regan-kent-25nov09a
... • Once we have made 12C (Z=6) nuclei can fuse together and gain energy (if the star is hot and massive enough) to make all elements up to Z=26 (Iron=Fe). ...
... • Once we have made 12C (Z=6) nuclei can fuse together and gain energy (if the star is hot and massive enough) to make all elements up to Z=26 (Iron=Fe). ...
Astronomy – Name: ______KEY___________________ Date
... 16. Which areas of latitude on the sun rotate the fastest? The higher latitudes rotate faster 17. How does this uneven rotation periodically affect the poles? Periodically the poles reverse. 18. How old is the sun? Approx. 4 BYO. 19. How can astronomers observe the different elements found in the su ...
... 16. Which areas of latitude on the sun rotate the fastest? The higher latitudes rotate faster 17. How does this uneven rotation periodically affect the poles? Periodically the poles reverse. 18. How old is the sun? Approx. 4 BYO. 19. How can astronomers observe the different elements found in the su ...
The Sun - www .alexandria .k12 .mn .us
... • A star is ‘powered’ by nuclear fusion reactions in its core. • Nuclear fusion involves light atomic nuclei fusing together to form heavier ones. • This process releases huge amounts of energy - each second, the Sun produces 4 x 1026 joules of energy! • It would take 2000 million nuclear power plan ...
... • A star is ‘powered’ by nuclear fusion reactions in its core. • Nuclear fusion involves light atomic nuclei fusing together to form heavier ones. • This process releases huge amounts of energy - each second, the Sun produces 4 x 1026 joules of energy! • It would take 2000 million nuclear power plan ...
5.14 The magnetospheric ring current. The largest component of the
... The solar wind injects charged particles into the ring current, mainly positively charged oxygen ions. Sudden increases in the solar wind associated with coronal mass ejections cause magnetic storms (Figure 5.28), characterized by a sudden commencement, a small but sharp increase in the magnetic fie ...
... The solar wind injects charged particles into the ring current, mainly positively charged oxygen ions. Sudden increases in the solar wind associated with coronal mass ejections cause magnetic storms (Figure 5.28), characterized by a sudden commencement, a small but sharp increase in the magnetic fie ...
PowerPoint - Astronomy at Swarthmore College
... Figure 4 - Phase-folded light curves of 1 Ori C. Open circles represent the excess C IV 1548, 1551 Å equivalent width (left axis) taken from Walborn & Nichols (1994) and phased to the ephemeris of Stahl et al. (1996) with period 15.422 days and MJD0 = 48832.50. Maximum C IV absorption occurs near p ...
... Figure 4 - Phase-folded light curves of 1 Ori C. Open circles represent the excess C IV 1548, 1551 Å equivalent width (left axis) taken from Walborn & Nichols (1994) and phased to the ephemeris of Stahl et al. (1996) with period 15.422 days and MJD0 = 48832.50. Maximum C IV absorption occurs near p ...
doc
... magnetic field is frozen into both wind and disk. We assume that vwind is independent of position. The following analysis could be adapted to more complicated configurations. Suppose that a sudden energy release occurs near the centre of the accretion disk and that much of this energy is converted i ...
... magnetic field is frozen into both wind and disk. We assume that vwind is independent of position. The following analysis could be adapted to more complicated configurations. Suppose that a sudden energy release occurs near the centre of the accretion disk and that much of this energy is converted i ...
Talk - Frontiers in Computational Astrophysics
... • Reconnection simulations for additional acceleration mechanism including magnetic reconnection • Non-relativistic jet simulations for understanding SNRs ...
... • Reconnection simulations for additional acceleration mechanism including magnetic reconnection • Non-relativistic jet simulations for understanding SNRs ...
The Sun abbreviated
... At last, we reach the core… The core is where the Sun’s energy is made! The core is so hot and has such ...
... At last, we reach the core… The core is where the Sun’s energy is made! The core is so hot and has such ...
