Temperature gradient in Hall thrusters

Staack, D.; Raitses, Y.; Fisch, N. J.
April 2004
Applied Physics Letters;4/19/2004, Vol. 84 Issue 16, p3028
Academic Journal
Plasma potentials and electron temperatures were deduced from emissive and cold floating probe measurements in a 2 kW Hall thruster, operated in the discharge voltage range of 200–400 V. An almost linear dependence of the electron temperature on the plasma potential was observed in the acceleration region of the thruster both inside and outside the thruster. This result calls into question whether secondary electron emission from the ceramic channel walls plays a significant role in electron energy balance. The proportionality factor between the axial electron temperature gradient and the electric field is also significantly smaller than might be expected by fluid models. © 2004 American Institute of Physics.


Related Articles

  • Two-surface wave decay: improved analytical theory and effects on electron acceleration. Macchi, A.; Battaglini, M.; Cattani, F.; Cornolti, F. // Applied Physics B: Lasers & Optics;May/Jun2004, Vol. 78 Issue 7/8, p915 

    Two-surface wave decay (TSWD), i.e., the parametric excitation of electron surface waves, was recently proposed as an absorption mechanism in the interaction of ultrashort, intense laser pulses with solid targets. We present an extension of the fluid theory of TSWD to a warm plasma that treats...

  • Parameters of a multicomponent laser-induced plasma. Chuchman, M.; Shuaibov, A.; Laslov, G.; Shimon, L. // Technical Physics;Jan2011, Vol. 56 Issue 1, p151 

    We report on the results of analysis of parameters of a laser-induced plasma, which were obtained using emission diagnostics of a laser torch plasma from a CuInSe polycrystalline target. The density and temperature of electrons in a laser torch with a complex composition are determined. The...

  • Photon coupling theory for plasmas with strong Compton scattering: Four temperature theory. Molvig, Kim; Alme, Marv; Webster, Robert; Galloway, Conner // Physics of Plasmas;Feb2009, Vol. 16 Issue 2, pN.PAG 

    When an equimolar mixture of deuterium (D) and tritium (T) at high density undergoes fusion burn, the system becomes extremely nonequilibrium. The ion temperature rises much higher than the electron temperature which, in turn, is much higher than the radiation temperature. Accurately simulating...

  • Characteristic Features of Electron�Ion Collisions in Strong Electric Fields. Balakin, A. A.; Mironov, V. A.; Fraiman, G. M. // Plasma Physics Reports;Jun2001, Vol. 27 Issue 6, p462 

    The classical motion of an electron in the Coulomb field of an ion and in a uniform external electric field is analyzed. A nondimensionalization method that makes it possible to study electron motion in arbitrarily strong electric fields is proposed. The possible electron trajectories in the...

  • Power deposition and current drive by intense microwave beams in tokamaks. Kritz, Arnold H.; Smith, Gary R.; Nevins, William McCay; Cohen, R. H. // Physics of Fluids B: Plasma Physics;Jan89, Vol. 1 Issue 1, p142 

    Electron trapping by intense wave electric fields can alter the power deposition of electron-cyclotron waves in a tokamak when high-power sources are employed. The effect of wave trapping is examined in a ray-tracing study that utilizes plasma and wave parameters appropriate for the Microwave...

  • Estimation of the Longitudinal Electric Field Produced by a Relativistic Electron Beam in a Plasma. Vladyko, V. B. // Technical Physics;May2001, Vol. 46 Issue 5, p640 

    An axially symmetric model is used to analytically estimate the longitudinal electric field created in a plasma by an injected electron beam. The relationship can be used to estimate the electron beam energy loss in the range of parameters where theoretical studies rely only on numerical...

  • Spectroscopic diagnosis of long-scale-length exploding-foil plasma in the presence of an intense radiation field. Shepard, T. D.; Keane, C. J.; Suter, L. J.; Abdallah, J. // Review of Scientific Instruments;Oct92, Vol. 63 Issue 10, p5101 

    An effective technique for measuring the local electron temperature and density of a laser-produced plasma involves analysis of the emission and/or absorption spectrum from an impurity dopant. However, when an intense high-energy radiation field is present the ionization balance, level...

  • Temperature-gradient instability induced by conducting end walls. Berk, H. L.; Ryutov, D. D.; Tsidulko, Yu. A. // Physics of Fluids B: Plasma Physics;Jun91, Vol. 3 Issue 6, p1346 

    A new rapidly growing electron-temperature-gradient instability is found for a plasma in contact with a conducting wall. The linear instability analysis is presented and speculations are given for its nonlinear consequences. This instability illustrates that conducting walls can produce effects...

  • Dynamics of an ion flow in an electron layer. Kovalenko, Yu.; Chikhachev, A. // Technical Physics;May2013, Vol. 58 Issue 5, p770 

    We study the acceleration of an ion flow in the electron layer formed by an electron flow moving in a transverse electric field and confined by the intrinsic magnetic field. The possibility of extraction of heavy ions with velocities lower than the ion sound velocity from the plasma, and the...


Read the Article


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

Try another library?
Sign out of this library

Other Topics