ppt - SLAC
... • Must find a mechanism to convert the “bulk flow” of the jet (Gj ~ 10) to “random motion” of electrons (gel ~ thousands) ...
... • Must find a mechanism to convert the “bulk flow” of the jet (Gj ~ 10) to “random motion” of electrons (gel ~ thousands) ...
Generation of highly energetic electrons at
... Context. During solar flares a large amount of energy is suddenly released and partly transfered into energetic electrons. They are of special interest since a substantial part of the energy released during a flare is deposited into the energetic electrons. RHESSI observations, e.g. of the solar eve ...
... Context. During solar flares a large amount of energy is suddenly released and partly transfered into energetic electrons. They are of special interest since a substantial part of the energy released during a flare is deposited into the energetic electrons. RHESSI observations, e.g. of the solar eve ...
Sun Physics
... Large flares are often associated with huge ejections of mass from the Sun. Solar plasma is heated to tens of millions of degrees, and electrons, protons, and heavy nuclei are accelerated to near the speed of light. The super-heated electrons from CMEs move along the magnetic field lines faster than ...
... Large flares are often associated with huge ejections of mass from the Sun. Solar plasma is heated to tens of millions of degrees, and electrons, protons, and heavy nuclei are accelerated to near the speed of light. The super-heated electrons from CMEs move along the magnetic field lines faster than ...
M.Ishida_Future_HE_Mission2006 - X
... Accretion onto WD takes place through an optically thick Keplerian disc (T~105K). Hard X-rays are radiated from the Boundary Layer which is optically thin/geometrically thick with T~108K. The rotation speed of WD at its surface is usually much smaller than vK(R*) (~5000km/s). For settling do ...
... Accretion onto WD takes place through an optically thick Keplerian disc (T~105K). Hard X-rays are radiated from the Boundary Layer which is optically thin/geometrically thick with T~108K. The rotation speed of WD at its surface is usually much smaller than vK(R*) (~5000km/s). For settling do ...
Modelling Protogalactic Collapse and Magnetic Field Evolution with FLASH Protogalaxy Results Introduction
... A bow shock simulation shows that the vorticity generation is accurate to about 30% ...
... A bow shock simulation shows that the vorticity generation is accurate to about 30% ...
MAGNETIC FORCE ON AN ELECTRIC CHARGE
... excited atoms then loss their excess energy by emitting electromagnetic radiation mainly in the visible part of the spectrum (figure 8). ...
... excited atoms then loss their excess energy by emitting electromagnetic radiation mainly in the visible part of the spectrum (figure 8). ...
E sporadico Winds Shear e forza di Lorentz english
... collisions cause the transformation of their kinetic energy into heat energy, consequently we have their vaporization and ionization The gas present in these areas, has been enriched with metal ions and their electrons. In the case of pressure differences, all the component particles move like the w ...
... collisions cause the transformation of their kinetic energy into heat energy, consequently we have their vaporization and ionization The gas present in these areas, has been enriched with metal ions and their electrons. In the case of pressure differences, all the component particles move like the w ...
Solar Surface Magneto-Convection
... Long time scale (how long?) Seed field from dispersal of active regions dependence on solar cycle ...
... Long time scale (how long?) Seed field from dispersal of active regions dependence on solar cycle ...
Document
... – Passes through matter very easily, and so is hard to detect. – Neutrino measurements on Earth confirm our models of fusion in the Sun’s core. ...
... – Passes through matter very easily, and so is hard to detect. – Neutrino measurements on Earth confirm our models of fusion in the Sun’s core. ...
File
... E energy produced m mass or amount of matter that is changed c2 speed of light What is the speed of light? 300,000 km /s How much hydrogen does the sun convert into helium every second? 600 million tons of hydrogen into helium every second ...
... E energy produced m mass or amount of matter that is changed c2 speed of light What is the speed of light? 300,000 km /s How much hydrogen does the sun convert into helium every second? 600 million tons of hydrogen into helium every second ...
Lecture 2/10 The Sun Ulf Torkelsson 1 The internal structure of the
... most obvious of these are the sun spots. Sun spots are dark regions with a temperature that is a 1000 K lower than the rest of the photosphere. These sunspots have strong magnetic fields on the order of 0.1 T. The reason that the sun spots are cooler appears to be that the magnetic field is suppress ...
