Modeling of Intense Laser Driven High Energy Density Plasmas
... Illuminating matter with petawatt (one quadrillion watts) laser light creates extreme states of plasmas with temperatures exceeding ten million degrees Celsius and pressures exceeding one billion earth atmospheres. These high energy density conditions are driven at the microscopic scale by dense cur ...
... Illuminating matter with petawatt (one quadrillion watts) laser light creates extreme states of plasmas with temperatures exceeding ten million degrees Celsius and pressures exceeding one billion earth atmospheres. These high energy density conditions are driven at the microscopic scale by dense cur ...
DEPOLARIZATION OF RADIO BURSTS DUE TO REFLECTION OFF
... Depolarization of solar radio bursts requires reflection off boundary layers no thicker than about a wavelength (a few meters at most) between regions with large density ratios. The implied inhomogeneities suggest that the corona is much more highly and sharply structured than can be resolved from o ...
... Depolarization of solar radio bursts requires reflection off boundary layers no thicker than about a wavelength (a few meters at most) between regions with large density ratios. The implied inhomogeneities suggest that the corona is much more highly and sharply structured than can be resolved from o ...
Flare Observations
... at 100 MeV. This review focuses on recent observations in EUV, soft and hard X-rays, white light, and radio waves. Space missions such as RHESSI, Yohkoh, TRACE, and SOHO have enlarged widely the observational base. They have revealed a number of surprises: Coronal sources appear before the hard X-ra ...
... at 100 MeV. This review focuses on recent observations in EUV, soft and hard X-rays, white light, and radio waves. Space missions such as RHESSI, Yohkoh, TRACE, and SOHO have enlarged widely the observational base. They have revealed a number of surprises: Coronal sources appear before the hard X-ra ...
THE SPECIFIC ACCELERATION RATE IN LOOP
... effects. However, since Lu (E) is equal to the square root of a ratio of integrals, the results do not depend significantly on the values of the s-integration limits used. The forms of Equations (2) and (3) do not result in a closed analytic form for Lu (E) (see Equation (1)), and so a straightforwa ...
... effects. However, since Lu (E) is equal to the square root of a ratio of integrals, the results do not depend significantly on the values of the s-integration limits used. The forms of Equations (2) and (3) do not result in a closed analytic form for Lu (E) (see Equation (1)), and so a straightforwa ...
bob_neutrino_EPS04
... problem. Neutrino interactions with matter are usually considered as non self-consistent single particle processes. We describe neutrino streaming instabilities within supernovæ plasmas, resulting in longitudinal and transverse waves using coupled kinetic equations for both neutrinos and plasma part ...
... problem. Neutrino interactions with matter are usually considered as non self-consistent single particle processes. We describe neutrino streaming instabilities within supernovæ plasmas, resulting in longitudinal and transverse waves using coupled kinetic equations for both neutrinos and plasma part ...
No Slide Title
... between high energy cosmic rays in the upper atmosphere can create pions. These pions decay into muons which decay into electrons. These decays produce twice as many muon neutrinos as electron neutrinos. However, underground detectors sensitive to both types of neutrinos see a much smaller ration th ...
... between high energy cosmic rays in the upper atmosphere can create pions. These pions decay into muons which decay into electrons. These decays produce twice as many muon neutrinos as electron neutrinos. However, underground detectors sensitive to both types of neutrinos see a much smaller ration th ...
Inhomogeneous cloud coverage through the Coulomb explosion of
... A plasma is defined as a quasineutral gas of charged and neutral particles which exhibit collective behaviour (Chen 1984). Locally, the entirety of the gas does not need to be ionized for it to behave as a plasma. As long as the collective, long-range electromagnetic influence of the many distant ch ...
... A plasma is defined as a quasineutral gas of charged and neutral particles which exhibit collective behaviour (Chen 1984). Locally, the entirety of the gas does not need to be ionized for it to behave as a plasma. As long as the collective, long-range electromagnetic influence of the many distant ch ...
III Ionized Hydrogen (HII) Regions
... gaseous nebulae are very different, the physics governing them is basically the same. We will refer to all of these as “HII Regions” generically in this section. The UV, visible and IR spectra of HII regions are very rich in emission lines, primarily collisionally excited lines of metal ions and rec ...
... gaseous nebulae are very different, the physics governing them is basically the same. We will refer to all of these as “HII Regions” generically in this section. The UV, visible and IR spectra of HII regions are very rich in emission lines, primarily collisionally excited lines of metal ions and rec ...
スライド 1
... Looking down onto the ecliptic plane from above, a CIR near Earth's orbit is sketched. The Sun is off the bottom of the figure. The CIR is shaded in tan, and the Earth's track through the CIR is depicted as the green dashed line. In the reference frame of this sketch, the Earth moves downward with t ...
... Looking down onto the ecliptic plane from above, a CIR near Earth's orbit is sketched. The Sun is off the bottom of the figure. The CIR is shaded in tan, and the Earth's track through the CIR is depicted as the green dashed line. In the reference frame of this sketch, the Earth moves downward with t ...
