Effects of External Magnetic Field on Intensity of Plasma Flow

2014 ◽  
Vol 597 ◽  
pp. 272-275
Author(s):  
Ching Yen Ho ◽  
Yu Hsiang Tsai ◽  
Chung Ma
Keyword(s):  
Magnetic Field ◽  
Steady State ◽  
External Magnetic Field ◽  
Plasma Flow ◽  
Intensity Distribution ◽  
Transverse Direction ◽  
Radial Direction ◽  
Intensity Profile ◽  
Intensity Enhancement

This paper investigates the intensity distribution along the radial direction for plasma flow subject to external magnetic Field. The toroidal external magnetism is applied in the transverse direction of plasma flow. Considering the steady-state continuity and momentum of the plasma flow subject to external magnetic field, the intensity profile of the plasma is obtained. The results quantitatively verify the intensity enhancement of the plasma with the increasing external magnetic field.

Kinetic simulation technique for plasma flow in strong external magnetic field

2017 ◽  
Vol 351 ◽  
pp. 358-375 ◽  
Author(s):  
Frans H. Ebersohn ◽  
J.P. Sheehan ◽  
Alec D. Gallimore ◽  
John V. Shebalin
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Plasma Flow ◽  
Simulation Technique ◽  
Kinetic Simulation

scholarly journals The Operation of UAV Propulsion Motors in the Presence of High External Magnetic Fields

Robotics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 79
Author(s):  
Mohammad Heggo ◽  
Anees Mohammed ◽  
Juan Melecio ◽  
Khristopher Kabbabe ◽  
Paul Tuohy ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Steady State ◽  
External Magnetic Field ◽  
Direct Torque Control ◽  
Torque Control ◽  
Stable Operation ◽  
Field Oriented Control ◽  
Inspection Robots ◽  
The Impact ◽  
State Error

The operation and maintenance of converter stations (also known as valve halls) in high voltage DC (HVDC) grids is a key element in long-term, reliable and stable operation, especially in inherently adverse offshore environments. However, the nature of the electromagnetic field environment inside HVDC valve halls presents a challenge for the operation of traditional off-shelf inspection robots. In this paper, the impact of the external magnetic field on the operation of an inspection UAV’s propulsion motors is assessed. An experimental method is proposed to simulate the maximum magnetic field interference to off-shelf UAV motors, which can be used to identify their suitability for use in HVDC valve halls inspection robots. The paper’s experimental results compare the performance of direct torque control and field-oriented control algorithms for propulsion motors under the influence of external magnetic flux. Under the influence of a 177 mT external magnetic field, it was found that using direct torque control, the motor rotational velocity steady-state error was up to 55%. With field-oriented control, the steady-state error was 0%, however the peak-to-peak current draw increased by up to 567%.

scholarly journals Magnetic control of the plasma flows in laser targets

1994 ◽  
Vol 12 (3) ◽  
pp. 371-377 ◽  
Author(s):  
S.Yu. Gus'kov ◽  
V.B. Rozanov ◽  
T. Pisarczyk
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Laser Beam ◽  
Plasma Flow ◽  
Laser Beams ◽  
Magnetic Control ◽  
Plasma Flows ◽  
The Magnetic Field ◽  
Magnetic Field Transverse

The idea of controlling the plasma flows in laser targets by action of a strong external magnetic field (H ≥ 1 MG) is presented. The magnetic control of plasma flows for the keeping of a transparency of entrance holes of indirect-compression targets and other type targets operating at an introduction of the laser beams into the interior of the target is suggested. It is shown that the magnetic field, transverse versus the direction of the propagation of the plasma flow with an intensity of 2–4 MG, causes a decrease (1.5–3 times) of the closing speed of holes for the laser beam introduction into the hohlraum target.

scholarly journals Experimental platform for the investigation of magnetized-reverse-shock dynamics in the context of POLAR

2018 ◽  
Vol 6 ◽  
Author(s):  
B. Albertazzi ◽  
E. Falize ◽  
A. Pelka ◽  
F. Brack ◽  
F. Kroll ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Plasma Flow ◽  
Rear Side ◽  
Reverse Shock ◽  
Shock Dynamics ◽  
High Mach ◽  
Magnetohydrodynamic Simulations ◽  
Polar Type ◽  
Multilayer Target

The influence of a strong external magnetic field on the collimation of a high Mach number plasma flow and its collision with a solid obstacle is investigated experimentally and numerically. The laser irradiation ($I\sim 2\times 10^{14}~\text{W}\cdot \text{cm}^{-2}$) of a multilayer target generates a shock wave that produces a rear side plasma expanding flow. Immersed in a homogeneous 10 T external magnetic field, this plasma flow propagates in vacuum and impacts an obstacle located a few mm from the main target. A reverse shock is then formed with typical velocities of the order of 15–20 $\pm$ 5 km/s. The experimental results are compared with 2D radiative magnetohydrodynamic simulations using the FLASH code. This platform allows investigating the dynamics of reverse shock, mimicking the processes occurring in a cataclysmic variable of polar type.

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