Hannes Alfven Papers
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A Brief History of Magnetospheric Physics Before the Spaceflight Era
A BRIEF HISTORY OF MAGNETOSPHERIC PHYSICS BEFORE THE SPACEFLIGHT ERA David P. Stern Laboratoryfor ExtraterrestrialPhysics NASAGoddard Space Flight Center Greenbelt,Maryland Abstract.This review traces early resea/ch on the Earth's aurora, plasma cloud particles required some way of magneticenvironment, covering the period when only penetratingthe "Chapman-Ferrarocavity": Alfv•n (1939) ground:based0bservationswerepossible. Observations of invoked an eleCtric field, but his ideas met resistance. The magneticstorms (1724) and of perturbationsassociated picture grew more complicated with observationsof with the aurora (1741) suggestedthat those phenomena comets(1943, 1951) which suggesteda fast "solarwind" originatedoutside the Earth; correlationof the solarcycle emanatingfrom the Sun's coronaat all times. This flow (1851)with magnetic activity (1852) pointed to theSun's was explainedby Parker's theory (1958), and the perma- involvement.The discovei-yof •solarflares (1859) and nent cavity which it producedaround the Earth was later growingevidence for their associationwith large storms named the "magnetosphere"(1959). As early as 1905, led Birkeland (1900) to proposesolar electronstreams as Birkeland had proposedthat the large magneticperturba- thecause. Though laboratory experiments provided some tions of the polar aurora refleCteda "polar" type of support;the idea ran into theoreticaldifficulties and was magneticstorm whose electric currents descended into the replacedby Chapmanand Ferraro's notion of solarplasma upper atmosphere;that idea, however, was resisted for clouds (1930). Magnetic storms were first attributed more than 50 years. By the time of the International (1911)to a "ringcurrent" of high-energyparticles circling GeophysicalYear (1957-1958), when the first artificial the Earth, but later work (1957) reCOgnizedthat low- satelliteswere launched, most of the importantfeatures of energy particlesundergoing guiding center drifts could the magnetospherehad been glimpsed, but detailed have the same effect. -
Kristian Birkeland (1867 - 1917) the Almost Forgotten Scientist and Father of the Sun-Earth Connection
Kristian Birkeland (1867 - 1917) the Almost Forgotten Scientist and Father of the Sun-Earth Connection PÅL BREKKE Norwegian Space Centre ISWI Workshop, Boston College, 31 July - 4 August 2017 The Young Kristian Birkeland Olaf Kristian Birkeland was born 13 December 1967. Early on Birkeland was interested in magnetism and already as a schoolboy he had bought his own magnet with his own money. He used the magnet for many surprising experiments and practical jokes - often irritating his teachers Birkeland’s Early Career Birkeland became a certificate teacher at the University of Kristiania at only 23 years old and graduated with top grades. In 1896 Birkeland was elected into the Norwegian Academy of Sciences at only 28 years old. Two years later he became a professor in Physics - quite unusual at that young age at that time (was called «the boy professor»). Photograph of Kristian Birkeland on Karl Johans Gate, (Oslo) in 1895 taken by student Carl Størmer, using a concealed camera. (source: UiO) Birkeland - Electromagnetic Waves Birkeland did laboratory experiments on electromagnetic waves in 1890 and first publication came in 1892 with some ground breaking results. In 1893 he focused on the energy transported by these waves. In 1895 Birkeland published his most important theoretical paper. He provided the first general solution of Maxwell’s equations for homogeneous isotropic media. First page of Birkeland's 1895 paper where he derived a general solution to Maxwell’s equations Birkeland - Cathode Rays In 1895 he began pioneer studies of cathode rays, a stream of electrons in a vacuum tube that occurs through high voltage passing between negative and positive charged electrodes. -
Kristian Birkeland's Pioneering Investigations of Geomagnetic
