NDLI: Dense dust clouds formation in cryogenic plasma

Content Provider	IEEE Xplore Digital Library
Author	Vasilyak, Leonid M. Polyakov, Dmitry N. Petrov, Oleg F. Shumova, Valeria V. Fortov, Vladimir E.
Copyright Year	2010
Description	Author affiliation: JIHTRAS, Moscow, Russia (Vasilyak, Leonid M.; Polyakov, Dmitry N.; Petrov, Oleg F.; Shumova, Valeria V.; Fortov, Vladimir E.)
Abstract	Characteristics of dust structures depend on Debye radius, therefore its change at cooling of dust plasma leads to the reduction of distance between particles and to increase of dust structure density [1]. For the first time, the formation of dust structures from 4.14 microns in diameter MF particles in a neon glow discharge plasma at pressure 0.2-1.1 Torr (T=295 K) and temperature of liquid nitrogen was studied experimentally. The discharge tube of 200 mm length with 16.5 mm i.d. with the hollow cathode and cylindrical anode was cooled by a stream of gaseous nitrogen in optical cryostat. The temperature of a wall of the discharge tube was adjusted in the range 77.4-300K. It was revealed, that the reduction of temperature of gas leads to the appearance of longitudinal fluctuations of particles and reduction of inter-particle distances. At a temperature 200K and current 0.6 mA, the inter-particle distances were observed to reduce down to 50-60 microns in the centre of the structure and 150-200 microns at its edges, from the initial distance of about 280 microns at 295 K. The reduction of gas temperature down to T=77 K resulted to the inter-particle distance reduction down to 25-37 microns in all sections of a dust structure. In this case the fluctuations of particles in a vertical direction with amplitude to 150 microns were observed. One can explain the fluctuations of particles by variation of the longitudinal electric field which is caused by the change of density of gas because of the longitudinal temperature gradient. At increase in pressure of gas and a discharge current, the average distances between particles change slightly, but the dependence of the form of a dust cloud versus the discharge current is observed stably. Pressure reduction leads to the reduction of the quantity of particles in dust cloud and to the stratification of the cloud with the formation of dense clusters consisting of 3-4 particles (in the longitudinal direction), with distances 125-150 microns between them and 25-40 microns between particles in clusters. The voltage-current characteristics of a positive column with dust particles at cryogenic temperatures, was observed to differ essentially from that at a room temperature. This distinction may be explained by the influence of dust particles on the properties of glow discharge, which was analyzed in [2], as well as by the increasing role of atomic metastable states in the course of ionization at low temperatures.
Starting Page	1
Ending Page	1
File Size	88782
Page Count	1
File Format	PDF
ISBN	9781424454747
ISSN	07309244
e-ISBN	9781424454761
e-ISBN	9781424454754
DOI	10.1109/PLASMA.2010.5534161
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Dust acoustic modes in strongly coupled dusty plasmas

Dust molecules, strings, and crystals

Wakes of plasma flowing around dust grains

Wake formation behind a finite-size dust grain in a plasma

Dust dynamics and radiation in fusion plasmas

Charging of Fractal Dust Agglomerates in a Plasma Environment

Dynamics of a microscale dense plasma focus

Dynamics of a dust particulate in ion flow with magnetic field

Interaction between dust particles in weakly ionized gas discharge plasma

Dense dust clouds formation in cryogenic plasma

Similar Documents

Dust acoustic modes in strongly coupled dusty plasmas

Dust molecules, strings, and crystals

Wakes of plasma flowing around dust grains

Wake formation behind a finite-size dust grain in a plasma

Dust dynamics and radiation in fusion plasmas

Charging of Fractal Dust Agglomerates in a Plasma Environment

Dynamics of a microscale dense plasma focus

Dynamics of a dust particulate in ion flow with magnetic field

Interaction between dust particles in weakly ionized gas discharge plasma

Dense dust clouds formation in cryogenic plasma