Download or read book A Simple Model of the Interplanetary Magnetic Field The cosmic ray anisotropy written by David Peter Stern and published by . This book was released on 1964 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Simple Model of the Interplanetary Magnetic Field Part 2 The Cosmic Ray Anisotropy written by United States. National Aeronautics and Space Administration and published by . This book was released on 1964 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Simple Model of the Interplanetary Magnetic Field Part 2 The Cosmic Ray Anisotropy written by United States. National Aeronautics and Space Administration and published by . This book was released on 1964 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Note written by and published by . This book was released on 1964 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Anisotropy of the Cosmic ray Flux Caused by an Interplanetary Magnetic Field written by Ronald Rice Harrington and published by . This book was released on 1962 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Anomalous Cosmic ray Anisotropy and Unidirectional Interplanetary Magnetic Field During 1954 written by Stanford University. Institute for Plasma Research and published by . This book was released on 1973 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Observations of the interplanetary magnetic field during solar minimum lead to the following important conclusions for cosmic ray modulation: (a) the interplanetary magnetic field does not show any sector structure for a few solar rotations, i.e. the field has polarity away from the sun during this interval, (b) cosmic ray diffusion in the interplanetary medium is essentially anisotropic for rigidity of the order of 10 GV (K parallel/K perpendicular approximately 0.01 ratio of diffusion coefficients calculated from the magnetic-field power spectra by Jokipii and Coleman). If diffusion occurs essentially along the magnetic field lines, the cosmic ray density U(r, T) is a symmetric function of the heliolatitude lambda with a minimum in the equatorial plane: U(r, T, lambda) proportional to a exp( -b cosine squared (lambda)). Therefore a cosmic ray density gradient across the solar equatorial plane exists and it depends on the size of the modulation region. (Modified author abstract).

Download or read book Effect of the Interplanetary Magnetic Field on the Propagation of Cosmic Rays written by Kenneth G. McCracken and published by . This book was released on 1968 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents a study of cosmic-ray propagation in the interplanetary magnetic field using spacecraft and neutron monitor data. Improved methods have been developed for mapping cosmic ray flux as a function of direction and time. This cosmic-ray mapping technique made possible a detailed study of the Forbush decrease observed on January 20, 1966. Using numerical filtration techniques developed for the purpose, demi-diurnal and dirunal components of cosmic radiation were studied. Two distinctly different anisotropies were identified in the course of studying the interrelationship of cosmic ray anistropy and the interplanetary magnetic field. One anisotropy is due to convective removal of cosmic radiation from the solar system by the radial flow of the solar wind. The other is due to diffusion of the cosmic radiation parallel to the lines of force of the interplanetary magnetic field. Temporal variability of Pioneer VII data during high counting rate periods has been studied. Study of some five days of data indicates continuous fluctuation of the cosmic radiation flux, with periods as short as five minutes occurring frequenctly. No diminution of fluctuation amplitude with time was observed. (Author).

Download or read book Technical Abstracts written by Goddard Space Flight Center and published by . This book was released on 1962 with total page 1024 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 1212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Goddard written by Goddard Space Flight Center and published by . This book was released on 1964 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sector Structure of the Interplanetary Magnetic Field and Anisotropy of 50 1000 GV Cosmic Radiation written by G. Erdõs and published by . This book was released on 1978 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Abstracts U S Goddard Space Flight Center written by Goddard Space Flight Center and published by . This book was released on 1962 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magnetic Fields in Diffuse Media written by Alexander Lazarian and published by Springer. This book was released on 2014-11-14 with total page 627 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents the current knowledge of magnetic fields in diffuse astrophysical media. Starting with an overview of 21st century instrumentation to observe astrophysical magnetic fields, the chapters cover observational techniques, origin of magnetic fields, magnetic turbulence, basic processes in magnetized fluids, the role of magnetic fields for cosmic rays, in the interstellar medium and for star formation. Written by a group of leading experts the book represents an excellent overview of the field. Nonspecialists will find sufficient background to enter the field and be able to appreciate the state of the art.

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1985 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Simple Model of the Interplanetary Magnetic Field written by David Peter Stern and published by . This book was released on 1964 with total page 40 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 1972-04 with total page 1068 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Role of Chaos and Magnetic Fields in the Cosmic Ray Anisotropy written by Vanessa Maria López Barquero (Ph., D) and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cosmic rays are detected on Earth with an energy-dependent anisotropy in their arrival direction. Recent experimental results of this arrival distribution of high-energy cosmic rays (CRs) have motivated studies aimed at improving our understanding of the cosmic ray transport and their propagating media. This arrival distribution involves a convolution of the distribution of sources and the effects of the magnetic field properties through which particles propagate. Nonetheless, no comprehensive explanation has been put forth to date. Understanding what causes this cosmic-ray anisotropy and how we can use it to learn about the characteristics of the media they traverse are the central questions of this thesis. More specifically, this dissertation will explore the effects of magnetic fields and various magnetic structures on the anisotropy of arriving CRs from TeV to PeV scales. These contributions can impact the largest angular scale to the medium- and small-scale angular structures. This investigation centers around the effects of three physical processes: one on the chaotic behavior in coherent magnetic structures, another one on magnetic turbulence, and a third on heliospheric effects First, we detail the effects of chaos and trapping in coherent structures on the CR propagation. We apply a new method to characterize chaotic trajectories in bound systems. This method is based on the Finite-Time Lyapunov Exponent (FTLE), which determines the degree of chaos in the particles' trajectories. Furthermore, we model a coherent magnetic structure with time-perturbations that can be used to describe distinct magnetic systems and processes. Our results show that the FTLE, i.e., the level of chaos, is related to the CRs escape time from the system by a power-law relation. Additionally, this power law persists even if perturbations act on the system, pointing to the idea that this specific power law could be an essential parameter of the system. We also find that CRs can be divided into different categories according to their chaotic behavior. Moreover, these categories are distributed in specific regions in the arrival distribution maps. This means that various regions on the map could develop differently from one to another in time. Therefore, this result can provide the basis for time-variability in the CR arrival direction maps. We also discuss how turbulence in the interstellar medium can modify CR trajectories. To investigate this idea, we perform numerical integration of particle trajectories in compressible magnetohydrodynamic turbulence to study how the CRs arrival direction distribution is perturbed when streamed along the local turbulent magnetic field. We found that this inhomogeneous and turbulent interstellar magnetic field can imprint its structure on the CR maps. Another aspect explored is the heliospheric influence on particles with rigidities in the range of 1-10 TV. We test if anisotropies may arise from the interaction with the heliosphere. We employed a magnetic field model of the heliosphere for this goal and performed forward-propagating numerical calculations of particle trajectories. Our results show that the heliosphere can strongly redistribute the particles' directions, making it an indispensable component for the anisotropy. Finally, through these magnetic structures and mechanisms, we can learn about how CRs propagate and their arrival distribution. However, these particles can also act as probes for the properties of the different media they traverse and their places of origin. Therefore, the study of cosmic rays opens multiple doors for a better understanding of the universe.