EX/P5-4 Two-Fluid Hall Effect on Plasma Relaxation in a High
... where global helicity is conserved. However, while Taylor’s theory successfully captures many RFP properties [1,2], it does not provide information on the processes of relaxation. In the RFP, the mean current (at the magnetic axis) drops significantly during a sawtooth crash accompanied by a toroida ...
... where global helicity is conserved. However, while Taylor’s theory successfully captures many RFP properties [1,2], it does not provide information on the processes of relaxation. In the RFP, the mean current (at the magnetic axis) drops significantly during a sawtooth crash accompanied by a toroida ...
Effects of MHD slow shocks propagating along magnetic flux tubes
... gates inside a dipole flux tube with a progressively decreasing cross section. As a result, the wave amplitude (velocity maximum) has to increase along the flux tube rather than decrease. For linear waves, this effect is qualitatively explained in the Appendix. For nonlinear waves, this effect is st ...
... gates inside a dipole flux tube with a progressively decreasing cross section. As a result, the wave amplitude (velocity maximum) has to increase along the flux tube rather than decrease. For linear waves, this effect is qualitatively explained in the Appendix. For nonlinear waves, this effect is st ...
Induction plasma spheroidization of nanometric glass powder for use in cementations materials
... Figure 4 shows the compressive strength of mortar as a function of the curing time (1, 7, 28 and 56 days). At early age (<7 days), SGP 1% and 5% mortars show similar compressive strengths to the control. In the case of the control, the compressive strengths are given by the hydration of cement, wher ...
... Figure 4 shows the compressive strength of mortar as a function of the curing time (1, 7, 28 and 56 days). At early age (<7 days), SGP 1% and 5% mortars show similar compressive strengths to the control. In the case of the control, the compressive strengths are given by the hydration of cement, wher ...
OV/P-9 Overview of simulation results using - iaea
... codes (GENE, GKW, ORB5, EUTERPE, GYSELA) joined a gyrokinetic global code benchmark that ultimately shows agreement of Eulerian and PIC based codes on electromagnetic micro instabilities (18). Plasma turbulence and related transport processes Plasma turbulence simulations have moved towards full tor ...
... codes (GENE, GKW, ORB5, EUTERPE, GYSELA) joined a gyrokinetic global code benchmark that ultimately shows agreement of Eulerian and PIC based codes on electromagnetic micro instabilities (18). Plasma turbulence and related transport processes Plasma turbulence simulations have moved towards full tor ...
Dissipation and heating in solar wind turbulence: from the macro to
... plasma physics and statistical mechanics to signal processing and high-performance computing. Plasmas exhibit diverse physical phenomena which range from macroscopic scales on the size of planetary and galactic systems where the plasma is behaving as a turbulent fluid with random intermittent magnet ...
... plasma physics and statistical mechanics to signal processing and high-performance computing. Plasmas exhibit diverse physical phenomena which range from macroscopic scales on the size of planetary and galactic systems where the plasma is behaving as a turbulent fluid with random intermittent magnet ...
Tutorial: 2009 Space Physics Seminar
... How are these waves produced? Linear mode conversion: Mode conversion can take place from a surface Alfvén wave (Hasegawa, 1976), from compressional plasma sheet waveguide modes (Allan and Wright, 1998), or from compressional waves in plasma sheet (Lee et al., 2001). Reconnection at distant neutral ...
... How are these waves produced? Linear mode conversion: Mode conversion can take place from a surface Alfvén wave (Hasegawa, 1976), from compressional plasma sheet waveguide modes (Allan and Wright, 1998), or from compressional waves in plasma sheet (Lee et al., 2001). Reconnection at distant neutral ...
The Use of RF Waves in Space Propulsion Systems
... that is inexorably constrained to be inefficient by the Second Law of Thermodynamics. Thus, the best chemical rockets have I sp : 350-460 s. All rockets, including electric propulsion systems that operate as heat engines using a physical mechanical nozzle, ultimately encounter very similar thermodyn ...
... that is inexorably constrained to be inefficient by the Second Law of Thermodynamics. Thus, the best chemical rockets have I sp : 350-460 s. All rockets, including electric propulsion systems that operate as heat engines using a physical mechanical nozzle, ultimately encounter very similar thermodyn ...
Magnetic reconnection and relaxation phenomena in Spherical Tokamak
... core hot plasma region is directly connected to the external cold plasma region by the tunnel-like jet flow. The heat energy stored inside the torus is ejected in this mechanism, much like to put a hole on a rubber ball. The heat expulsion can proceed much quicker than a diffusive process through st ...
... core hot plasma region is directly connected to the external cold plasma region by the tunnel-like jet flow. The heat energy stored inside the torus is ejected in this mechanism, much like to put a hole on a rubber ball. The heat expulsion can proceed much quicker than a diffusive process through st ...
