{'fraction_non_alphanumeric': 0.01787538304392237, 'fraction_numerical': 0.004596527068437181, 'mean_word_length': 5.199367088607595, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Simulations of the neon DC discharge with dust-void

Summary form only given. Plasma with dust structures containing internal cavities (dust-void) was numerically investigated. The radial profiles of plasma components and the radial and longitudinal components of the electric field were calculated on the base of diffusion/drift model developed for the positive column of glow discharge in neon with dust particles [1]. The formation, drift, diffusion and losses of electrons, ions and metastable neon atoms were considered in plasma bulk, on the discharge tube walls and on the dust particle surface [2]. The electron temperature, transport coefficients and rate coefficients for electron impact reactions were calculated using the electron Boltzmann equation solver BOLSIG+ combined with the SIGLO Database. The dust particle charging was described in the approximation of collision enhanced collection. The distribution of dust particles in the discharge was set by a step function with a cavity inside, corresponding to the void radius and the concentration of dust particles was close to that observed in experiments [3]. Simulations were carried out for the discharge tube of radius 16.5 mm i.d. and dust particle diameter 2.55 micron. Calculations were carried out with close to the experimentally obtained values of the discharge parameters. The calculation of the radial profiles of plasma components and the radial and longitudinal components of the electric field were carrying out. It was obtained that the longitudinal electric field strength in discharge with dust structures with voids is higher than in pure neon and increases with the reduction of the void size. It was shown that the ratio of metastable atom concentration to electron concentration is higher in the presence of dust structure and increases with decreasing void radius, illustrating the difference between the rates of electron and metastable atom losses on dust particles.