... most obvious of these are the sun spots. Sun spots are dark regions with a temperature that is a 1000 K lower than the rest of the photosphere. These sunspots have strong magnetic fields on the order of 0.1 T. The reason that the sun spots are cooler appears to be that the magnetic field is suppress ...
Слайд 1 - SPACE RESEARCH at FMI
... The Five IHY Science Themes: Theme 1: Evolution and Generation of Magnetic Structures and Transients Theme 2: Energy Transfer and Coupling Processes Theme 3: Flows and Circulations Theme 4: Boundaries and Interfaces Theme 5: Synoptic Studies of the 3-D Coupled SolarPlanetary-Heliospheric System The ...
... The Five IHY Science Themes: Theme 1: Evolution and Generation of Magnetic Structures and Transients Theme 2: Energy Transfer and Coupling Processes Theme 3: Flows and Circulations Theme 4: Boundaries and Interfaces Theme 5: Synoptic Studies of the 3-D Coupled SolarPlanetary-Heliospheric System The ...
THE SUN - rgreenbergscience
... All of the Sun is gas 70% Hydrogen, 20% helium and 2% heavier elements Sun is a madhouse of electromagnetic activity On the Sun, almost everything is electrically conductive because there aren’t very many intact neutral atoms Overwhelming thermal and radiation energies excite electrons to the point ...
... All of the Sun is gas 70% Hydrogen, 20% helium and 2% heavier elements Sun is a madhouse of electromagnetic activity On the Sun, almost everything is electrically conductive because there aren’t very many intact neutral atoms Overwhelming thermal and radiation energies excite electrons to the point ...
Stellar Evolution
... planetary nebulae are produced by the expansion of a ‘fast stellar wind’ within a slowly expanding ’cloud’ which is denser near its equator than its poles.” • If so, where do the x-rays come from? ...
... planetary nebulae are produced by the expansion of a ‘fast stellar wind’ within a slowly expanding ’cloud’ which is denser near its equator than its poles.” • If so, where do the x-rays come from? ...
sources of hard and soft x-ray emission in solar flares: mhd simulation
... The model is based on the observations and on the results of numerical magnetohydrodynamical simulations. At the numerical simulations it is not used any assumptions about the solar flare. All initial and boundary conditions are taken from the observations. To stabilize numerical instabilities the s ...
... The model is based on the observations and on the results of numerical magnetohydrodynamical simulations. At the numerical simulations it is not used any assumptions about the solar flare. All initial and boundary conditions are taken from the observations. To stabilize numerical instabilities the s ...
슬라이드 1
... ⇒ Transition rate increases s = +1 → s = - 1 Level difference becomes large ⇒ Transition energy becomes small ⇒ Different to free space kinematics ⇒ Transition rate decreases ...
... ⇒ Transition rate increases s = +1 → s = - 1 Level difference becomes large ⇒ Transition energy becomes small ⇒ Different to free space kinematics ⇒ Transition rate decreases ...
intro - Big Bear Solar Observatory
... 1.In all of the cases we found a peak in , which was followed by a peak in . During the time interval between them, , a rapid growth of the soft X-ray and H flux occurred. 2.The peak in beta was preceded by a period of gradual growth of , . Maximum in occurred earlier than the peak of t ...
... 1.In all of the cases we found a peak in , which was followed by a peak in . During the time interval between them, , a rapid growth of the soft X-ray and H flux occurred. 2.The peak in beta was preceded by a period of gradual growth of , . Maximum in occurred earlier than the peak of t ...
6.2 Atomic Nucleus Stability and Isotopes
... binding energy per nucleon and/or increases the repulsive force. Fission produces less energy than fusion. Both processes produce energy by converting energy from mass by E=mc2. ...
... binding energy per nucleon and/or increases the repulsive force. Fission produces less energy than fusion. Both processes produce energy by converting energy from mass by E=mc2. ...
Simulations and radiative diagnostics of turbulence and waves in
... • 12x12x1.4 Mm domain resolved by 480x480x100 grid cells. • Self-consistent. Only few parameters are required: Mtot, Fsun, g, and chemical composition. • Initial stratification is from Spruit model. • Uniform magnetic field is introduced after convection has developed ...
... • 12x12x1.4 Mm domain resolved by 480x480x100 grid cells. • Self-consistent. Only few parameters are required: Mtot, Fsun, g, and chemical composition. • Initial stratification is from Spruit model. • Uniform magnetic field is introduced after convection has developed ...
Lecture 17
... The order of magnitude of kF is the reciprocal of the interparticle spacing. The corresponding Fermi energy εF = h̄2 kF2 /2m is of order the zero point energy of a particle confined to this scale. This is typically a large energy, e.g. 104 K for electrons in a metal. Note that εF ∝ (N/V )2/3 so that ...
... The order of magnitude of kF is the reciprocal of the interparticle spacing. The corresponding Fermi energy εF = h̄2 kF2 /2m is of order the zero point energy of a particle confined to this scale. This is typically a large energy, e.g. 104 K for electrons in a metal. Note that εF ∝ (N/V )2/3 so that ...
Why can the sun persistently produce energy for the stable output of
... 6. Is the entire sun undergoing nuclear fusion? The sun is a huge volume of gas and its total mass is very great. As a result of gravitational force, the pressure will be greater when it is closer to the center of the sun. Therefore, the solar core is a highly compressed region in which nuclear fu ...
... 6. Is the entire sun undergoing nuclear fusion? The sun is a huge volume of gas and its total mass is very great. As a result of gravitational force, the pressure will be greater when it is closer to the center of the sun. Therefore, the solar core is a highly compressed region in which nuclear fu ...
Worksheet 4.2 (Answer Key)
... 3. How do the density and temperature of the Sun vary from the center outward.? The Sun is very dense at its core, and the density steadily decreases out toward its surface, where it is less dense than Earth’s atmosphere. It continues to decrease out into the corona where the density is about 1 part ...
... 3. How do the density and temperature of the Sun vary from the center outward.? The Sun is very dense at its core, and the density steadily decreases out toward its surface, where it is less dense than Earth’s atmosphere. It continues to decrease out into the corona where the density is about 1 part ...
Fusion: A true challenge for an enormous reward
... all particles to the outside, irrespective of their charge. Without special measures, it is thus impossible to confine a toroidal plasma in a stable way. However, if the magnetic field can be given an extra twist, vertical drifts can be cancelled and a suitable trap can be made for fusion plasmas. Thi ...
... all particles to the outside, irrespective of their charge. Without special measures, it is thus impossible to confine a toroidal plasma in a stable way. However, if the magnetic field can be given an extra twist, vertical drifts can be cancelled and a suitable trap can be made for fusion plasmas. Thi ...
Twin-Double Layer Structure Producing Tailward Ion
... This paper investigates the generation, expansion, propagation and distribution of anti-sunward plasma ion jets and energetic particle populations in the nightside magnetosphere. An electrical circuit model with passive components is defined to set up a new twin-double layer (DL) entity in the near ...
... This paper investigates the generation, expansion, propagation and distribution of anti-sunward plasma ion jets and energetic particle populations in the nightside magnetosphere. An electrical circuit model with passive components is defined to set up a new twin-double layer (DL) entity in the near ...
The Virial Theorem, MHD Equilibria, and Force
... These lecture notes are largely based on Plasma Physics for Astrophysics by Russell Kulsrud, Lectures in Magnetohydrodynamics by the late Dalton Schnack, Ideal Magnetohydrodynamics by Jeffrey Freidberg, Hydrodynamic and Hydromagnetic Stability by S. Chandrasekhar, Classical Electrodynamics by J. Jac ...
... These lecture notes are largely based on Plasma Physics for Astrophysics by Russell Kulsrud, Lectures in Magnetohydrodynamics by the late Dalton Schnack, Ideal Magnetohydrodynamics by Jeffrey Freidberg, Hydrodynamic and Hydromagnetic Stability by S. Chandrasekhar, Classical Electrodynamics by J. Jac ...
Polywell
The polywell is a type of nuclear fusion reactor that uses an electric field to heat ions to fusion conditions. It is closely related to the magnetic mirror, the fusor, the biconic cusp and the high beta fusion reactor. A set of electromagnets generates a magnetic field which traps electrons. This creates a negative voltage, which attracts positive ions. As the ions accelerate towards the negative center, their kinetic energy rises. If the ions collide in the center, they can fuse.The polywell is one of many devices that use an electric field to heat ions to fusion conditions. This branch of fusion research is known as inertial electrostatic confinement. The polywell was developed by Robert Bussard, as an improvement over the fusor. His company, EMC2, Inc., developed the initial devices for the U.S. Navy.