Fusion: Our Friend the Nucleus
... the conservation of blocks! This goes on for a few days, and then one day when she comes in there are only 27 blocks. However, she finds one block lying outside the window … Suppose one day when the mother comes to count the blocks she finds that there are only 25 blocks, but suspects that the child ...
... the conservation of blocks! This goes on for a few days, and then one day when she comes in there are only 27 blocks. However, she finds one block lying outside the window … Suppose one day when the mother comes to count the blocks she finds that there are only 25 blocks, but suspects that the child ...
Book 2, Chapter 1 - Magnetism – Quizzes Quiz 1 and 2 – label the
... 6. __________________________________ are the lines that map out the magnetic field around a magnet. 7. A(n) _________________________________ is any material that attracts iron and materials that contain iron. 8. The attraction or repulsion between magnetic poles is ________________________________ ...
... 6. __________________________________ are the lines that map out the magnetic field around a magnet. 7. A(n) _________________________________ is any material that attracts iron and materials that contain iron. 8. The attraction or repulsion between magnetic poles is ________________________________ ...
High-Energy Astrophysics
... The notion that the space between galaxies in a cluster must be filled with some material which gravitates but does not emit light (at least, in the optical) was first proposed by Zwicky in the 1930’s. His observations showed that the orbital speeds of galaxies in nearby clusters were too great for ...
... The notion that the space between galaxies in a cluster must be filled with some material which gravitates but does not emit light (at least, in the optical) was first proposed by Zwicky in the 1930’s. His observations showed that the orbital speeds of galaxies in nearby clusters were too great for ...
Different wavelengths…
... A coronagraph uses a telescope with a piece blocking the sun, so that the corona can be observed at any time. In effect, it makes an artificial eclipse. ...
... A coronagraph uses a telescope with a piece blocking the sun, so that the corona can be observed at any time. In effect, it makes an artificial eclipse. ...
Nuclear reactions: fission and fusion
... may be left in an excited (higher -energy) state. Gamma rays are more penetrating than either alpha or beta radiation, bu t less ionising. Gamma rays from nuclear fallout would probably cause the largest number of casualties in the event of the use of nuclear weapons in a nuclear ...
... may be left in an excited (higher -energy) state. Gamma rays are more penetrating than either alpha or beta radiation, bu t less ionising. Gamma rays from nuclear fallout would probably cause the largest number of casualties in the event of the use of nuclear weapons in a nuclear ...
Document
... three planets. The atmospheric escape may actually be stronger from a magnetized planet during increased solar wind activities. The intrinsic magnetic field does not protect the atmosphere from the solar wind for Earth’s case. note: May protect for strong magnetic field (Jupiter), but SW energy is h ...
... three planets. The atmospheric escape may actually be stronger from a magnetized planet during increased solar wind activities. The intrinsic magnetic field does not protect the atmosphere from the solar wind for Earth’s case. note: May protect for strong magnetic field (Jupiter), but SW energy is h ...
Kinetic aspects of the vortex-induced
... Plasma mixing of collisionless plasmas In the MHD approximation, the frozen-in condition does not allow for plasmas to mix across magnetic field lines. BUT, for example, the Earth’s magentosphere contains plasmas of solar wind origin. ⇒It means plasma mixing in fact occurs through the Earth’s ...
... Plasma mixing of collisionless plasmas In the MHD approximation, the frozen-in condition does not allow for plasmas to mix across magnetic field lines. BUT, for example, the Earth’s magentosphere contains plasmas of solar wind origin. ⇒It means plasma mixing in fact occurs through the Earth’s ...
plasma
... Plasma, like ordinary matter, is made up of atoms. Atoms are so tiny that more than a million can fit across the head of a pin. They are composed of one or more negatively charged electrons that orbit a positively charged nucleus (made up of neutral particles, called neutrons, and positively charged ...
