Author: A. I. SmirnovPublisher:
ISBN:
Category : Electric propulsion
Languages : en
Pages : 29
Book Description
Parametric Investigation of Miniaturized Cylindrical and Annular Hall Thrusters
Author: A. I. SmirnovPublisher:
ISBN:
Category : Electric propulsion
Languages : en
Pages : 29
Book Description
Parametric Investigation of Miniaturized Cylindrical and Annular Hall Thrusters
Author: A. I. SmirnovPublisher:
ISBN:
Category : Electric propulsion
Languages : en
Pages : 29
Book Description
Prinzip und Satzungen des Greifswalder Wingolf
Author: Performance Studies of Miniaturized Cylindrical and Annular Hall Thrusters
Author: A. SmirnovElectron Cross-field Transport in a Miniaturized Cylindrical Hall Thruster
Author: Raitses Yevgeny Smirnov Artem (Fisch Na)Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Conventional annular Hall thrusters become inefficient when scaled to low power. Cylindrical Hall thrusters, which have lower surface-to-volume ratio, are more promising for scaling down. They presently exhibit performance comparable with conventional annular Hall thrusters. The present paper gives a review of the experimental and numerical investigations of electron crossfield transport in the 2.6 cm miniaturized cylindrical Hall thruster (100 W power level). We show that, in order to explain the discharge current observed for the typical operating conditions, the electron anomalous collision frequency {nu}{sub b} has to be on the order of the Bohm value, {nu}{sub B} {approx} {omega}{sub c}/16. The contribution of electron-wall collisions to cross-field transport is found to be insignificant. The optimal regimes of thruster operation at low background pressure (below 10{sup -5} Torr) in the vacuum tank appear to be different from those at higher pressure ({approx} 10{sup -4} Torr).
Fundamentals of Electric Propulsion
Author: Dan M. GoebelPublisher: John Wiley & Sons
ISBN: 1394163231
Category : Technology & Engineering
Languages : en
Pages : 564
Book Description
Fundamentals of Electric Propulsion Understand the fundamental basis of spaceflight with this cutting-edge guide As spacecraft engineering continues to advance, so too do the propulsion methods by which human beings can seek out the stars. Ion thrusters and Hall thrusters have been the subject of considerable innovation in recent years, and spacecraft propulsion has never been more efficient. For professionals within and adjacent to spacecraft engineering, this is critical knowledge that can alter the future of space flight. Fundamentals of Electric Propulsion offers a thorough grounding in electric propulsion for spacecraft, particularly the features and mechanisms underlying Ion and Hall thrusters. Updated in the light of rapidly expanding knowledge, the second edition of this essential guide detailed coverage of thruster principles, plasma physics, and more. It reflects the historic output of the legendary Jet Propulsion Laboratory and promises to continue as a must-own volume for spacecraft engineering professionals. Readers of the second edition of Fundamentals of Electric Propulsion readers will also find: Extensive updates to chapters covering hollow cathodes and Hall thrusters, based on vigorous recent research New sections covering magnetic shielding, cathode plume instabilities, and more Figures and homework problems in each chapter to facilitate learning and retention Fundamentals of Electric Propulsion is an essential work for spacecraft engineers and researchers working in spacecraft propulsion and related fields, as well as graduate students in electric propulsion, aerospace science, and space science courses.
Optimization of Cylindrical Hall Thrusters
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The cylindrical Hall thruster features high ionization efficiency, quiet operation, and ion acceleration in a large volume-to-surface ratio channel with performance comparable with the state-of-the-art annular Hall thrusters. These characteristics were demonstrated in low and medium power ranges. Optimization of miniaturized cylindrical thrusters led to performance improvements in the 50-200W input power range, including plume narrowing, increased thruster efficiency, reliable discharge initiation, and stable operation. __________________________________________________
Development and Characterization of High-efficiency, High-specific Impulse Xenon Hall Thrusters
Author: Richard Robert HoferPublisher:
ISBN:
Category :
Languages : en
Pages : 808
Book Description
Parametric Investigations of Non-conventional Hall Thruster
Author: Y. RaitsesPublisher:
ISBN:
Category : Ion sources
Languages : en
Pages : 38
Book Description
Electron Transport and Ion Acceleration in a Low-power Cylindrical Hall Thruster
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Conventional annular Hall thrusters become inefficient when scaled to low power. Cylindrical Hall thrusters, which have lower surface-to-volume ratio, are therefore more promising for scaling down. They presently exhibit performance comparable with conventional annular Hall thrusters. Electron cross-field transport in a 2.6 cm miniaturized cylindrical Hall thruster (100 W power level) has been studied through the analysis of experimental data and Monte Carlo simulations of electron dynamics in the thruster channel. The numerical model takes into account elastic and inelastic electron collisions with atoms, electron-wall collisions, including secondary electron emission, and Bohm diffusion. We show that in order to explain the observed discharge current, the electron anomalous collision frequency [nu][sub B] has to be on the order of the Bohm value, [nu][sub B] [approx] [omega][sub c]/16. The contribution of electron-wall collisions to cross-field transport is found to be insignificant. The plasma density peak observed at the axis of the 2.6 cm cylindrical Hall thruster is likely to be due to the convergent flux of ions, which are born in the annular part of the channel and accelerated towards the thruster axis.