Approximation of the Mobility of Atomic Ions of Noble Gases in Their Parent Gas

Dust-Acoustic Nonlinear Waves in a Nanoparticle Fraction of Ultracold (2K) Multicomponent Dusty Plasma

“…Taking into account the data in Table 2 , we can obtain n 0i = 2.3 × 10 8 cm −3 . Next, from (1), we obtain the estimate for the ion temperature T i = 45 K. Thus, analysis of the wave process implies T i >> T a at E / N ≈ 10 Td, which confirms the results of [ 16 , 17 , 18 , 19 , 20 , 22 ], obtained by other methods. The value of n 0 e can be approximately estimated from the expression for the discharge current I / S ≈ j = en 0 e u 0 e , where S = π R 2 is the cross-sectional area of the discharge tube, j is the current density, and u 0 e is the drift velocity of electrons.…”

“…It was shown that in cryogenic discharges, at E/N > 10 Td, the effective temperature of the ions can exceed the temperature of the parent gas by an order of magnitude. These results are in good accordance with the conclusions of recent theoretical [ 19 , 20 ] and experimental [ 21 ] works. A similar result, but for dusty plasma, was obtained in [ 22 ] both experimentally and in the framework of the Monte Carlo method.…”

“…To analyze the observed waves, a simple hydrodynamic model was used, which made it possible to estimate important discharge parameters: λ Di , T i , particle drift velocities, etc. Independently of other authors [ 16 , 17 , 18 , 19 , 20 , 21 , 22 ], it was shown that the ions in the discharge are overheated in the presence of a significant electric field. The screening length was determined by the ions ( λ D ≈ λ Di ).…”

“…On the other hand, in [ 9 ], by studying the dust interparticle distance, it was found that the screening radius exceeds the Debye ionic radius by an order of magnitude assuming that the ionic and atomic temperatures are equal. Possible explanations for this phenomenon can be a nonlinear screening of a particle charge [ 14 , 15 ], overheating of ions in the discharge plasma [ 16 , 17 , 18 , 19 , 20 , 21 ], etc. Nevertheless, this issue remains open.…”

Is the atomic metal vapor a dielectric state?

“…Further development of the theory followed the path of searching for effects that lead to more significant ionization potential lower-ing. Let us note a series of works on cluster-drop models [15][16][17][18]. The assumption was that the conversion of ions to cluster [15,17] or drop [16,18] ions would lead to a more significant increase of the free electrons concentration.…”