Results 31 to 40 of about 12,411 (357)

Hall thruster ion beam characterization [PDF]

31st Joint Propulsion Conference and Exhibit, 1995
The distribution of ion current density as a function of angle from the thruster axis was measured at nominal operating conditions of 300 Volts discharge voltage and 4.5 Amperes discharge current for two SPT-100 stationary plasma thrusters from Fakel Enterprises, a D-55 anode layer thruster from the Central Scientific Research Institute for Machine ...
David Manzella, John Sankovic
openaire   +1 more source

Computation of Neutral Gas Flow From a Hall Thruster Into a Vacuum Chamber [PDF]

, 2003
The finite pressure present in vacuum chamber testing of space propulsion systems such as Hall thrusters can have a number of undesirable effects. For example, the thrust generated by the thruster is higher and the plume divergence angle larger in ground
Boyd, Iain D., Cai, Chunpei, Gallimore, Alec D., Walker, Mitchell L. R.   +3 more
core   +1 more source

Advanced laboratory for testing plasma thrusters and Hall thruster measurement campaign

Nukleonika, 2016
Plasma engines are used for space propulsion as an alternative to chemical thrusters. Due to the high exhaust velocity of the propellant, they are more efficient for long-distance interplanetary space missions than their conventional counterparts.
Szelecka Agnieszka
doaj   +1 more source

Optimization of Cylindrical Hall Thrusters [PDF]

43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2007
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.
Yevgeny Raitses, Artem Smirnov, Erik Granstedt, Nathaniel J. Fi   +3 more
openaire   +1 more source

Evidence of Counter-Streaming Ions near the Inner Pole of the HERMeS Hall Thruster [PDF]

NASA is continuing the development of a 12.5-kW Hall thruster system to support a phased exploration concept to expand human presence to cis-lunar space and eventually to Mars.
Chaplin V. H., Chaplin V. H., Congress, Frieman J. D., Garnier Y., Gerstenmaier W., Herman D. A., Hofer R. R., Huang W., Huang W., Huang W., Huang W., Huang W., Huang W., Kamhawi H., Kamhawi H., Küstner M., Peterson P. Y., Polk J. E., Smith B. K., Tartz M., Williams G. J., Williams G. J., Yim J.   +23 more
core   +2 more sources

Effects of Magnetic Field Gradient on the Performance of a Magnetically Shielded Hall Thruster

Aerospace, 2023
The objective of this study is to investigate the effects of a magnetic field gradient on the performance of a magnetically shielded Hall thruster. The Particle-in-cell with Monte Carlo collision method (PIC-MCC) is used to simulate the discharge process
Qi Liu, Yong Li, Yanlin Hu, Wei Mao
doaj   +1 more source

Fluid simulation on effect of background magnetic field on plasma characteristics in a Hall thruster

AIP Advances, 2022
Herein, the effect of the background magnetic field on plasma characteristics in a Hall thruster is numerically investigated using DUT-HTFS [Li et al., AIP Adv. 12, 015117 (2022)], an integrated fluid simulation platform on Hall thruster plasmas.
Nannan Li, Yue Liu, Chao Liu, Mingyang Wu   +3 more
doaj   +1 more source

Prospects of Electric Field Control in Perpendicular Magnetic Tunnel Junctions and Emerging 2D Spintronics for Ultralow Energy Memory and Logic Devices

Advanced Functional Materials, EarlyView.
Electric control of magnetic tunnel junctions offers a path to drastically reduce the energy requirements of the device. Electric field control of magnetization can be realized in a multitude of ways. These mechanisms can be integrated into existing spintronic devices to further reduce the operational energy.
Will Echtenkamp, Brahmdutta Dixit, Yifei Yang, Deyuan Lyu, Thomas Peterson, Qi Jia, Yu‐Chia Chen, Jian‐Ping Wang   +7 more
wiley   +1 more source

Experimental investigation of dielectric wall material effects on low-power HEMP thruster

AIP Advances, 2020
The high efficiency multi-staged plasma (HEMP) thruster, also known as the cusped field thruster, becomes a candidate microthruster of new generation space observation missions for its low complexity and potential long life over a wide range of thrust ...
Ming Zeng, Hui Liu, Lei Qiao, Fufeng Wang, Hongyan Huang, Daren Yu   +5 more
doaj   +1 more source

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source