CMYK RGB Hist. Geo Space Sci., 1, 13–24, 2010 History of www.hist-geo-space-sci.net/1/13/2010/ Geo- and Space © Author(s) 2010. This work is distributed under the Creative Commons Attribution 3.0 License. Access Open Sciences Advances in Science & Research Kristian Birkeland’s pioneering investigationsOpen Access Proceedings of geomagnetic disturbances Drinking Water Drinking Water A. Egeland1 and W. J. Burke2 Engineering and Science Engineering and Science 1University of Oslo, Norway Open Access Access Open Discussions 2Air Force Research Laboratory, USA Received: 11 February 2010 – Accepted: 15 March 2010 – Published: 12 April 2010 Discussions Earth System Earth System Abstract. More than 100 years ago Kristian Birkeland (1967–1917) addressed questions that had Science vexed sci- Science entists for centuries. Why do auroras appear overhead while the Earth’s magnetic field is disturbed? Are magnetic storms on Earth related to disturbances on the Sun? To answer these questions Birkeland devised Open Access Open terrella simulations, led coordinated campaigns in the Arctic wilderness, and then interpretedAccess Open hisData results in Data the light of Maxwell’s synthesis of laws governing electricity and magnetism. After analyzing thousands of magnetograms, he divided disturbances into 3 categories: Discussions 1. Polar elementary storms are auroral-latitude disturbances now called substorms. Social Social 2. Equatorial perturbations correspond to initial and main phases of magnetic storms. Open Access Open Geography Open Access Open Geography 3. Cyclo-median perturbations reflect enhanced solar-quiet currents on the dayside. He published the first two-cell pattern of electric currents in Earth’s upper atmosphere, nearly 30 years before the ionosphere was identified as a separate entity. -
L5 News, April 1976
In an effort to appease the budget (space stations housing up to two L-5 NEWS watchdogs, both within Congress and hundred people) and, possibly, to space OMB, however, the Committee kept the colonies. A Newsletter from the L-5 Society overall NASA budget within the $3.69 Several Soviet scientists have stated Number 8 * April * 1976 billion figure by dropping some other that many of the experiments being programs that OMB had allowed. carried out within the Salyut space MSFC SYMPOSIUM ON Most significant is a cut of $8 million station program are aimed at developing SPACE INDUSTRIALIZATION from Development Test and Mission new techniques for large permanent Operation (DTMO). These funds are part orbital bases. A two-day symposium on “Space of the Shuttle R&D budget. The Shuttle In an interview with the Soviet news- Industrialization” will be held at the is essential for the construction of the paper, Izvestia, August 1975, NASA-Marshall Space Flight Center, 200-person orbiting facility, planned to Academician V. Glushko stated that Alabama, May 26-27. be completed in 1983-85 (given “There can be no doubt that in the future To be sponsored jointly by the appropriate funding), at which solar the crews of orbital stations will be Alabama Section of the American power satellite construction techniques international and space exploration will Institute of Aeronautics and Astronautics will be developed. A strong case could be become a matter involving that whole (AIAA) and the Marshall Center, the 1 made that funding power satellite planet.“ symposium will cover four primary research by diverting Shuttle funds is Another statement by Academician topics: Space Habitation, Space counterproductive. -
Nobel Prize for Physics 1970
Nobel Prize for Physics 1970 The Royal Swedish Academy of Sciences has awarded the 1970 Nobel Prize jointly to two European physicists: to H. Alfvén for his establishment of the fundamental principles of magnetohydrodynamics which decisively influenced the development of plasma physics, and to L. Néel for his research and funda mental discoveries regarding antiferromagnetism and ferrimagnetism, which have important applications in the physics of solids. An assessment of these men and their work is given below. the predicted magnetic decomposition that there could exist, below the Curie of the solid into two sublattices. point, a compensation temperature at In 1936 Néel also showed theore which the magnetizations on the two tically that antiferromagnetism must sublattices are equal in magnitude be characterized by the existence of but opposite in sign, so that the net a critical external magnetic field. macroscopic moment becomes zero. Passing through