Development and Validation of Simplified 1D Models for Hollow Cathode Analysis and Design

Panelli, Mario; Smoraldi, Antonio; Simone, Valeria De; Battista, Francesco

doi:10.1007/bf03405800

Aerotec. Missili Spaz.

2018

DOI: 10.1007/bf03405800

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Development and Validation of Simplified 1D Models for Hollow Cathode Analysis and Design

Mario Panelli

Antonio Smoraldi

Valeria De Simone

et al.

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2024

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Establishing criteria for the transition from kinetic to fluid modeling in hollow cathode analysis

Villafana,

Powis,

Sharma

et al. 2024

Physics of Plasmas

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Hollow cathodes for plasma switch applications are investigated via 2D3V particle-in-cell simulations of the channel and plume region. The kinetic nature of the plasma within the channel is dependent on the thermalization rate of electrons, emitted from the insert. When Coulomb collisions occur at a much greater rate than ionization or excitation collisions, the electron energy distribution function rapidly relaxes to a Maxwellian and the plasma within the channel can be described accurately via a fluid model. In contrast, if inelastic processes are much faster than Coulomb collisions, then the electron energy distribution function in the channel exhibits a notable high-energy tail, and a kinetic treatment is required. This criterion is applied to hollow cathodes from the literature, revealing that a fluid approach is suitable for most electric propulsion applications, whereas a kinetic treatment can be more critical to accurate modeling of plasma switches.

show abstract

Establishing criteria for the transition from kinetic to fluid modeling in hollow cathode analysis

Villafana,

Powis,

Sharma

et al. 2024

Physics of Plasmas

View full text Add to dashboard Cite

show abstract

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Development and Validation of Simplified 1D Models for Hollow Cathode Analysis and Design

Cited by 1 publication

References 9 publications

Establishing criteria for the transition from kinetic to fluid modeling in hollow cathode analysis

Establishing criteria for the transition from kinetic to fluid modeling in hollow cathode analysis

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