2014
DOI: 10.1002/ctpp.201400036
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Global Numerical Model for the Assessment of the Effect of Geometry and Operation Conditions on Insert and Orifice Region Plasmas of a Thermionic Hollow Cathode Electron Source

Abstract: Thermionic hollow cathodes have been widely used in wide variety of areas such as spacecraft electric propulsion systems, material processing and lasers for more than half a century as efficient electron sources. Especially in electric propulsion systems, hollow cathodes are being used as electron sources for propellant ionization and ion beam neutralization. Moreover, it is also a promising candidate for utilization as a stand-alone propulsion system in microsatellites or nanosatellites due to its small physi… Show more

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Cited by 5 publications
(4 citation statements)
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“…In each case, the inner surface of the LaB 6 insert is kept at 1500 • C, which is sustained by the self-heating mechanism of the cathode plasma. Heat transfer from the insert region plasma is important in determining the power needed for sustaining the self heating mechanism [19]. In order to simulate the interaction of the cathode with the support structure, the bottom surface of the cathode base part is kept at 400 • C. As the cathode operates in a high vacuum environment, convective heat transfer is neglected.…”
Section: Thermal Analyses Of Different Cathode Designsmentioning
confidence: 99%
See 1 more Smart Citation
“…In each case, the inner surface of the LaB 6 insert is kept at 1500 • C, which is sustained by the self-heating mechanism of the cathode plasma. Heat transfer from the insert region plasma is important in determining the power needed for sustaining the self heating mechanism [19]. In order to simulate the interaction of the cathode with the support structure, the bottom surface of the cathode base part is kept at 400 • C. As the cathode operates in a high vacuum environment, convective heat transfer is neglected.…”
Section: Thermal Analyses Of Different Cathode Designsmentioning
confidence: 99%
“…The electric field of the sheath accelerates the ions towards the emitter surface. Collision of the ions with the emitter surface provides a self heating mechanism [2,18,19]. The self heating mechanism adjusts the insert surface temperature according to the extracted electron current and sustains a plasma inside the cathode tube [20].…”
Section: Introductionmentioning
confidence: 99%
“…Hall Effect Thrusters (HETs), Gridded Ion Thrusters (GITs), High Efficiency Multistage Plasma Thrusters (HEMPTs) [2]. A lot of computational tools, based on phenomenological models, also known as zero-dimensional (0D) or reduced-order models, aimed to predict OHCs' plasma properties and performances and useful to support their design, have been developed since '80s [3][4][5][6][7][8][9][10][11][12].…”
Section: Introductionmentioning
confidence: 99%
“…The equations that constitutes the most of the models presented in the open literature [5][6][7][9][10][11][12] are commonly iteratively solved to face with their own non-linear characteristic. Each author adopts a different approach.…”
Section: Introductionmentioning
confidence: 99%