this critical value the The moment of such a permanent magnetic susceptibility exhibits a magnet would change its sign at that discontinuity. Sixteen years later this temperature. A few years later, E.W. curious phenomenon was detected Gorter in Eindhoven found that a experimentally by C.J. Gorter and N.J. mixed ferrite of lithium and chromium Poulis in CUCI2.2 H2O. has this property. In 1948, Néel succeeded in inter The theory of ferrimagnetism en preting for the first time the magnetic abled Néel and Bertaut to elucidate properties of spinel structures of the the properties of pyrrhotine, Fe7S8, a Louis Néel ferrites, which had remained a mys mysterious substance on which Weiss Louis Néel received the award in tery to physicists for fifty years. -
Birkeland Currents and Dark Matter
Issue 2 (April) PROGRESS IN PHYSICS Volume 14 (2018) Birkeland Currents and Dark Matter Donald E. Scott Dept. of Electrical Engineering (Retired), University of Massachusetts, Amherst, Massachusetts, USA E-mail: [email protected] A straight-forward application of basic electrical definitions and one of Maxwell’s di- vergence equations provide an extension of the Bessel function model of force-free, field-aligned currents (FAC). This extended model offers descriptions of the charge den- sity, electric-field strength, velocity profile, and voltage profile, each as a function of radial value, r, within the cross-section of the FAC structure. The resulting model ex- hibits an obvious correspondence with the results of the Marklund convection process in plasma filaments. Most importantly, it shows that observed stellar velocity profiles in galaxies are now accurately predicted without invocations of Dark Matter, WIMPs, or MACHOs. 1 Introduction to be of unlimited extent in length and have a circular cross- section, the model assumes no variation of either B or j in the Kristian Birkeland’s hypothesis [1] that Earth’s auroras are θ, or z directions. The mathematical results of this modeling powered by electric charges flowing from the Sun was shown process are: to be correct in the late 1960’s [2]. Since that time there has been a growing interest in the exact structure of those Bz(r) = Bz(0) J0(αr) ; (1) streams. What are the precise shapes and physical proper- ties of these currents that cascade down into Earth’s polar B (r) = B (0) J (αr) ; (2) regions? NASA calls them “magnetic flux-ropes”. -
The EISCAT 3D Project in Norway: E3DN Kristian Birkeland's
The EISCAT 3D Project in Norway: E3DN Cesar La Hoz*1, Kjellmar Oksavik2, Vasyl Belyey1 1 University of Tromsø, Department of Physics and Technology, NO-9037 Tromsø, Norway, [email protected], [email protected] 2 University of Bergen, Department of Physics and Technology, NO-5020 Bergen, Norway, [email protected] EISCAT 3D (E3D) is a project to build the next generation of incoherent scatter radars endowed with 3-dimensional scalar and vector capabilities that will replace the current EISCAT radars in Northern Scandinavia. One active (transmit- ting) site in Norway and four passive (receiving) sites in the Nordic countries will provide 3–D vector imaging capabil- ities by rapid scanning and multi-beam forming. The unprecedented flexibility of the solid-state transmitter with high duty-cycle, arbitrary wave-forming and polarisation and its pulsed power of 10 MW will provide unrivalled experimental capabilities to investigate the highly non-stationary and non-homogeneous state of the polar upper atmosphere. Aperture Synthesis Imaging Radar (ASIR) will to endow E3D with imaging capabilities in 3-dimensions that includes sub-beam resolution. Complemented by pulse compression, it will provide 3-dimensional images of certain types of incoherent scat- ter radar targets resolved to about 100 metres at 100 km range, depending on the signal-to-noise ratio. The Norwegian scientific programme is inspired by the pioneer polar scientist Kristian Birkeland (picture) and includes pressing questions on polar upper atmospheric research, among -
Kristian Birkeland: the Great Norwegian Scientist That Nobody Knows