Effect of the polarization drift in a strongly magnetized plasma
... coupling between the Vlasov and Poisson equations. This means that in general, Eε never converges strongly, but only weakly. It is well known that weak convergence behaves nastily with respect to multiplication: resonance effects may appear and produce a non-trivial mean transport. As a result, the ...
... coupling between the Vlasov and Poisson equations. This means that in general, Eε never converges strongly, but only weakly. It is well known that weak convergence behaves nastily with respect to multiplication: resonance effects may appear and produce a non-trivial mean transport. As a result, the ...
A new instrument for the study of wave-particle interactions in... One-chip Wave-Particle Interaction Analyzer
... instruments on-board spacecraft take on the role of observing wave-particle interactions in space. Previous plasma wave receivers and plasma instruments were completely independent. In typical space missions, they were not controlled in coordinated ways and did not interact with each other. This ind ...
... instruments on-board spacecraft take on the role of observing wave-particle interactions in space. Previous plasma wave receivers and plasma instruments were completely independent. In typical space missions, they were not controlled in coordinated ways and did not interact with each other. This ind ...
Simulation study of the plasma
... give a good fit to the present simulation results. This value is about 2.25 times larger than the value 1.72 used in our previous work (Janhunen, 2009). We think that this difference may arise because, in the earlier work, we used typical solarwind parameters so that the ratio Vw / Vi was about 10, ...
... give a good fit to the present simulation results. This value is about 2.25 times larger than the value 1.72 used in our previous work (Janhunen, 2009). We think that this difference may arise because, in the earlier work, we used typical solarwind parameters so that the ratio Vw / Vi was about 10, ...
Solar Wind
... distance" is the gyroradius, and the "effective collision frequency" is the gyrofrequency. ...
... distance" is the gyroradius, and the "effective collision frequency" is the gyrofrequency. ...
Gerhardt_Characteristics Poster_APS 2003
... 6 tip mach probes measure plasma flow speed and direction on a magnetic surface. 2 similar probes are used to simultaneously measure the flow at high and low field locations, both on the outboard side of the torus. Data is analyzed using the unmagnetized model by Hutchinson. ...
... 6 tip mach probes measure plasma flow speed and direction on a magnetic surface. 2 similar probes are used to simultaneously measure the flow at high and low field locations, both on the outboard side of the torus. Data is analyzed using the unmagnetized model by Hutchinson. ...
Laboratory Astrophysics: Spectral Analysis of Photoionized Neon
... distribution. Increasing the temperature of a Maxwellian gas makes fv favor larger velocities, so the integral of fv v increases with temperature (see Figure 1.2). This also means that small temperatures can render collisional ionization negligible relative to photoionization so long as the density ...
... distribution. Increasing the temperature of a Maxwellian gas makes fv favor larger velocities, so the integral of fv v increases with temperature (see Figure 1.2). This also means that small temperatures can render collisional ionization negligible relative to photoionization so long as the density ...
Effects of magnetic field gradient on cylindrical hall ion source
... magnetic gradient in the discharge channel, thereby making a large number of axial electrons flowing upstream to the gas distributor but resulting in low ionization efficiency of atomic particles in the discharge region. ...
... magnetic gradient in the discharge channel, thereby making a large number of axial electrons flowing upstream to the gas distributor but resulting in low ionization efficiency of atomic particles in the discharge region. ...
Electron Firehose instability and acceleration of electrons in solar
... moving MHD waves. Due to a slight overplus in head-on collisions the interaction results in an energy gain for the particle. As in the shock acceleration model, the acceleration by MHD turbulence suffers from an ’injection problem’: Thermal ions and electrons cannot resonate with MHD waves for typic ...
... moving MHD waves. Due to a slight overplus in head-on collisions the interaction results in an energy gain for the particle. As in the shock acceleration model, the acceleration by MHD turbulence suffers from an ’injection problem’: Thermal ions and electrons cannot resonate with MHD waves for typic ...
Laboratory Astrophysics: Spectral Analysis of Photoionized Neon J ames MacArthur
... depends on the product of the ion and electron densities) and a larger electron velocity increases the energy and collisional frequency. Collisionally ionized plasmas are common in the earth and throughout the universe. Planetary cores, stars, stellar coronae, and black hole accretion disks are just ...
... depends on the product of the ion and electron densities) and a larger electron velocity increases the energy and collisional frequency. Collisionally ionized plasmas are common in the earth and throughout the universe. Planetary cores, stars, stellar coronae, and black hole accretion disks are just ...
