PPT-Proton precession in magnetic fields

Amanda J Fagan Wittenberg University March 19 2014 Outline Problem statement Precession Frequency Sample Problem Sources Questions 2 Problem statement a Show that a spinning magnetic moment in the presence of a magnetic field leads to a precession of the magnetic moment . In addition magnetic fields create a force only on moving charges The direction the magnetic field produced by a moving charge is perpendicular to the direction of motion The direction of the force due to a magnetic field is perpendicular to the dir S.P. Reynolds et al.. Martin, Tseng Chao . Hsiung. 2013/12/18. Which contents I will cover…. Shell Supernova Remnants: Obliquity Dependence, and . Summary!. Magnetic Fields in Pulsar-Wind Nebulae.. 8.5 – Applications of Electric and Magnetic Fields. Agenda. Quiz. Lesson on Section on 8.5. Lots of Video’s. Story Time. Cyclotron Particle Accelerator. http://. www.youtube.com/watch?v=cNnNM2ZqIsc. Dayal Wickramasinghe and Lilia . Ferrario. Australian National University. Canberra. . . The chemically peculiar . Ap. , Bp stars ( ~ 1.8 -5 . M. sun. ) are magnetic, and . have ordered large. scale fields, . Andrii Neronov. University of Geneva. Durrer. & AN, . A&ARev. , 21, 62 (2013) . Overview . Magnetic fields in astronomy and cosmology. Characterization. of cosmological magnetic fields. Generation. B. - Features. - Force. - Sources. filings. LORENTZ FORCE. Chapter 3 and 4 Concept Map. Make a concept map showing the relationship between the following quantities and concepts:. Laplace. ’. s equation. introduction to MR. Robert Frost. MRI signal from protons. Nuclei with odd number of protons/neutrons have ”spin” or angular momentum. “spin” + charge .  magnetic moment. Bar magnets have magnetic moment. at HIMAC synchrotron. Hiroshi Uchiyama . #,A). , Masahiro Kawashima . A). , . Shunsuke. Saito . A). , Izumi Kobayashi . A). , . Tadahiro. . Shiraishi. . A). ,. Chihiro. Kobayashi . A). , Eiichi . Part 1. Magnetic Resonance Imaging. A great multidisciplinary application of physics and other sciences. And example of a “pure science” discovery given a practical application. Based on NMR – Nuclear Magnetic Resonance – discovered in the 1940s. all magnets have magnetic poles – . . points at the ends of a magnet that have opposing magnetic qualities. all magnets have a north pole and south pole that are magnetically opposite. like poles repel and unlike poles attract. Robert Frost. Magnetic Resonance key points. Polarisation. Excitation. Precession. Measure. Relaxation. Magnetic Resonance key points. Polarisation. Excitation. Precession. Measure. Relaxation. MRI signal from protons. 24.1 Magnets: Permanent & Temporary. Electric generators. Television sets. Cathode-ray displays. Computer hard drives. Compass. General Properties of Magnets. Polarized-magnets are polarized. They have two distinct and opposite ends.. 21. History of Magnetism . In 1269, Pierre de Maricourt of France found that the directions of a needle near a spherical natural magnet formed lines that encircled the sphere and passed through two points diametrically opposite each other, which he called the poles of the magnet. Subsequent experiments showed that every magnet, regardless of its shape, has two poles, called North (N) and (S) poles, that exert forces on other magnetic poles similar to the way electric charges exert forces on one another. That is, like poles (N-N or S-S) repel each other, and opposite poles (N-S) attract each other. Systems. Frank Barnes.  . Department of Electrical, Computer, and Energy Engineering, University of Colorado, Boulder, Colorado. Acknowledgement. Ben Greenebaum. . Lucas Portelli . Carlos Martino .