The diffusion of the plasma column inclined at an angle to the magnetic field

Lyatskaya, A. M.; Klimov, Mikhail

doi:10.1016/0021-9169(88)90088-8

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…Within the trail area, the contours of constant density and potential are rotated in the x, y-plane due to the electron Hall drift as seen in the right panel of Figure 7. This feature is similar to that found earlier in simulations with a small box [Lyatskaya and Klimov, 1988]. Beyond the trail, however, the potential is extended along y as in the large-angle case, see the left panel of Figure 7.…”

Section: Simulations Of Trail Diffusion and Fieldssupporting

confidence: 89%

“…The earliest simulations appropriate to meteor diffusion had restricted box sizes which could not properly describe the actual ionospheric situation [ Lyatskaya and Klimov , 1988]. In a more recent series of papers, Oppenheim et al [2003a], Dyrud et al [2002], Oppenheim et al [2000], Dyrud et al [2001], Oppenheim et al [2003b], and Dyrud et al [2005] have simulated the development of plasma instabilities in meteor trails when the axis of an axially symmetric cylindrical plasma trail was perfectly aligned with the geomagnetic field or, in a 2‐D case, making the trail a slab instead of a cylinder.…”

Section: Introductionmentioning

confidence: 99%

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Meteor trail diffusion and fields: 1. Simulations

Dimant¹,

Oppenheim²

2006

J. Geophys. Res.

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[1] A meteoroid penetrating the Earth's atmosphere leaves behind a trail of dense plasma embedded in the lower E/upper D region ionosphere. While radar measurements of meteor trail evolution have been collected and used to infer meteor and atmospheric properties since the 1950s, no accurate quantitative model of trail fields and diffusion exists. This paper describes finite element simulations of trail plasma physics applicable to the majority of small meteors. Unlike earlier research, our simulations resolve both the trail and a vast current closure area in the background ionosphere. This paper also summarizes a newly developed analytical theory of meteor electrodynamics and shows that our simulations and theory predict nearly identical fields and diffusion rates. This study should enable meteor and atmospheric researchers to more accurately interpret radar observations of specular and nonspecular meteor echoes.

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Section: Simulations Of Trail Diffusion and Fieldssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Meteor trail diffusion and fields: 1. Simulations

Dimant¹,

Oppenheim²

2006

J. Geophys. Res.

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“…All existing models of meteor produced fields and diffusion have some fundamental simplifications, limiting their applicability to realistic meteor trails [ Kaiser et al , 1969; Pickering , 1973; Lyatskaya and Klimov , 1988; Dyrud et al , 2001]. A notable study by Jones [1991] developed a 2D solution of meteor trail diffusion, assuming the background plasma had no effect.…”

Section: Introductionmentioning

confidence: 99%

Day to night variation in meteor trail measurements: Evidence for a new theory of plasma trail evolution

Oppenheim

Sugar

Bass

et al. 2008

Geophysical Research Letters

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A recent theory of meteor trail plasma diffusion made the prediction that meteors will generate more and longer lasting non‐specular echoes at night than during the day. This letter presents the first evidence of a dramatic day to night difference in non‐specular meteor trail occurrence rates and their duration. These observations were made by the 50MHz radar at the Jicamarca Radio Observatory (JRO) in Peru. In one 20 minute period starting 95 minutes before sunrise, this radar detected 1288 head echoes and 341 trails while a similar time after dawn, it measured 1240 head echoes but only 50 trails. Also, the duration of the nighttime trails greatly exceeded the daytime ones. This pattern was confirmed by a second experiment in July 2007. This data provides strong evidence that it is necessary to account for the effect of the ionospheric plasma density to explain meteor diffusion.

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Meteors And Interplanetary Dust (Meteores et la Poussiere Interplanetaire?)

McNally¹

1991

Reports on Astronomy

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The diffusion of the plasma column inclined at an angle to the magnetic field

Cited by 5 publications

References 4 publications

Meteor trail diffusion and fields: 1. Simulations

Meteor trail diffusion and fields: 1. Simulations

Day to night variation in meteor trail measurements: Evidence for a new theory of plasma trail evolution

Meteors And Interplanetary Dust (Meteores et la Poussiere Interplanetaire?)

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