Jongil Jung
(Chungnam National Uniyversity)
19/10/2015, 15:30
The level of solar activity determine the amount of cosmic radiation entering Earth’s atmosphere. The count of cosmic rays increase as solar minimum approaches. Neutron monitor is an instrument to measure neutrons by atmospheric secondary cosmic ray particles on ground-base. In 2011, a neutron monitor was installed at the Korea Research Institute of Standard Science (KRISS), Daejeon, South...
Nicola Tomassetti
(Centre National de la Recherche Scientifique (FR))
19/10/2015, 15:30
The study of antimatter particles in cosmic rays excites many physicists who believe in the possibility that these particles come from annihilation of dark matter particles. This possibility is very difficult to prove because antiparticles are also created
by collisions of ordinary cosmic rays with the interstellar medium. For example, collisions of energetic protons can produce antiprotons...
Mr
Gen Li
(University of New Hampshire)
19/10/2015, 15:30
Acceleration of GeV protons in magnetically well-connected strong GLEs tends to begin at ~2 solar radii whereas GLEs associated with shocks that begin above ~3 solar radii tend to compensate by having higher shock speeds. We present an analytical stationary diffusive shock acceleration model discussing the dependence of the upstream particle escape rate on the proton excited waves in the...
Mr
Diego Gomez Coral
(Instituto de Física, Universidad Nacional Autónoma de México (UNAM), México, D. F. 01000, Mexico.)
19/10/2015, 15:30
The determination of an antideuteron component in the cosmic-ray flux is one of the most interesting topics in the current search for exotic sources of antimatter, such as dark matter annihilation. Experiments like AMS-02 and GAPS were developed with, among others, the aim to search for a detectable antideuteron flux, over a wide energy range. In this task, it is also important to produce the...
Jongil Jung
(Chungnam National University)
19/10/2015, 15:30
For more than half a century, Neutron monitors have recorded the flux of galactic cosmic rays. During the recent, prolonged, deep minimum in solar activity, many sources indicate that modulated galactic cosmic rays have attained new Space Age highs. However, reported neutron monitor rates are ambiguous; some record new highs while others do not. This work examines the record of 15 long-running...
Dr
Ian Richardson
(University of Maryland)
19/10/2015, 15:30
Solar energetic particle events, specifically those including ~25 MeV protons, observed by the STEREO spacecraft and/or at the Earth since 2006 and cataloged by Richardson et al. (2014), show evidence of clustering in time during the rise of Solar Cycle 24, with groups of events occurring at intervals of around 6 months. By considering separately the occurrence rates of events with sources...
David Alain Maurin
(Centre National de la Recherche Scientifique (FR))
19/10/2015, 15:30
Top-of-atmosphere (TOA) cosmic-ray (CR) data from satellites and balloon-borne experiments are snapshots of the solar activity imprinted on the interstellar (IS) fluxes. Several snapshots are required to break the degeneracies between the 'unknown' IS flux shape and the modulation levels. Taking advantage of the recent high precision p and He data (AMS, BESS-Polar and PAMELA), we perform a fit...
Patrick Kühl
(University of Kiel)
19/10/2015, 15:30
Ground Level Enhancements (GLEs) are solar energetic particle (SEP) events that are recorded by ground-based instrumentation. The energy of the particles is so high that they produce secondary particles, i.e. protons and neutrons, which are detected as sudden increases in cosmic ray intensities measured by e.g. neutron monitors. Since the launch of SOHO in December 1995 the neutron monitor...
Dr
Frederic Effenberger
(Stanford University)
19/10/2015, 15:30
Recent multi-spacecraft Solar Energetic Particle (SEP) observations have challenged the traditional view of SEP production and interplanetary transport. The observations suggest fast SEP access to a wide range of heliographic longitudes. The recent case studies that fit the SEP observations with 3-dimensional diffusive SEP transport simulations suggest a narrow source region, and strong...
Bryan Yamashiro
(University of Hawaii at Manoa)
19/10/2015, 15:30
This study aims for a better interpretation of high-energy Solar Energetic Particle (SEP) events using the Alpha Magnetic Spectrometer (AMS-02), and the fleet of NASA solar observatories in space. Future space exploration is dependent on an understanding of the radiation environment through the Solar System. AMS-02 is a particle detector installed on the International Space Station (ISS) that...
Christian Steigies
(Institut für Experimentelle und Angewandte Physik Christian-Albrechts-Universität zu Kiel)
19/10/2015, 15:30
Since the International Geophysical Year (IGY) in 1957-58 cosmic rays are
routinely measured by many ground-based Neutron Monitors (NM) around the
world. The World Data Center for Cosmic Rays (WDCCR) was established as a
part of this activity and is providing a database of cosmic-ray neutron
observations in unified formats. However, that standard data comprises only
of one hour averages,...