KRISTIAN BIRKELAND: THE GREAT NORWEGIAN SCIENTIST THAT NOBODY KNOWS Birkelandforelesningen 15. Juni 2017 av professor David Southwood, Imperial College, London Introduction Ask a foreigner for the name of a famous Norwegian. Rapidly one discovers that the late nineteenth century produced a flowering of Norwegian cultural talent as, as likely as not, the nominee will come from that time. These were, of course, years of an increasing sense of Norwegian identity, the years lead - ing up to Norway’s independence from Sweden in 1905. The list of Norwe - gians easily identified by a foreigner would surely include Henrik Ibsen, Edvard Munch, Edvard Grieg, Fridtjof Nansen, Roald Amundsen. However, one man would be missing. Despite being featured on the tail planes of Nor - wegian airliners and familiar to Norwegians after featuring for 20 years on the 200 NoK banknote, Kristian Birkeland will not leap to foreigners’ minds. Even if you asked for a scientist, one might get Abel, Lie or Bjerknes before Birkeland. Why is that so? Here I shall attempt to explain this conundrum. A detailed biography has been given by Egeland and Burke (2005). In ad - dition, an English journalist (Jago, 2001), has written a biography that is al - most a novelisation of his life. That this could be done, marks how multifaceted this man was. Birkeland was obsessed with the Northern Lights. The elegant picture in Figure 1 illustrates this, and Jago brings out this clearly. Egeland and Burke, both scientists, make clear how close he came to understanding their origin. I’ll try not to repeat too much of what is told in the two books. -
Articles Entered and Propagated in the Magnetosphere to Form the Ring Current
CMYK RGB Hist. Geo Space Sci., 3, 131–142, 2012 History of www.hist-geo-space-sci.net/3/131/2012/ Geo- and Space doi:10.5194/hgss-3-131-2012 © Author(s) 2012. CC Attribution 3.0 License. Access Open Sciences Advances in Science & Research Open Access Proceedings The ring current: a short biography Drinking Water Drinking Water Engineering and Science Engineering and Science A. Egeland1 and W. J. Burke2 Open Access Access Open Discussions 1Department of Physics, University of Oslo, P.O. Box 1048, Blindern, 0316 Oslo, Norway 2Boston College, Institute for Scientific Research, Chestnut Hill, MA, USA Discussions Correspondence to: A. Egeland ([email protected]) Earth System Earth System Received: 27 March 2012 – Revised: 26 June 2012 – Accepted: 3 July 2012 – Published: 6 August 2012Science Science Abstract. Access Open The “ring current” grows in the inner magnetosphere during magnetic storms and contributesAccess Open Data sig- Data nificantly to characteristic perturbations to the Earth’s field observed at low-latitudes. This paper outlines how understanding of the ring current evolved during the half-century intervals before and after humans gained Discussions direct access to space. Its existence was first postulated in 1910 by Carl Størmer to explain the locations and equatorward migrations of aurorae under stormtime conditions. In 1917 Adolf Schmidt applied Størmer’s ring-current hypothesis to explain the observed negative perturbations in the Earth’s magnetic field.Social More than Social another decade would pass before Sydney Chapman and Vicenzo Ferraro argued for its necessity to explain Access Open Geography Open Access Open Geography magnetic signatures observed during the main phases of storms. -
Physical Science Methods for Elementary Teachers. an Experimental Course
DOCUMENT RESUME ED 296 885 SE 049 411 AUTHOR Orlich, Donald C. TITLE Physical Science Methods for Elementary Teachers. An Experimental Course. A Model to Improve Preservice Elementary Science Teacher Development. Volume V. INSTITUTION Washington State Univ., Pullman. SPONS AGENCY National Science Foundation, Washington, D.C. PUB DATE 15 Jun 88 GRANT TEI-8470609 NOTE 452p.; For other volumes in this series, see SE 049 407-412. PUB TYPE Guides Classroom Use Materials (For Learner) (051) EDRS PRICE MF01/PC19 Plus Postage. DESCRIPTORS *College Science; *Course Content; Course Descriptions; Curriculum Dew opment; Elementary Education; Elementary School Science; Experiential Learning; Higher Education; *Preservice Teacher Education; Science Education; *Science Experiments; Science Teachers; Science Tests; *Teacher Education Curriculum; *Teaching Methods ABSTRACT A group of scientists and science educators at Washington State University has developed and pilot tested an integrated physical science