WEAK ION SOUND TURBULENCE AND ISOTOPE ANOMALY
... ions resident time in the plasma and consequently better output of higher charged heavy ions. Therefore a small deviation in the temperatures of various ions could result in an essential difference in the extracted currents. As it was mentioned above the authors of Ref. [8] explain the “isotope effe ...
... ions resident time in the plasma and consequently better output of higher charged heavy ions. Therefore a small deviation in the temperatures of various ions could result in an essential difference in the extracted currents. As it was mentioned above the authors of Ref. [8] explain the “isotope effe ...
Equatorially trapped plasmas and parallel electric fields
... and 0.9 eV, for the two energy ranges noted above. This gives a temperature ratio of 42 for the central portion of the ion distribution. The isotropic background ought to be included in the energy analysis of the 90° pitch angle data (Figure 1), but a plot of the inferred isotropic background distri ...
... and 0.9 eV, for the two energy ranges noted above. This gives a temperature ratio of 42 for the central portion of the ion distribution. The isotropic background ought to be included in the energy analysis of the 90° pitch angle data (Figure 1), but a plot of the inferred isotropic background distri ...
Thermal Bremsstrahlung - Ira-Inaf
... However, a classical treatment is justified in some regimes, and the formulas so obtained have the correct functional dependence for most of the physical parameters. Therefore, we first give a classical treatment and then state the quantum results as corrections (Gaunt factors) to the classical form ...
... However, a classical treatment is justified in some regimes, and the formulas so obtained have the correct functional dependence for most of the physical parameters. Therefore, we first give a classical treatment and then state the quantum results as corrections (Gaunt factors) to the classical form ...
Electron Density and Energy Distributions in the
... by photons emitted during the de-excitation process in the plasma region sustain the discharge. The ionization region is uniform along the wire surface and appears as a weak bluish glow. Negative coronas are non-uniform and the mechanisms for generation differ from those described for a positive cor ...
... by photons emitted during the de-excitation process in the plasma region sustain the discharge. The ionization region is uniform along the wire surface and appears as a weak bluish glow. Negative coronas are non-uniform and the mechanisms for generation differ from those described for a positive cor ...
Fundamentals of High Power Impulse Magnetron Sputtering
... species is desired. If the growth species are ionized this can be achieved by the use of a substrate bias or a magnetic field. Ions may be accelerated by an applied potential, whereas neutral particles may not. Thin films grown by ionized physical vapor deposition (I-PVD) have lately shown promising ...
... species is desired. If the growth species are ionized this can be achieved by the use of a substrate bias or a magnetic field. Ions may be accelerated by an applied potential, whereas neutral particles may not. Thin films grown by ionized physical vapor deposition (I-PVD) have lately shown promising ...
Samir et al 1983 Expansion of plasma into a vacuum The moon
... $amir and Fontheim [1981] performed a comparaPhenomenainvolved in the expansionof a plasma into a vacuum,particularlyion accelerationand rarefactionwave tive theory-experimentstudy of the ion and electron distripropagation,were studiedboth theoreticallyand to a lesser bution in the wakes of the Atmo ...
... $amir and Fontheim [1981] performed a comparaPhenomenainvolved in the expansionof a plasma into a vacuum,particularlyion accelerationand rarefactionwave tive theory-experimentstudy of the ion and electron distripropagation,were studiedboth theoreticallyand to a lesser bution in the wakes of the Atmo ...
8th lecture Stationary fields direct current
... steady state is achieved, when the inflow and the outflow are equal thus the water level does not change any more. This is the so called stationary state. ...
... steady state is achieved, when the inflow and the outflow are equal thus the water level does not change any more. This is the so called stationary state. ...
Plasma (physics)
Plasma (from Greek πλάσμα, ""anything formed"") is one of the four fundamental states of matter, the others being solid, liquid, and gas. A plasma has properties unlike those of the other states.A plasma can be created by heating a gas or subjecting it to a strong electromagnetic field applied with a laser or microwave generator. This decreases or increases the number of electrons, creating positive or negative charged particles called ions, and is accompanied by the dissociation of molecular bonds, if present.The presence of a significant number of charge carriers makes plasma electrically conductive so that it responds strongly to electromagnetic fields. Like gas, plasma does not have a definite shape or a definite volume unless enclosed in a container. Unlike gas, under the influence of a magnetic field, it may form structures such as filaments, beams and double layers.Plasma is the most abundant form of ordinary matter in the Universe (the only matter known to exist for sure, the more abundant dark matter is hypothetical and may or may not be explained by ordinary matter), most of which is in the rarefied intergalactic regions, particularly the intracluster medium, and in stars, including the Sun. A common form of plasmas on Earth is seen in neon signs.Much of the understanding of plasmas has come from the pursuit of controlled nuclear fusion and fusion power, for which plasma physics provides the scientific basis.