Coronal energy input and dissipation in a solar active region 3D
... increased above the crossing point of Ohmic and viscous heating compared to the full box FOV, while it is slightly decreased below this crossing point. In contrast to the restricted FOV, the global mean viscous heating profile has a rather constant scale height above 20 Mm. This behavior of the visc ...
... increased above the crossing point of Ohmic and viscous heating compared to the full box FOV, while it is slightly decreased below this crossing point. In contrast to the restricted FOV, the global mean viscous heating profile has a rather constant scale height above 20 Mm. This behavior of the visc ...
Low-Energy Electron-Induced Chemistry of
... which methanol, a precursor of several prebiotic species, is the most abundant organic species. Using post-irradiation temperature-programmed desorption, we have investigated the radiolysis initiated by low-energy (7 eV and 20 eV) electrons in condensed methanol at ~ 85 K under ultrahigh vacuum (5×1 ...
... which methanol, a precursor of several prebiotic species, is the most abundant organic species. Using post-irradiation temperature-programmed desorption, we have investigated the radiolysis initiated by low-energy (7 eV and 20 eV) electrons in condensed methanol at ~ 85 K under ultrahigh vacuum (5×1 ...
The Negative Ion of Hydrogen A. R. P. Rau
... The astrophysical importance of the existence of a weakly bound H– was first recorded in the literature by Wildt (1939, 1941). The abundant presence of both hydrogen and low energy electrons in the ionized atmospheres of the Sun and other stars argues for the formation of H– by electron attachment. ...
... The astrophysical importance of the existence of a weakly bound H– was first recorded in the literature by Wildt (1939, 1941). The abundant presence of both hydrogen and low energy electrons in the ionized atmospheres of the Sun and other stars argues for the formation of H– by electron attachment. ...
Slides
... (AGN) is a compact region at the center of a galaxy which has a much higher than normal luminosity over some or all of the electromagnetic spectrum. The radiation from AGN is believed to be a result of accretion on to a super-massive black hole at the centre of the host galaxy.” -Wikipedia ...
... (AGN) is a compact region at the center of a galaxy which has a much higher than normal luminosity over some or all of the electromagnetic spectrum. The radiation from AGN is believed to be a result of accretion on to a super-massive black hole at the centre of the host galaxy.” -Wikipedia ...
A single picture for solar coronal outflows and radio noise storms
... in association with quiescent solar active regions. Our interpretation is based on multi-wavelength observations of two such regions as they crossed the meridian in May and July 2007. For both regions, we observe a persistent pattern of blue-shifted coronal emission in high-temperature lines with Hi ...
... in association with quiescent solar active regions. Our interpretation is based on multi-wavelength observations of two such regions as they crossed the meridian in May and July 2007. For both regions, we observe a persistent pattern of blue-shifted coronal emission in high-temperature lines with Hi ...
Laboratory Astrophysics: Spectral Analysis of Photoionized Neon
... Figure 1.1: Approximate ionization energies for neon atoms in the ground state [1]. The large jump in ionization energy occurs because the electrons in Ne IX and Ne X must be ionized from the 1s level. The increasing trend towards higher ionization energies is a consequence of shielding electrons be ...
... Figure 1.1: Approximate ionization energies for neon atoms in the ground state [1]. The large jump in ionization energy occurs because the electrons in Ne IX and Ne X must be ionized from the 1s level. The increasing trend towards higher ionization energies is a consequence of shielding electrons be ...
Abstract: - Laboratory for Atmospheric and Space Physics
... the centrifugal force of the rotating cold plasma does not distort it greatly, the azimuthal current ...
... the centrifugal force of the rotating cold plasma does not distort it greatly, the azimuthal current ...
БЕЗОТРАЖАТЕЛЬНОЕ ПРОХОЖДЕНИЕ ВОЛНЫ ЧЕР
... with inhomogeneous dielectrics including plasmas. In particular, it is important to realize the electromagnetic radiation tunneling through gradient wave barriers in the problem of dense plasma heating up to very high temperatures, to transilluminate opaque plasma layers in the communication tasks a ...
... with inhomogeneous dielectrics including plasmas. In particular, it is important to realize the electromagnetic radiation tunneling through gradient wave barriers in the problem of dense plasma heating up to very high temperatures, to transilluminate opaque plasma layers in the communication tasks a ...
Laboratory Astrophysics: Spectral Analysis of Photoionized Neon J ames MacArthur
... Another classic astrophysical situation where photoionization plays a dominant role is the cone of photoionized plasma perpendicular to the plane of a Seyfert galaxy (see Figure 1.4). A Seyfert galaxy has broad emission or absorption lines from highly ionized plasmas. Seyfert 1 galaxies have both ab ...
... Another classic astrophysical situation where photoionization plays a dominant role is the cone of photoionized plasma perpendicular to the plane of a Seyfert galaxy (see Figure 1.4). A Seyfert galaxy has broad emission or absorption lines from highly ionized plasmas. Seyfert 1 galaxies have both ab ...
