Effect of the induced-dipole force on charging rates of aerosol particles

Robertson, Scott; Sternovsky, Z.

doi:10.1063/1.2907162

Cited by 7 publications

(12 citation statements)

References 10 publications

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“…The loss coefficient of ions on ice parti-cles is D + = n q ν i,q , where n q is the number density of the q-charged ice particles and ν i,q represents the capture rate of ions by ice particles with q charges. According to the discrete charging model (Robertson and Sternovsky, 2008),…”

Section: Modelmentioning

confidence: 99%

“…The ion thermal velocity is c i = (8k B T g /π m i ); k B is the Boltzmann constant; and ε 0 is the permittivity of a vacuum. The C q and D q are provided in Table 1 in the work of Robertson and Sternovsky (Robertson and Sternovsky, 2008), and the corresponding capture rates of electrons by ice particles (Robert-…”

Section: Modelmentioning

confidence: 99%

“…Polar mesosphere summer echoes (PMSEs) are strong radar echoes from the polar mesopause in summer (Rapp and Lübken, 2004). One of the features of the PMSEs is that the spectral widths of echoes are much narrower than that of incoherent scatter due to the Brownian movement of electrons (Röttger, et al, 1988(Röttger, et al, , 1990. It has been proposed that the PMSEs are caused by radar waves coherently scattered by irregularities in the refractive index, which are mainly determined by electron density (Rapp and Lübken, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Research on small-scale structures of ice particle density and electron density in the mesopause region

Tian

et al. 2019

Ann. Geophys.

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Abstract. The formation of ice particle density irregularities with a meter scale in the mesopause region is explored in this paper by developing a growth and motion model of ice particles based on the motion equation of a variable mass object. The growth of particles by water vapor adsorption and the action of gravity and the neutral drag force on particles are considered in the model. The evolution of the radius, velocity, and number density of ice particles is then investigated by solving the growth and motion model numerically. For certain nucleus radii, it is found that the velocity of particles can be reversed at a particular height, leading to a local gathering of particles near the boundary layer, which then forms small-scale ice particle density structures. The spatial scale of the density structures can be affected by vertical wind speed, water vapor density, and altitude, and it remains stable as long as these environmental parameters do not change. The influence of the stable small-scale structures on electron and ion density is further calculated by a charging model, which considers the production, loss, and transport of electrons and ions, along with dynamic particle charging processes. Results show that the electron density is anti-correlated to the charged ice particle density and ion density for particles with radii of 11 nm or less due to plasma attachment by particles and plasma diffusion. This finding is in accordance with most rocket observations. The small-scale electron density structures created by small-scale ice particle density irregularities can produce the polar mesosphere summer echo (PMSE) phenomenon.

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Section: Modelmentioning

confidence: 99%

Section: Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Research on small-scale structures of ice particle density and electron density in the mesopause region

Tian

et al. 2019

Ann. Geophys.

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“…The particle radius in this study is less than 11 nm, and an ice particle carries two negative elementary charges at most. The quantized stochastic charging model (Robertson and Sternovsky 2008) is more appropriate to determine the particle charge. Therefore, we modify the plasma model and use the quantized stochastic charging model to calculate the capture rates of electrons and ions by ice particles.…”

Section: Responsementioning

confidence: 99%

Response letter

Tian¹

2019

Preprint

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“…Here C Z and D Z depend on charge state Z and some numerical values are given in table 1 of Robertson and Sternovsky (2008). The terms involving C Z and D Z correspond to the Coulomb and dipole force contributions, respectively.…”

Section: Plasma Density Potential and Electric Field Structuresmentioning

confidence: 99%

Charged dust phenomena in the near-Earth space environment

Scales

Mahmoudian

2016

Rep. Prog. Phys.

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Dusty (or complex) plasmas in the Earth's middle and upper atmosphere ultimately result in exotic phenomena that are currently forefront research issues in the space science community. This paper presents some of the basic criteria and fundamental physical processes associated with the creation, evolution and dynamics of dusty plasmas in the near-Earth space environment. Recent remote sensing techniques to probe naturally created dusty plasma regions are also discussed. These include ground-based experiments employing high-power radio wave interaction. Some characteristics of the dusty plasmas that are actively produced by space-borne aerosol release experiments are discussed. Basic models that may be used to investigate the characteristics of such dusty plasma regions are presented.

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Effect of the induced-dipole force on charging rates of aerosol particles

Cited by 7 publications

References 10 publications

Research on small-scale structures of ice particle density and electron density in the mesopause region

Research on small-scale structures of ice particle density and electron density in the mesopause region

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Charged dust phenomena in the near-Earth space environment

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