skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Controlled photo-discharge of dust in a complex plasma

Journal Article · · Journal of Plasma Physics

One of the limitations in studying dusty plasmas is that many of the important properties of the dust (like the charge) are directly coupled to the surrounding plasma conditions rather than being determined independently. The application of high-intensity ultraviolet (UV) sources to generate discharging photoelectric currents may provide an avenue for developing methods of controlling dust charge. Careful selection of the parameters of the UV source and dust material may even allow for this to be accomplished with minimal perturbation of the background plasma. The Auburn Magnetized Plasma Research Laboratory (MPRL) has developed a ‘proof-of-concept’ experiment for this controlled photo-discharging of dust; a high-intensity, near-UV source was used to produce large changes in the equilibrium positions of lanthanum hexaboride ($$\textrm {LaB}_6$$) particles suspended in an argon DC glow discharge with negligible changes in the potential, density and temperature profiles of the background plasma. The shifts in equilibrium position of the dust are consistent with a reduction in dust charge. Video analysis is used to quantify the changes in position, velocity and acceleration of a test particle under the influence of the UV and Langmuir probes are used to measure the effects on the plasma.

Research Organization:
Auburn Univ., AL (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
SC0019176
OSTI ID:
1852917
Journal Information:
Journal of Plasma Physics, Vol. 87, Issue 2; ISSN 0022-3778
Publisher:
Cambridge University Press
Country of Publication:
United States
Language:
English

References (34)

Transport of dust particles in glow-discharge plasmas journal January 1992
Thermally assisted photoemission effect on CeB 6 and LaB 6 for application as photocathodes journal July 2017
Dust phenomena in processing plasmas journal May 1997
Melting dynamics of a plasma crystal journal February 1996
The Dynamics of the Interstellar Medium. I. Local Equilibrium. journal May 1941
Dusty plasma effects in Saturn's magnetosphere: DUSTY PLASMAS AT SATURN journal December 2004
On the photoelectric quantum yield of small dust particles journal April 2016
Dusty plasmas in the solar system journal January 1989
Direct measurements of two-dimensional velocity profiles in direct current glow discharge dusty plasmas journal July 1999
Dust: A new challenge in nuclear fusion research? journal January 2000
First experiments in the Dusty Plasma Experiment device journal October 1999
Theory of dust voids in plasmas journal June 1999
Laboratory observation of the dust‐acoustic wave mode journal October 1995
Ion collection by a sphere in a flowing plasma: 2. non-zero Debye length journal July 2003
Characteristics of the dust–plasma interaction near Enceladus’ South Pole journal January 2011
Plasma Crystal: Coulomb Crystallization in a Dusty Plasma journal August 1994
Strongly coupled plasmas obey the fluctuation theorem for entropy production journal September 2017
Superdiffusion and Non-Gaussian Statistics in a Driven-Dissipative 2D Dusty Plasma journal February 2008
Collisionless ion drag force on a spherical grain journal January 2006
Ion drag force in complex plasmas journal October 2002
Thermal Properties of a Dusty Plasma in the Presence of Driven Dust Acoustic Waves journal April 2010
Photoelectric Charging of Dust Particles in Vacuum journal June 2000
On the thermophoresis in dense dust structures in neon plasma journal September 2019
Real-Time Particle Tracking in Complex Plasmas journal April 2016
Dust generation in tokamaks: Overview of beryllium and tungsten dust characterisation in JET with the ITER-like wall journal November 2018
A Study of Ion Drag for Ground and Microgravity Dusty Plasma Experiments journal April 2016
Methods for the characterization of imposed, ordered structures in MDPX journal October 2018
On the Resistance Experienced by Spheres in their Motion through Gases journal June 1924
Ion collection by a sphere in a flowing plasma: 3. Floating potential and drag force journal December 2004
UV-induced Coulomb crystallization of dust grains in high-pressure gas journal January 1996
Probe induced voids in a dusty plasma journal May 2004
Examples for application and diagnostics in plasma–powder interaction journal January 2003
Video analysis of dust events in full-tungsten ASDEX Upgrade journal December 2016
Effect of particle charging on momentum and heat transfer from rarefied plasma flow journal June 1991

Similar Records

Large gyro-orbit model of ion velocity distribution in plasma near a wall in a grazing-angle magnetic field
Journal Article · Mon Feb 01 00:00:00 EST 2021 · Journal of Plasma Physics · OSTI ID:1852917

Electron energization during merging of self-magnetized, high-beta, laser-produced plasmas
Journal Article · Thu Aug 05 00:00:00 EDT 2021 · Journal of Plasma Physics · OSTI ID:1852917

Reimagining full wave rf quasilinear theory in a tokamak
Journal Article · Thu Apr 01 00:00:00 EDT 2021 · Journal of Plasma Physics · OSTI ID:1852917

Related Subjects