proton distribution
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2021 ◽  
Vol 5 (9) ◽  
Author(s):  
Ivan A. Zaluzhnyy ◽  
Peter O. Sprau ◽  
Richard Tran ◽  
Qi Wang ◽  
Hai-Tian Zhang ◽  
...  
Keyword(s):  
X Rays ◽  


2021 ◽  
Author(s):  
Shangchun Teng ◽  
Nigang Liu ◽  
Qianli Ma ◽  
Xin Tao ◽  
Wen Li

<p>Magnetosonic (MS) waves and electromagnetic ion cyclotron (EMIC) waves are two important plasma wave modes in the magnetosphere. Previous simulations have shown that both waves could be generated by a ring-like proton distribution, while direct observational evidence has yet to be reported. Here, we present simultaneous observations of MS and EMIC waves and a detailed case analysis. The linear growth rates estimated for both waves are in good agreement with the observed wave frequency spectra. The measured proton distribution evolution is also compared with the simulation results, providing direct observational evidence for the previous theoretical prediction that anisotropic ring-like proton distributions could excite MS and EMIC waves simultaneously. Our findings are crucial for understanding the generation mechanisms of and relation between MS and EMIC waves and for evaluating their combined effects on energetic electron and ion dynamics. </p>



2021 ◽  
Vol 252 (2) ◽  
pp. 26
Author(s):  
E. J. Zirnstein ◽  
M. A. Dayeh ◽  
J. Heerikhuisen ◽  
D. J. McComas ◽  
P. Swaczyna


2021 ◽  
Author(s):  
Ling-I Hung ◽  
Tsung-Hsiu Hsieh ◽  
Jhao-Yang Syu ◽  
Pei-Lin Chen ◽  
Chia-Her Lin ◽  
...  

A novel titanium(III) phosphite with intriguing polymorphism and solid-state proton-coupled electron transfer (PCET) oxidation is presented. The polymorphs show structure-dependent PCET reactivity, interpretable by proton distribution in channels. Combined with...





2018 ◽  
Vol 865 (2) ◽  
pp. 150 ◽  
Author(s):  
E. J. Zirnstein ◽  
R. Kumar ◽  
J. Heerikhuisen ◽  
D. J. McComas ◽  
A. Galli


2018 ◽  
Vol 118 ◽  
pp. 997-1003 ◽  
Author(s):  
Yejun Wu ◽  
Daming Fan ◽  
Yishu Gao ◽  
Shenyan Ma ◽  
Bowen Yan ◽  
...  


2018 ◽  
Vol 20 (6) ◽  
pp. 4317-4328 ◽  
Author(s):  
Lucienne Buannic ◽  
Luke Sperrin ◽  
Riza Dervişoğlu ◽  
Frédéric Blanc ◽  
Clare P. Grey

The complex local protonic distribution and proton–dopant interaction in Sc-substituted BaZrO3 was investigated by coupling solid state NMR experiments to first principle calculations.



2017 ◽  
Vol 83 (1) ◽  
Author(s):  
O. Pezzi ◽  
T. N. Parashar ◽  
S. Servidio ◽  
F. Valentini ◽  
C. L. Vásconez ◽  
...  

The analysis of the Parker–Moffatt problem, recently revisited in Pezzi et al. (Astrophys. J., vol. 834, 2017, p. 166), is here extended by including Hall magnetohydrodynamics and two hybrid kinetic Vlasov–Maxwell numerical models. The presence of dispersive and kinetic features is studied in detail and a comparison between the two kinetic codes is also reported. Focus on the presence of non-Maxwellian signatures shows that – during the collision – regions characterized by strong temperature anisotropy are recovered and the proton distribution function displays a beam along the direction of the magnetic field, similar to some recent observations of the solar wind.



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