Download or read book On a Solar Flare Model and Its Laboratory Experimentation written by K. T. YEN and published by . This book was released on 1965 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theoretical model for solar flares is presented to describe the physical processes considered likely to occur in the solar atmosphere above a complex sunspot group leading to the formation and development of a solar flare. Based on the idea that the strong magnetic fields of large sunspots play the dominant role in these processes, a bipolar sunspot group is considered in some detail to show how a very strong magnetic compression can take place to accumulate enough energy to form a solar flare. Estimates of the time scales for solar plasma confinement and the containment of neutral hydrogen atoms are made to show the proposed model to be a feasible one. Physical conditions favorable to the formation of solar flares and the relationship of flares to prominences and filaments are discussed. A laboratory experiment is outlined to verify the validity of the proposed model, and to investigate, within the limitations of laboratory simulation, the physical phenomenon following the flash phase of a 'flare'. (Author).
Download or read book A Laboratory Solar Flare Neutral Point Experiment written by R. S. White and published by . This book was released on 1975 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: ;Contents: Experimental studies of the reconnection process; Admittance probe measurements in the double inverse pinch device; X-ray and electron spectra from the double inverse pinch device; Plasma instability at an x-type magnetic neutral point; Experimental study of the reconnection process; Mass motion and heating in a magnetic neutral point system; Spectrum of turbulence at a magnetic neutral point; Effect of obstacles on the rate of reconnection of magnetic field lines; Impulsive flux transfer events and solar flares; Confinement by a triple inverse pinch.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 1058 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Statistical Summary of Solar Flare Reports and Observatory Practices for the Period 1955 1964 written by Delos C. Jensen and published by . This book was released on 1967 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a summary of the ten years (1955-1964) of observations of solar flares reported by 61 observatories. The flare reports have been published predominantly in the IAU Bulletin and CRPL-F Series Part B. This report summarizes the types of information contained in the flare reports, and the frequency of some parts of these reports as functions of many parameters. The results reflect the need for closer cooperation and coordination of participating observatories in recording and reporting solar flare data.
Download or read book Solar Flares written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Three points are emphasized: that the solar flare is that particular astrophysical phenomenon that is the extremum of reconnection, no other phenomenon demands as rapid magnetic flux annihilation as is seen in the solar flare; that plasma physics experiments can and should be performed in the laboratory that model reconnection as we observe it in astrophysics; and that stochastic field lines derived from something similar to Alfven wave turbulence are a necessary part of reconnection.
Download or read book Testing Solar Flare Models with Batse written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-12 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: We propose to use high-sensitivity Burst and Transient Source Experiment (BATSE) hard X-ray observations to test the thick-target and electric field acceleration models of solar flares. We will compare the predictions made by these models with hard X-ray spectral observations obtained with BATSE and simultaneous soft X-ray Ca XIX emission observed with the Yohkoh Bragg Crystal Spectrometer (BCS). The increased sensitivities of the BATSE and BCS (relative to previous detectors) permits a renewed study of the relationship between heating and dynamical motions during the crucial rise phase of flares. With these observations, we will: (1) investigate the ability of the thick-target model to explain the temporal evolution of hard X-ray emission relative to the soft X-ray blueshift during the earliest stages of the impulsive phase; and (2) search for evidence of electric-field acceleration as implied by temporal correlations between hard X-ray spectral breaks and the Ca XIX blueshift. The proposed study will utilize hard X-ray lightcurve and spectral measurements in the 10-100 keV energy range obtained with the BATSE Large Area Detectors (LAD). The DISCLA and CONT data will be the primary data products used in this analysis. Zarro, Dominic M. Goddard Space Flight Center NAS5-32491...
