TITLE

Length control of He atmospheric plasma jet plumes: Effects of discharge parameters and ambient air

AUTHOR(S)
Xiong, Q.; Lu, X.; Ostrikov, K.; Xiong, Z.; Xian, Y.; Zhou, F.; Zou, C.; Hu, J.; Gong, W.; Jiang, Z.
PUB. DATE
April 2009
SOURCE
Physics of Plasmas;Apr2009, Vol. 16 Issue 4, p043505
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The effects of various discharge parameters and ambient gas on the length of He atmospheric plasma jet plumes expanding into the open air are studied. It is found that the voltage and width of the discharge-sustaining pulses exert significantly stronger effects on the plume length than the pulse frequency, gas flow rate, and nozzle diameter. This result is explained through detailed analysis of the I-V characteristics of the primary and secondary discharges which reveals the major role of the integrated total charges of the primary discharge in the plasma dynamics. The length of the jet plume can be significantly increased by guiding the propagating plume into a glass tube attached to the nozzle. This increase is attributed to elimination of the diffusion of surrounding air into the plasma plume, an absence which facilitates the propagation of the ionization front. These results are important for establishing a good level of understanding of the expansion dynamics and for enabling a high degree of control of atmospheric pressure plasmas in biomedical, materials synthesis and processing, environmental and other existing and emerging industrial applications.
ACCESSION #
38611526

 

Related Articles

  • Stabilization of resistive wall modes by slow plasma rotation. Boozer, Allen H. // Physics of Plasmas;Dec95, Vol. 2 Issue 12, p4521 

    Studies the stabilization of resistive wall modes by slow plasma rotation. Subclass of ideal kinks that avoid driving magnetic islands and stabilization by slow rotation; Causes of external kink instabilities; Calculation and description of the stability of the wall modes.

  • Kinetics of the self compression and heating of a dense plasma. Pozwolski, Alexandre E. // Physics of Plasmas;Mar2001, Vol. 8 Issue 3, p1022 

    A dense degenerated oxygen plasma at a temperature lower than the equilibrium temperature is considered. Such plasma will reheat because of contraction; the kinetics of such a process is investigated by integration of the Poincaré-Eddington equation. The temperature may increase by a factor...

  • PLASMA AND FUSION PHYSICS. Schewe, Phillip F.; Jones, Steven; Kulsrud, Russell; Bangerter, R. O. // Physics Today;Jan84, Vol. 37 Issue 1, pS43 

    Discusses plasma and fusion physics. Muon-catalyzed fusion; Fusion reactors with spin polarized nuclei; Chaos and plasma physics; Heavy ion inertial fusion. INSET: CHAOS IN A CHEMICAL REACTION.

  • Simulation of the nonlinear dynamics of grid sheath oscillations in double plasma devices. Rohde, A.; Piel, A.; Klostermann, H. // Physics of Plasmas;Nov97, Vol. 4 Issue 11, p3933 

    Studies the oscillation of ion bunches around a strongly negative grid in a double plasma device, with one-dimensional particle-in-cell simulation. System's exhibition of feedback amplified virtual anode oscillations in the target chamber; Exhibition of nonlinear phenomena like mode locking and...

  • Drift vortices in a rotating magnetoplasma. Shukla, P. K.; Yu, M. Y. // Physics of Fluids (00319171);May86, Vol. 29 Issue 5, p1739 

    It is shown that solitary drift vortices can exist near the outer edge of a rotating magnetoplasma. The plasma rotation modifies the existence region of the usual drift vortices.

  • Fast and small capillary discharge: MHD simulation. Esaulov, Andrey; Sasorov, Pavel; Soto, Leopoldo; Zambra, Marcelo; Sakai, Jun-ichi // AIP Conference Proceedings;2001, Vol. 563 Issue 1, p240 

    Theoretical investigation of the dynamics of plasma discharge, excited by the fast 6 ns FWHM current pulse with 4.5 kA peak in 0.8 mm diameter channel inside the alumina capillary filled with the Ar, is performed by the methods of computer simulation: One-dimensional twotemperature MHD model...

  • Steady-state ion pumping of a potential dip near an electron collecting anode. Forest, Cary; Hershkowitz, Noah // Journal of Applied Physics;8/15/1986, Vol. 60 Issue 4, p1295 

    Presents information on a study that found a negative potential well in front of a positively biased electron collecting plate in a low temperature laboratory plasma. Experimental considerations; Conditions that must be satisfied in order to provide adequate ion pumping.

  • Theory of runaway collisional transport. Tessarotto, Massimo; White, Roscoe B. // Physics of Fluids B: Plasma Physics;Nov93, Vol. 5 Issue 11, p3942 

    The purpose of this paper is to formulate the transport problem for a multispecies rotating toroidal magnetoplasma in the so-called runaway regime, which is defined by an appropriate ordering of relevant characteristic frequencies, in particular, the Larmor frequency, the characteristic...

  • Rethermalization of a field-reversed configuration plasma in translation experiments. Himura, Haruhiko; Okada, Shigefumi // Physics of Plasmas;Jan1995, Vol. 2 Issue 1, p191 

    Shows the experimental observations regarding rethermalization of a field-reversed configuration (FRC) plasma. Translation experiment of FRC plasma on the FIX machine; Loss of some of plasma's axial kinetic energy when it is reflected by the magnetic mirror field.

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics