Wall current closure effects on plasma and sheath fluctuations in Hall thrusters

TY - JOUR

T1 - Wall current closure effects on plasma and sheath fluctuations in Hall thrusters

AU - Frias, Winston

AU - Smolyakov, Andrei I.

AU - Kaganovich, Igor D.

AU - Raitses, Yevgeny

PY - 2014/6

Y1 - 2014/6

N2 - The excitation of negative energy, ion sound type modes driven by the E×B drift and the reactive/dissipative response of the wall sheath interface is analyzed for conditions typical in a Hall thruster. Such sheath impedance modes are sensitive to the dielectric properties of the thruster wall material, which therefore may have direct influence (other than via the secondary electron emission) on fluctuations and transport. Our results predict mode frequencies consistent with the frequencies of fluctuations observed experimentally.

AB - The excitation of negative energy, ion sound type modes driven by the E×B drift and the reactive/dissipative response of the wall sheath interface is analyzed for conditions typical in a Hall thruster. Such sheath impedance modes are sensitive to the dielectric properties of the thruster wall material, which therefore may have direct influence (other than via the secondary electron emission) on fluctuations and transport. Our results predict mode frequencies consistent with the frequencies of fluctuations observed experimentally.

UR - https://www.scopus.com/pages/publications/84903641350

UR - https://www.scopus.com/pages/publications/84903641350#tab=citedBy

U2 - 10.1063/1.4885093

DO - 10.1063/1.4885093

M3 - Article

SN - 1070-664X

VL - 21

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 6

M1 - 062113

ER -