Download or read book The Construction and Testing of a Pair of Matched Solar Telescopes written by Fred Ward and published by . This book was released on 1973 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: A pair of carefully matched telecopes and videometers were constructed and tested to determine their suitability to obtain routine standardized measurements of solar flares. Useful data were obtained from both telescopes during four flares between March 1971 and March 1972. Errors in the current international patrol are typically a factor of two. The mismatch of the areas of the four flares measured by these telescope systems was only 10%, indicating the extent of the possible improvement to be obtained by careful matching and intercalibration of patrol instruments. (Author).
Download or read book Solar Maximum Analysis written by Vladimir Evgenʹevich Stepanov and published by VSP. This book was released on 1987-12 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings contain the review and contributed papers given at the SMY--SMA Workshop held in Irkutsk (USSR), 17--24 June 1985. The main themes of the Workshop were plasma physics and magnetohydrodynamics with applications to processes occurring in solar flares. The papers published in this volume are organized around the following topics: -- the reconnection of coronal magnetic fields as a source of flare energy -- the acceleration of particles to high energies -- the dynamics of interplanetary clouds and shocks
Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1965 with total page 1654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Response of the Transition Region to Infalling Material Associated with Solar Flares written by Y. Nakagawa and published by . This book was released on 1970 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work is part of a continuing study of the solar activity that has a pronounced effect on our environment. The response of the transition region to infalling material associated with solar flares (often caused by the 'disparitions brusques', sudden disappearance of prominences) is considered and the possibility of examining the height and structure of the transition region from such a response is discussed. (Author).
Download or read book A Laboratory Model of Solar Flares written by Peter Joseph Baum and published by . This book was released on 1971 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Unstable Arch Model of a Solar Flare written by D. S. Spicer and published by . This book was released on 1976 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physical Processes in Solar Flares written by B.V. Somov and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solar flares are very complex electromagnetic phenomena of a cataclysmic nature. Particles are accelerated to very high velocities and a variety of physical processes happen inside and outside flares. These processes can be studied by a large number of techniques from Earth and from space. The aim is to discover the physics behind solar flares. This goal is complicated because information about the flare mechanism can be obtained only in an indirect way by studying the secondary effects. This book provides three stages in the solution of the solar flare problem. Chapter one describes the connection between observational data and theoretical concepts, where it is stressed that next to investigating flares, the related non-stationary large-scale phenomena must be studied as well. The second chapter deals with secondary physical processes, in particular the study of high-temperature plasma dynamics during impulsive heating. The last chapter presents a model built on the knowledge of the two previous chapters and it constructs a theory of non-neutral turbulent current sheets. The author believes that this model will help to solve the problem of solar flares. For solar physicists, plasma physicists, high-energy particle physicists.
Download or read book Introduction to Solar Radio Astronomy and Radio Physics written by A. Krüger and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1. 1. Short History of Solar Radio Astronomy Since its birth in the forties of our century, solar radio astronomy has grown into an extensive scientific branch comprising a number of quite different topics covering technical sciences, astrophysics, plasma physics, solar-terrestrial physics, and other disciplines. Historically, the story of radio astronomy goes back to the times of James Clerk Maxwell, whose well known phenomenological electromagnetic field equations have become the basis of present-time radio physics. As a direct consequence of these equations, Maxwell was able to prognosticate the existence of radio waves which fifteen years later were experimentally detected by the famous work of Heinrich Hertz (1887/88). However, all attempts to detect radio waves from cosmic objects failed until 1932, which was mainly due to the early stage of development of receiving techniques and the as yet missing knowledge of the existence of a screening ionosphere (which was detected in 1925). Therefore, famous inventors like Thomas Edison and A. E. Kennelly, as well as Sir Oliver Lodge, were unsuccessful in receiving any radio emission from the Sun or other extraterrestrial sources. Another hindering point was that nobody could a priori expect that solar radio emission should have something to do with solar activity so that unfortunately by chance some experiments were carried out just at periods of low solar activity. This was also why Karl Guthe Jansky at the birth of radio astronomy detected galactic radio waves but no emission from the Sun.
Download or read book Final Report for Phase II Project PREP written by C. M. Theiss and published by . This book was released on 1965 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
