Erratum: “Electromagnetic Waves near the Proton Cyclotron Frequency: STEREO Observations” (2014, ApJ, 786, 123)

2017 ◽  
Vol 847 (1) ◽  
pp. 82
Author(s):  
L. K. Jian ◽  
H. Y. Wei ◽  
C. T. Russell ◽  
J. G. Luhmann ◽  
B. Klecker ◽  
...  
Keyword(s):  
Electromagnetic Waves ◽  
Cyclotron Frequency ◽  
Proton Cyclotron

Using Compressibility and Electric Field to Characterize Circularly-Polarized Waves Near the Proton Cyclotron Frequency Observed by Solar Orbiter

2021 ◽  
Author(s):  
Yuri Khotyaintsev ◽  
Daniel B Graham ◽  
Konrad Steinvall ◽  
Andris Vaivads ◽  
Milan Maksimovic ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Solar Wind ◽  
Electric Field ◽  
Electromagnetic Waves ◽  
Cyclotron Frequency ◽  
Density Fluctuations ◽  
Background Magnetic Field ◽  
The Waves ◽  
The Magnetic Field ◽  
Proton Cyclotron

<p>We report Solar Orbiter observations of electromagnetic waves near the proton cyclotron frequency during the first perihelion. The waves have polarization close to circular and have wave vectors closely aligned with the background magnetic field. Such waves are potentially important for heating of the solar wind as their frequency and polarization allows effective energy exchange with solar wind protons. The Radio and Plasma Waves (RPW) instrument provides a high-cadence measurement of plasma density and electric field which we use together with the magnetic field measured by MAG to characterize these waves. In particular we compute the compressibility and the phase between the density fluctuations and the parallel component of the magnetic field, and show that these have a distinct behavior for the waves compared to the Alfvénic turbulence. We compare the observations to multi-fluid plasma dispersion and identify the waves modes corresponding to the observed waves. We discuss the importance of the waves for solar wind heating.</p>

scholarly journals Identification of the Nature of Electromagnetic Waves near the Proton-cyclotron Frequency in Solar-terrestrial Plasmas

2020 ◽  
Vol 890 (1) ◽  
pp. 17 ◽  
Author(s):  
Jinsong Zhao ◽  
Tieyan Wang ◽  
Daniel B. Graham ◽  
Jiansen He ◽  
Wen Liu ◽  
...  
Keyword(s):  
Electromagnetic Waves ◽  
Cyclotron Frequency ◽  
Proton Cyclotron

Rayleigh surface waves along the boundary between a plasma and a metallic screen

1993 ◽  
Vol 49 (2) ◽  
pp. 227-235 ◽  
Author(s):  
S. T. Ivanov ◽  
K. M. Ivanova ◽  
E. G. Alexov
Keyword(s):  
Wave Propagation ◽  
Electromagnetic Wave ◽  
Surface Waves ◽  
Electromagnetic Waves ◽  
Electromagnetic Wave Propagation ◽  
Cyclotron Frequency ◽  
Plasma Frequency ◽  
Magnetoactive Plasma ◽  
Rayleigh Surface Waves ◽  
The Waves

Electromagnetic wave propagation along the interface between a magnetoactive plasma and a metallic screen is investigated analytically and numerically. It is shown that the waves have a Rayleigh character: they are superpositions of two partial waves. It is concluded that electromagnetic waves propagate only at frequencies lower than min (ωp, ωc), where ωpis the plasma frequency and ωcis the cyclotron frequency. The field topology is found, and the physical character of the waves is discussed.