... Plasma, like ordinary matter, is made up of atoms. Atoms are so tiny that more than a million can fit across the head of a pin. They are composed of one or more negatively charged electrons that orbit a positively charged nucleus (made up of neutral particles, called neutrons, and positively charged ...
Developing an Efficient Low-Temperature Nuclear Fusion Reactor
... Coulomb barrier becomes essentially irrelevant. In this interaction the electrons are also delocalised as Bloch waves and serve to shield the relevant charges of the nuclei and enable them to come closer together. Thus, having particles with very long wave lengths, in a lattice of confined deuterons ...
... Coulomb barrier becomes essentially irrelevant. In this interaction the electrons are also delocalised as Bloch waves and serve to shield the relevant charges of the nuclei and enable them to come closer together. Thus, having particles with very long wave lengths, in a lattice of confined deuterons ...
CIII 97.7 nm - Astronomy at Swarthmore College
... - During magnetic reconnection, high magnetic field gradients cause field lines to change their topology and reconnect, converting stored magnetic energy into kinetic energy in bulk plasma flows or heating. This process provides a likely explanation for the extremely high temperatures observed in th ...
... - During magnetic reconnection, high magnetic field gradients cause field lines to change their topology and reconnect, converting stored magnetic energy into kinetic energy in bulk plasma flows or heating. This process provides a likely explanation for the extremely high temperatures observed in th ...
PHYSICS 015
... million) degrees. This ignites “triple-alpha burning.” As in the p-p cycle, the fusion takes place in a series of steps. The net result is that helium nuclei are converted principally to carbon (also oxygen), with a net release of energy. ...
... million) degrees. This ignites “triple-alpha burning.” As in the p-p cycle, the fusion takes place in a series of steps. The net result is that helium nuclei are converted principally to carbon (also oxygen), with a net release of energy. ...
HW #01
... How does nuclear fusion produce energy? Why does nuclear fusion need high temperatures and densities? Why is it so hard to develop nuclear fusion as a dependable power source on Earth? Why will chemical reactions or gravitational contraction not work for powering the Sun? What is the net result of t ...
... How does nuclear fusion produce energy? Why does nuclear fusion need high temperatures and densities? Why is it so hard to develop nuclear fusion as a dependable power source on Earth? Why will chemical reactions or gravitational contraction not work for powering the Sun? What is the net result of t ...
Homework 2 key: Radiation processes, Larmor formula
... (a) What fraction of the star's radiation is capable of ionizing neutral hydrogen? Plot the Planck function vs. frequency; indicate the region of ionizing photons with a vertical line (use the 'marker' option in MathCAD plots). ...
... (a) What fraction of the star's radiation is capable of ionizing neutral hydrogen? Plot the Planck function vs. frequency; indicate the region of ionizing photons with a vertical line (use the 'marker' option in MathCAD plots). ...
Toward a Global Description of the Nucleus
... In a neutron star crust, ions form a Coulomb lattice structure surrounded by a degenerate electron gas. Electron screening effects become so strong that rates of nuclear reactions increase considerably even at low energies; Pycnonuclear reactions take place under very high density conditions and are ...
... In a neutron star crust, ions form a Coulomb lattice structure surrounded by a degenerate electron gas. Electron screening effects become so strong that rates of nuclear reactions increase considerably even at low energies; Pycnonuclear reactions take place under very high density conditions and are ...
Kinetic Studies of Nonrelativistic Young Supernova Remnant
... whether or not the shock structure and the particle spectra reach a steady state, and to what degree a parallel magnetic field renders shock formation more efficient. A secondary goal was to investigate the efficacy of particle preacceleration, which appears needed for their injection into a diffusi ...
... whether or not the shock structure and the particle spectra reach a steady state, and to what degree a parallel magnetic field renders shock formation more efficient. A secondary goal was to investigate the efficacy of particle preacceleration, which appears needed for their injection into a diffusi ...
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.