[hal-00432544, v1] Micro-sphere levitation in a sheath of a low pressure continuous discharge
نویسنده
چکیده
Electrode sheath profile measurements are reported, with dust particles in suspension and without With the shape of the unperturbed potential profile, basic characteristics can be predicted as the surface potential, the charge and potential energy of a dust particle in function of its position in the sheath The dust particle screening length is also estimated analyzing binary collisions in a gas phase cloud In the presence of dust particles, an average increase of ion drift velocities is measured showing that micron-sized particles whose charge is due to the electron and ion fluxes produce a selfconsistent redistribution of the plasma particle fluxes
منابع مشابه
Experimental levitation of dust grains in a plasma sheath
[1] Dust grains have been observed to levitate above the surface of the Moon and as spokes in Saturn’s rings. In order to gain a better understanding of these observations, we have performed levitation experiments on dust grains in a low-density plasma. Plasma sheath potential profiles, measured by an emissive probe, are used to determine the spatial dependence of the electric force on a grain ...
متن کاملGas-liquid Relative Permeability Estimation in 2D Porous Media by Lattice Boltzmann Method: Low Viscosity Ratio 2D LBM Relative Permeability
This work is a primary achievement in studying the CO2 and N2–oil systems. To predict gas-liquid relative permeability curves, a Shan-Chen type multicomponent multiphase lattice Boltzmann model for two-phase flow through 2D porous media is developed. Periodic and bounce back boundary conditions are applied to the model with the Guo scheme for the external body force (i.e.,...
متن کاملComparison of Continuous and Intermittent Feeding Methods in Low Birth Weight Infants
Objective About 1 % of infants are of very low birth weight. However, they comprise about 50% of infant mortality. We compare the effects of continuous versus intermittent feeding on physical growth, gastrointestinal tolerance and macronutrient retention in low birth weight infants (Methods A prospective randomized trial clinical trial was performed from 2004-2005. Very low birth weight neonate...
متن کاملمقایسه گسیل یونی و پرتوی ایکس سخت بین نیتروژن و آرگون در دستگاه پلاسمای کانونی نوع مدر
In this study, some characteristics of a Mather type Plasma Focus (PF) device such as a discharge current, pinch time, ion flux and hard x-ray intensity has been investigated simultaneously in argon and nitrogen gases separately for various operating gas pressures and charging voltages of capacitor bank. It was observed that pinch phenomena was energy and pressure dependent in current sheath as...
متن کاملImproved nanofluid cooling of cylindrical lithium ion battery pack in charge/discharge operation using wavy/stair channels and copper sheath
Abstract: In order to improve the thermal management system for cooling an electric vehicle battery pack, the thermal performance of the battery pack in two states of charge and discharge in different working conditions by using a copper sheath around the batteries and a copper sheath, as well as a stair channel on top of the battery pack and using of nanofluid as cooling fluid, has been studie...
متن کامل