Measurement of Electron and Neutral Atom Density Downstream of an Electric Propulsion

2016 ◽  
Author(s):  
Naoji Yamamoto ◽  
Masataka Iwamoto ◽  
Taichi Morita ◽  
Hideki Nakashima
Keyword(s):  
Electric Propulsion ◽  
Neutral Atom ◽  
Atom Density

Measurements of the behaviour of neutral atom density in a diffuse vacuum arc by laser-induced fluorescence (LIF)

1989 ◽  
Vol 17 (5) ◽  
pp. 666-671 ◽  
Author(s):  
E. Hayess ◽  
B. Juttner ◽  
G. Lieder ◽  
W. Neumann ◽  
H. Pursch ◽  
...  
Keyword(s):  
Neutral Atom ◽  
Laser Induced Fluorescence ◽  
Vacuum Arc ◽  
Atom Density

Laser-Enhanced Ionization Flame Velocimeter

1982 ◽  
Vol 36 (2) ◽  
pp. 168-171 ◽  
Author(s):  
P. K. Schenck ◽  
J. C. Travis ◽  
G. C. Turk ◽  
T. C. O'Haver
Keyword(s):  
Laminar Flow ◽  
Low Power ◽  
Flow Velocity ◽  
Neutral Atom ◽  
Seed Density ◽  
Spatial Evolution ◽  
Atom Density ◽  
Low Sodium ◽  
Temporal And Spatial ◽  
Better Than

The temporal and spatial evolution of the depleted neutral atom density following laser-enhanced ionization in laminar flow flames has been used to characterize the flow velocity of the flame gases. This technique utilizes a low power cw dye laser and a low sodium seed density (1011 to 1012 atoms/ml). The flow velocity can be measured to better than 2% in standard analytical burners.

Neutral Atom Density at Current Zero in Interruption of Intense-Mode Vacuum Arc

2021 ◽  
Author(s):  
Ryo Kikuchi ◽  
Yuichi Hirano ◽  
Haruki Ejiri ◽  
Yuki Inada ◽  
Akiko Kumada ◽  
...  
Keyword(s):  
Neutral Atom ◽  
Vacuum Arc ◽  
Atom Density ◽  
Current Zero

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

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