, J.‐Z. Wang, F. Bagenal, S. Schlegel, J. Saur, W. S. Kurth, A. H. Sulaiman   +17 more
wiley   +1 more source

Injections of Multi‐MeV Electrons in the Magnetosphere of Jupiter

Journal of Geophysical Research: Space Physics, Volume 130, Issue 9, September 2025.
Abstract Energetic particle injections provide a means for fast inward radial transport and adiabatic acceleration of electrons in the magnetosphere of Jupiter. Furthermore, enhanced whistler‐mode wave activity during injections can further accelerate electrons to MeV energy.
Q. Nénon, U. Laffitau, J. Rabia
wiley   +1 more source