Absorption of high-energy gamma rays in Cygnus X-3
... corresponding to the case where the compact object is a neutron star (Mco = 1.4 M ) orbiting a 5 M Wolf-Rayet star. At the other end, the inclination is i = 30◦ and corresponds to a 20 M black hole and a 50 M Wolf-Rayet star companion. These two cases also represent two extreme solutions in term ...
... corresponding to the case where the compact object is a neutron star (Mco = 1.4 M ) orbiting a 5 M Wolf-Rayet star. At the other end, the inclination is i = 30◦ and corresponds to a 20 M black hole and a 50 M Wolf-Rayet star companion. These two cases also represent two extreme solutions in term ...
UAH
... UAH Double Layers & High Potential • The separation of charge leads to voltages proportional to the energy of the ions. • Ionospheric electrons would neutralize the ions, but for gradient B drifts. • Energy is conserved, but this geometry acts as a transformer, producing parallel fields • It should ...
... UAH Double Layers & High Potential • The separation of charge leads to voltages proportional to the energy of the ions. • Ionospheric electrons would neutralize the ions, but for gradient B drifts. • Energy is conserved, but this geometry acts as a transformer, producing parallel fields • It should ...
plasma/tokamak (alex/steve)new - General Atomics Fusion Education
... One of the uses for higher energy plasma is for etching microprocessor chips. The high velocity and small size of the atoms are used to bombard chip surfaces to remove material between microscopic conductors. Synthetic diamonds are also produced by laying down carbon atoms in a diamond lattice struc ...
... One of the uses for higher energy plasma is for etching microprocessor chips. The high velocity and small size of the atoms are used to bombard chip surfaces to remove material between microscopic conductors. Synthetic diamonds are also produced by laying down carbon atoms in a diamond lattice struc ...
IRIS observations of the solar transition region
... The lifetime of individual “strands,” or loops, that maintain plasma in the temperature range required for emission in the Si IV line is a few hundred seconds or less. Both of these properties are very similar to what is observed. However, Doppler velocities measured at the origin of the line profil ...
... The lifetime of individual “strands,” or loops, that maintain plasma in the temperature range required for emission in the Si IV line is a few hundred seconds or less. Both of these properties are very similar to what is observed. However, Doppler velocities measured at the origin of the line profil ...
The energetics of relativistic magnetic reconnection: ion
... of strong motional electric fields, particles can gain energy there without necessarily turning around the whole island. Liu et al. (2011) report that in their relativistic pair plasma simulations, most particles are energized in this way. Jaroschek et al. (2004) also find that this scenario is impo ...
... of strong motional electric fields, particles can gain energy there without necessarily turning around the whole island. Liu et al. (2011) report that in their relativistic pair plasma simulations, most particles are energized in this way. Jaroschek et al. (2004) also find that this scenario is impo ...
MHD seismology as a tool to diagnose the coronae of X
... turbances may also trigger the fast magnetoacoustic waves (e.g., kink, sausage) in the nearby stellar loops similar to the oscillations of coronal loops (e.g., Srivastava et al. 2008; Aschwanden & Schrijver 2011, and references cited therein). The longitudinal sausage oscillations can directly modif ...
... turbances may also trigger the fast magnetoacoustic waves (e.g., kink, sausage) in the nearby stellar loops similar to the oscillations of coronal loops (e.g., Srivastava et al. 2008; Aschwanden & Schrijver 2011, and references cited therein). The longitudinal sausage oscillations can directly modif ...
magnetospheres of the outer planets
... molecules in the shape of a torus (doughnut) forms around lo's orbit. These sulfur and oxygen neutral clouds have been observed by earth-based optical and ultraviolet spectrometers. The average atomic oxygen density in the neutral clouds is about 30 atoms per cubic centimeter. Once neutral gas cloud ...
... molecules in the shape of a torus (doughnut) forms around lo's orbit. These sulfur and oxygen neutral clouds have been observed by earth-based optical and ultraviolet spectrometers. The average atomic oxygen density in the neutral clouds is about 30 atoms per cubic centimeter. Once neutral gas cloud ...
Corona discharge
In electricity, a corona discharge is an electrical discharge brought on by the ionization of a fluid surrounding a conductor that is electrically charged. Spontaneous corona discharges occur naturally in high-voltage systems unless care is taken to limit the electric field strength. The corona will occur when the strength (potential gradient) of the electric field around a conductor is high enough to form a conductive region, but not high enough to cause electrical breakdown or arcing to nearby objects. It is often seen as a bluish (or other color) glow in the air adjacent to pointed metal conductors carrying high voltages, and emits light by the same property as a gas discharge lamp. The ionized gas of a corona is chemically active. In air, this generates gases such as ozone (O3) and nitrogen oxide (NO), and in turn nitric oxide (NO2), and thus nitric acid if water vapor is present. Ozone is intentionally created this way in an ozone generator, otherwise, these highly corrosive substances are objectionable or hazardous, and are undesirable where they waste power in electrical systems. Controlled corona discharges are used in a variety of filtration, printing, and other processes.