The magnetic moment of the proton, I. The value in nuclear magnetons

1963 ◽  
Vol 272 (1348) ◽  
pp. 79-102 ◽  
Keyword(s):  
Magnetic Field ◽  
Resonance Frequency ◽  
Magnetic Moment ◽  
Cyclotron Frequency ◽  
Proton Spin ◽  
Experimental Results ◽  
Consistent Theory ◽  
Free Proton ◽  
Spin Resonance ◽  
Proton Cyclotron

The magnetic moment of the proton has been measured in nuclear magnetons by comparing the proton spin resonance frequency with the proton cyclotron frequency in the same magnetic field. A consistent theory of the motion of the ions in the modified decelerating cyclotron used for measuring the cyclotron frequency has been developed in order to interpret the experimental results. Deceleration of protons by means of a decelerating protential at eight and sixteen times their cyclotron frequency, and of H + 2 ions at sixteen times their cyclotron frequency were observed. The result, related to the spin resonance frequency of the free proton, is that the magnetic moment of the proton is 2·79277 ± 0·00005 nuclear magnetons.

Eigenvalues of the axially symmetrical electromagnetic waves along an infinitely long and conductive circular cylinder in a homogeneous magnetoionic medium

1969 ◽  
Vol 47 (11) ◽  
pp. 1159-1166 ◽  
Author(s):  
K. Aoki
Keyword(s):  
Electromagnetic Field ◽  
Circular Cylinder ◽  
Electromagnetic Waves ◽  
Cyclotron Frequency ◽  
Numerical Results ◽  
Complex Conjugate ◽  
Field Frequency ◽  
Radial Propagation

This paper discusses eigenvalues of the electromagnetic field along an infinitely long and conductive circular cylinder imbedded in a magnetoionic medium under assumptions that the medium is lossless and the field frequency is not equal to the cyclotron frequency. It is shown that they are classified into two kinds: (i) k1 and k2 are pure imaginary and (ii) k22 = (complex conjugate of k12), where k1 and k2 are the radial propagation constants and that no eigenvalues exist in the region bounded by [Formula: see text] where ωp and ωc are the plasma and cyclotron frequencies normalized to the field frequency. Some numerical results in the case of (radius of the cylinder/wavelength) [Formula: see text] are also shown.

scholarly journals Solar Orbiter’s first Venus Flyby: MAG observations of structures and waves associated with the induced Venusian magnetosphere

2021 ◽  
Author(s):  
Martin Volwerk ◽  
Keyword(s):  
Magnetic Field ◽  
Solar Wind ◽  
High Frequency ◽  
Cyclotron Frequency ◽  
Plasma Waves ◽  
Bow Shock ◽  
High Frequency Plasma ◽  
Frequency Plasma ◽  
Mirror Mode ◽  
Proton Cyclotron

<p>The induced magnetosphere of Venus is created by the interaction of the solar wind and embedded interplanetary magnetic field with the exosphere and ionosphere of Venus. Solar Orbiter entered Venus’s magnetotail far downstream, > 70 Venus radii, of the planet and exited the magnetosphere over the north pole. This offered a unique view of the system over distances that were only flown through once by three other missions before, Mariner 10, Galileo and Bepi-Colombo. The large-scale structure and activity of the induced magnetosphere is studied as well as the high-frequency plasma waves both in the magnetosphere and in a limited region upstream of the planet where interaction with Venus’s exosphere is expected.  It is shown that Venus’s magnetotail is very active during the Solar Orbiter flyby. Structures such as flux ropes, and reconnection sites are encountered as well as a strongly overdraping of the magnetic field downstream of the bow shock and planet. High-frequency plasma waves (up to 6 times the local proton cyclotron frequency) are observed in the magnetotail, which are identified as Doppler-shifted proton cyclotron waves, whereas in the upstream solar wind these waves appear just below the proton cyclotron frequency (as expected) but are very patchy. The bow shock is quasi perpendicular, however, expected mirror mode activity is not found directly behind it; instead there is strong cyclotron wave power. This is most-likely caused by the relatively low plasma-beta  behind the bow shock. Much further downstream in the magnetosheath mirror mode of magnetic hole structures are identified. This presentation will take place after the second Venus flyby by Solar Orbiter and BepiColombo and Solar Orbiter on 9 and 10 August, respectively.</p>

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