Asymptotic Magnetic Field Expansion in Mini-Magnetospheric Plasma Propulsion

2003 ◽  
Vol 40 (4) ◽  
pp. 597-598 ◽  
Author(s):  
Donald E. Parks ◽  
Ira Katz
Keyword(s):  
Magnetic Field ◽  
Magnetospheric Plasma ◽  
Plasma Propulsion

Plasma Propulsion by a Rapidly Varying Magnetic Field

1960 ◽  
Vol 31 (8) ◽  
pp. 1437-1448 ◽  
Author(s):  
Milton M. Klein ◽  
Keith A. Brueckner
Keyword(s):  
Magnetic Field ◽  
Plasma Propulsion

scholarly journals Up and downs of a magnetic oblique rotator viewed at high resolution

2016 ◽  
Vol 12 (S329) ◽  
pp. 429-429
Author(s):  
Y. Nazé ◽  
S. A. Zhekov ◽  
A. ud-Doula
Keyword(s):  
Magnetic Field ◽  
High Resolution ◽  
Magnetospheric Plasma ◽  
X Ray ◽  
Oblique Rotator ◽  
Good Agreement

AbstractIn 2006, the Of?p star HD191612 became the second O-star where a magnetic field was discovered. It provided a benchmark to understand the Of?p phenomenon as a whole. Ten years later, an X-ray monitoring performed at high-resolution reveals the behaviour of the hottest magnetospheric plasma: it is located at ~ 2R⊙, hot but not extreme (log(T) ~ 7), producing unshifted lines, and displaying a very repetitive variability. A direct comparison with simulations yields an overall good agreement, with only a few further improvements needed.

Evidence of Alfvénic Interactions in the Jovian Magnetosphere from the Juno Spacecraft

2020 ◽  
Author(s):  
Christopher T.S Lorch ◽  
Licia C. Ray ◽  
Clare E.J. Watt ◽  
Robert J. Wilson ◽  
Frances Bagenal ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Boundary Layer ◽  
Plasma Sheet ◽  
Energetic Particle ◽  
Magnetospheric Plasma ◽  
Thermal Velocity ◽  
Particle Detector ◽  
Plasma Sheet Boundary Layer ◽  
Dominant Mechanism ◽  
Jovian Magnetosphere

<p>New insights provided by Juno energetic particle detector measurements indicate signatures of Alfvénic acceleration are more common than previously anticipated. Studies at Earth show that Alfvén waves can substantially accelerate plasma within the magnetosphere. At Jupiter, it is now predicted that Alfvénic acceleration is the dominant mechanism for generating the planet's powerful aurora. This acceleration occurs when the plasma thermal velocity is approximately equal to the Alfvén velocity, which at Jupiter occurs around the plasma sheet boundary. Using Juno JADE and MAG data, we investigate the regions surrounding the plasma sheet boundary layer in order to identify signatures of Alfvénic activity. Our study finds correlations between inertial scale magnetic field perturbations and variations in the local plasma population. We suggest that these signatures may be linked to turbulence in the plasma disk, which could be a source of heating for magnetospheric plasma observed in other studies.</p>

ENERGY TRANSFER BETWEEN A MOVING BODY AND A MAGNETIC FIELD

1962 ◽  
Vol 40 (3) ◽  
pp. 301-316 ◽  
Author(s):  
P. R. Smy
Keyword(s):  
Magnetic Field ◽  
Energy Transfer ◽  
Scaling Laws ◽  
Maximum Energy ◽  
The Body ◽  
Initial Kinetic Energy ◽  
Plasma Propulsion ◽  
Moving Body ◽  
Direct Energy ◽  
Oscillating Magnetic Field

The inductive transfer of energy between a moving body and a magnetic field is discussed together with its significance in the fields of direct energy conversion and plasma propulsion. The investigation is centered upon the interaction between a moving body and a sinusoidally oscillating magnetic field of idealized distribution. Scaling laws governing the various physical variables of the interaction are derived, and the values of the resultant parameters necessary to obtain maximum energy transfer are calculated. It is found that under these conditions the initial kinetic energy of the body can be increased by ~14× or decreased to ~1/14 during the interaction. The relation between these parameters (and hence the energy transfer) and the all important energy transfer/recirculating energy ratio is obtained and it is shown that, in fact, a working energy factor ~6 (or 1/6) is a more feasible proposition.

scholarly journals Laboratory modeling of a field-aligned currents system generated by a flow of inner magnetospheric plasma

2021 ◽  
Vol 2067 (1) ◽  
pp. 012020
Author(s):  
A Chibranov ◽  
A Berezutsky ◽  
M Efimov ◽  
Y Zakharov ◽  
I Miroshnichenko ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Energy Transfer ◽  
Laboratory Experiments ◽  
Numerical Models ◽  
Magnetospheric Plasma ◽  
Laboratory Modeling ◽  
Hot Jupiters ◽  
First Approximation ◽  
First Time ◽  
The Magnetic Field

Abstract For the first time in laboratory conditions, an experiment to simulate a system of field-aligned currents arising on planets such as Hot Jupiters in the presence of dense inner-magnetospheric plasma was carried out. The magnitude and transit time of field-aligned currents were measured as a function of the magnetic field using flat electrodes. The geometry of the expansion of plasma streams was pictured by gated camera. Also, in a first approximation, the efficiency of energy transfer from plasma flows to field-aligned currents was calculated. The results obtained create a basis for future laboratory experiments on this topic and improve existing numerical models.

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