Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Simulations of magnetic field reversal by neutral beam injection in a mirror-confined plasma
View through CrossRef
In the Norm experiment at TAE Technologies, a reversed field configuration (FRC) is formed by reversing the magnetic field of a mirror configuration using neutral beam injection. An FRC is formed and sustained in a steady state by the diamagnetic current of the thermal plasma and the azimuthal current provided by fast ions. In the present paper, we present numerical simulations of FRC formation using the Q2D code. Q2D is a code that couples 2D MHD equations with separate ion and electron temperatures, a fluid model for the neutral gas, and a 3D Monte Carlo module, which is used to calculate neutral beam injection, fast ion orbits, and their interaction with the thermal plasma and neutral fluid. We use Q2D to simulate the FRC formation and sustainment by neutral beam injection, and we study the effects of different beam injection angles, impact parameters, equilibrium magnetic fields, and neutral beam current. We analyze the different types of fast ion orbits and their contribution to the diamagnetic current. The simulations show that the fast ion current can reverse the magnetic field if the current density is sufficiently high. Equilibria with higher magnetic field require higher diamagnetic current density for FRC formation.
Title: Simulations of magnetic field reversal by neutral beam injection in a mirror-confined plasma
Description:
In the Norm experiment at TAE Technologies, a reversed field configuration (FRC) is formed by reversing the magnetic field of a mirror configuration using neutral beam injection.
An FRC is formed and sustained in a steady state by the diamagnetic current of the thermal plasma and the azimuthal current provided by fast ions.
In the present paper, we present numerical simulations of FRC formation using the Q2D code.
Q2D is a code that couples 2D MHD equations with separate ion and electron temperatures, a fluid model for the neutral gas, and a 3D Monte Carlo module, which is used to calculate neutral beam injection, fast ion orbits, and their interaction with the thermal plasma and neutral fluid.
We use Q2D to simulate the FRC formation and sustainment by neutral beam injection, and we study the effects of different beam injection angles, impact parameters, equilibrium magnetic fields, and neutral beam current.
We analyze the different types of fast ion orbits and their contribution to the diamagnetic current.
The simulations show that the fast ion current can reverse the magnetic field if the current density is sufficiently high.
Equilibria with higher magnetic field require higher diamagnetic current density for FRC formation.
Related Results
Magnetohydrodynamics enhanced radio blackout mitigation system for spacecraft during planetary entries
Magnetohydrodynamics enhanced radio blackout mitigation system for spacecraft during planetary entries
(English) Spacecraft entering planetary atmospheres are enveloped by a plasma layer with high levels of ionization, caused by the extreme temperatures in the shock layer. The charg...
Overview of Key Zonal Water Injection Technologies in China
Overview of Key Zonal Water Injection Technologies in China
Abstract
Separated layer water injection is the important technology to realize the oilfield long-term high and stable yield. Through continuous researches and te...
Analysis of magnetohydrodynamic drag character for hypersonic vehicles
Analysis of magnetohydrodynamic drag character for hypersonic vehicles
In hypersonic flight, a very high temperature area can form ahead of the nose of aerocraft due to the shock aerodynamic heating, which leads to air weakly ionized. Many researchers...
Effects of width and density of supersonic molecule beam on penetration depth of tokamak
Effects of width and density of supersonic molecule beam on penetration depth of tokamak
The penetration depth and the fueling efficiency of the supersonic molecular beam injection (SMBI) are affected by both the intrinsic parameters of the SMBI and the parameters of b...
Magnetic cloak made of NdFeB permanent magnetic material
Magnetic cloak made of NdFeB permanent magnetic material
In the past few years, the concept of an electromagnetic invisibility cloak has received much attention. Based on the pioneering theoretical work, invisibility cloaks have been gre...
Rubidium atomic magnetometer based on pump-probe nonlinear magneto-optical rotation
Rubidium atomic magnetometer based on pump-probe nonlinear magneto-optical rotation
We report a rubidium atomic magnetometer based on pump-probe nonlinear magneto-optical rotation. The rubidium vapor cell is placed in a five-layer magnetic shield with inner coils ...
Commissioning a beam line for MR‐guided particle therapy assisted by in silico methods
Commissioning a beam line for MR‐guided particle therapy assisted by in silico methods
AbstractBackgroundRadiation therapy is continuously moving towards more precise dose delivery. The combination of online MR imaging and particle therapy, for example, radiation the...
Electric fields parallel to the magnetic field in a laboratory plasma in a magnetic mirror field
Electric fields parallel to the magnetic field in a laboratory plasma in a magnetic mirror field
With electrostatic probes, the electric field component E∥ along the magnetic field B was comprehensively investigated in a collisionless plasma, the density of which was of the or...