program designed for preservice elementary school teachers. This document is a comprehensive guide to be provided to students in a physical science teaching methods course. Chapters include: (1) "Science as a Focus" (rationales, teacher as decision maker, trends and progress); (2) "Determining What Will Be Taught" (planning and objectives); (3) "Taxonomics and Teaching Science"; (4) "Questions and Teaching Science"; (:) "Using Science-Related Discussions"; (6) "Using the Real Stuff of Science: Inquiry"; (7) "Classroom Management"; (8) "Simulations and Games in Science Teaching"; (9) "Science Safety"; and (10) "Evaluating Students and Elementary Science Programs." Each chapter concludes with a list of references. An outline of the methods course content is appended. (CW) *********************************************************************** * Reproductions supplied by EDRS are the best that can be made * * from the original document. -
Message from the SUN
American Research Journal of Physics ISSN: 2380-5714 Volume 3, Issue 1, 19 Pages Message from the SUN Avtar Singh Gill [email protected] Abstract: The Northern and Southern Lights are caused by the solar IMF. Gill’s Electronic Theory of Magnetism (1964) shows how the solar IMF on approaching the magnetosphere of the Earth splits into its negative and positive electric energy components which head for the opposite magnetic poles of the Earth to cause the equally bright Aurora Borealis and Aurora Australis. Why these Northern and Southern lights don’t reach all the way to the magnetic poles of the Earth and why they are brighter on the night side will be illustrated. Kristian Birkeland’s (1900-1916) “terrella” experiments are also further explained. The great 1859 spectral auroral event affecting the Earth which also showed the link between the magnetic effect and the electrical effect is explained (Message from the SUN.) The solar source of the essential electrical seeding of the magnetic poles of the Earth for the functioning of the geomagnetic dynamo of the Earth to create its magnetosphere is shown Some applications to harness this solar electrical energy are presented and some dot product equations are presented to support these applications. Gill’s electronic theory of magnetism (1964) explains all of the above and is better than Maxwell’s pre-existing dipole theory of magnetism (1873). INTRODUCTION The Northern and Southern lights also called the Aurora Borealis and Auroral Australis are a natural light display in the sky particularly in the high latitude (Arctic and Antarctic) regions known to be close to the magnetic poles of the Earth. -
The Cosmic-Triple-Jump of the Plasma Universe
http://www.amatterofmind.us/ PIERRE BEAUDRY’S GALACTIC PARKING LOT THE COSMIC-TRIPLE-JUMP OF THE PLASMA UNIVERSE The framing of a triply-connected Plasma Cosmology as a higher hypothesis of three plasma physicists: Anthony Peratt, Hannes Alfven, and Kristian Birkeland. By Pierre Beaudry, 6/13/2016 FOREWORD Up until the 1950’s, the universe was usually assumed to be composed of ordinary physical matter. During the 1960’s plasma physicist, Hannes Alfven considered that since earlier atom-smashing experiments showed asymmetry in the production of particles and antiparticles, it were possible that the universe be composed of ambiplasma; that is, composed of matter and antimatter. In this report, I will show how the three leading plasma physicists, Anthony Peratt, Hannes Alfven, and Kristian Birkeland have found good reasons to believe that the universe was also composed of matterofmind; that is to say, that the universe could only be understood fundamentally from the vantage point of a triply-connected scientific mind. Page 1 of 32 http://www.amatterofmind.us/ PIERRE BEAUDRY’S GALACTIC PARKING LOT INTRODUCTION “Always make sure that you rely on something that you didn’t believe before.” Lyndon LaRouche, EIR, June 3, 2016 The means of guaranteeing the pace of developing creativity around the world is to innovate in conceptions about God, man, and nature that may have existed before, but which had been rejected by public opinion. This means that the discovery of a new conception does not come cheap. It requires the discovery of a new principle of higher hypothesis, above and beyond art and science.