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Article Dans Une Revue Journal of Physics D: Applied Physics Année : 2022

Structure of the ion acceleration region in cylindrical Hall thruster plasmas

Guentae Doh
  • Fonction : Auteur
Holak Kim
  • Fonction : Auteur
Dongho Lee
  • Fonction : Auteur
Sanghoo Park
  • Fonction : Auteur
Wonho Choe
  • Fonction : Auteur
  • PersonId : 1056683

Résumé

We investigated the structure of the ion acceleration region and the shape of the ion velocity distribution function (IVDF) in cylindrical Hall thruster plasmas, using laser-induced fluorescence spectroscopy on Xe II metastable ions. On the thruster axis, the acceleration front is located deeper than a half-length of the discharge channel length, and the acceleration region reaches up to 3 times the discharge channel length (several centimeters) away from the channel exit, regardless of the discharge condition. It is noteworthy that ion acceleration mostly (more than 70%) takes place outside the discharge channel. The IVDF is close to a single Gaussian inside the discharge channel. It however becomes substantially asymmetric when moving downstream. Double Gaussian distributions including cold and hot ion groups was in good agreement with the measured ion velocity distributions downstream with an R -squared greater than 0.995.
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Dates et versions

hal-03601513 , version 1 (08-03-2022)

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Guentae Doh, Holak Kim, Dongho Lee, Sanghoo Park, Stéphane Mazouffre, et al.. Structure of the ion acceleration region in cylindrical Hall thruster plasmas. Journal of Physics D: Applied Physics, 2022, 55 (22), pp.225204. ⟨10.1088/1361-6463/ac5773⟩. ⟨hal-03601513⟩
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