Silvia Dalla
(University of Central Lancashire)
30/07/2015, 15:30
SH-TH
Poster contribution
In recent years, a wealth of spacecraft measurements of heavy ion solar energetic particles have become available, thanks to data from the ACE and STEREO spacecraft. Interesting features in heavy ion time intensity profiles, such as the decay of the Fe/O ratio over time in some events, have been observed. Heliospheric propagation effects have been invoked in the literature as a possible cause...
Richard Mewaldt
(Caltech)
30/07/2015, 15:30
SH-EX
Poster contribution
During solar cycle 23 it has been possible to routinely measure Solar Energetic Particle (SEP) Events over ~360 deg. in longitude with the combination of STEREO and near-Earth assets like ACE, SOHO, and GOES. It is found that SEPs are distributed more broadly in longitude than was appreciated based on single-point measurements. We report on a survey of large SEP events from 3 points of view as...
Xi Luo
(SIGMA Weather Group, State Key Laboratory of Space Weather, Center for Space Science and Applied Research, CAS, Beijing, China)
30/07/2015, 15:30
SH-TH
Poster contribution
Based on a hybrid galactic cosmic ray transport model, which incorporated MagnetoHydroDynamics (MHD) global heliospheric data into Parker's cosmic ray transport equation, we studied the behaviour of the transport of galactic cosmic rays near the heliopause (HP). We found that: (1) By increasing the ratio of the parallel diffusion coefficient to the perpendicular diffusion coefficient in the...
Dr
Sergio Dasso
(Instituto de Astronomía y Física del Espacio (UBA-CONICET), Buenos Aires, Argentina. Departamento de Ciencias de la Atmósfera y los Océanos and Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), Buenos Aires, Argentina)
30/07/2015, 15:30
SH-EX
Poster contribution
The Latin American Giant Observatory (LAGO) consist in a network of water-Cherenkov detectors (WCD) located in nine countries of Latin America, to study with extreme detail the flux of cosmic rays (CRs) from ground level. The main scientific aims are oriented to address several problems of astrophysics, space physics and atmospheric physics. In particular, LAGO has started to develop an...
Mr
Firas Al-Hamadani
(University of Turku and University of Basrah)
30/07/2015, 15:30
SH-EX
Poster contribution
On March 17-18, 2003 the Energetic and Relativistic Nuclei and Electrons (ERNE) instrument on board the Solar and Heliospheric Observatory (SOHO) spacecraft observed three solar energetic particle (SEP) events in rapid succession (within 26 hours) from the same active region of the Sun. The first event was weak and proton intensity enhancement was observed only below 25 MeV. No coincident...
Michael Alania
(Siedlce University), Dr
Renata Modzelewska
(Siedlce University)
30/07/2015, 15:30
SH-EX
Poster contribution
We study seasonal distributions of the visually observed cloudless days (CD) and cloudless nights (CN) at Abastumani Astrophysical Observatory (41.75N, 42.82E; Georgia) and the galactic cosmic ray (GCR) intensity in 1957-1993. The annual variations of monthly numbers of CD and CN have been observed, with maximum in August for CD and in September for CN. During geomagnetic disturbances it is...
Abdullrahman Maghrabi
(King Abdulaziz City For Science and Technology)
30/07/2015, 15:30
SH-EX
Poster contribution
To study the dependence of the muon rate flux on temperature we need to have some measure of atmospheric temperature above the detection site. Atmospheric weighted temperature, known also as the effective temperature, is defined as the temperature of an isothermic atmosphere that reflects the temperature of the real atmosphere with its varying conditions. In this paper, the influence of the...
Anastasia Petukhova
(Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy)
30/07/2015, 15:30
SH-TH
Poster contribution
Acceleration of solar energetic particles by the shock generated by the coronal mass ejection is calculated. The external boundary of coronal mass ejection and the shock front are specified as the segments of spherical surfaces with the different radii moving in coordination. Nonstationarity of process, spherical symmetry and adiabatic losses of particle energy in the extending environment are...
Stephen Kahler
(Air Force Research Laboratory)
30/07/2015, 15:30
SH-EX
Poster contribution
We review recent work on 111 Fe-rich impulsive solar energetic (~3 MeV/nuc) particle (SEP) events observed from 1994 to 2013. Strong elemental abundance enhancements scale with A/Q, the ion mass-to-charge ratio, as (A/Q)^(a), where 2 < a < 8 for different events. Most Fe-rich events are associated with both flares and coronal mass ejections (CMEs), and those with larger a are associated with...
Prof.
Kumar Rajiv
(Government Pench Valley post Graduate College Parasia)
30/07/2015, 15:30
SH-TH
Poster contribution
ABSTRACT: In this paper,we have provided an overview of effects of cosmic radiation on terrestrial processes such as cloud formation,cloud coverage, lightning,global electrical circuit ,etc.It is evolved empirically that cosmic rays control short-term and long-term variations in climate.we also explained that how additional ionization produced by cosmic rays could enhance charging rate and...
Prof.
Guiming Le
(National Satellite Meteorological Administration, CMA, China)
30/07/2015, 15:30
SH-EX
Poster contribution
To investigate the possible acceleration mechanism for high energy (E>100 MeV) protons, the correlation coefficients (CCs) are calculated between the prompt component intensity (PCI) of E>100 MeV solar proton events (SPEs) and the speed of coronal mass ejections (CMEs), and the soft X-ray (SXR) emission of solar flares. Data analysis shows that the CCs between the PCI of E>100 MeV SPEs and the...
Dr
Sergey Aleksandrin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 31 Kashirskoe shosse, 115409 Moscow, Russia)
30/07/2015, 15:30
SH-EX
Poster contribution
The results of the observation of short-term and long-term variations of relativistic electron flux in the region of outer radiation belt in satellite experiments ARINA and VSPLESK are presented. Scintillation spectrometers ARINA (on board the Resurs-DK1 Russian satellite, since 2006) and VSPLESK (on board the International Space Station, since 2008), developed by MEPhI, provide continuous...
Alexander Mishev
(INRNE-BAS)
30/07/2015, 15:30
SH-TH
Poster contribution
An important topic in the field of space weather research is estimation of the expected effective dose of aircrew at flight altitudes due to cosmic rays of solar and galactic origin. The primary cosmic ray particles induce a complicated nuclear-electromagnetic-muon cascade in the Earth atmosphere. The secondary particles form the main source of increased exposure at flight latitudes compared...
Prof.
Huanyu Jia
(Southwest Jiaotong University)
30/07/2015, 15:30
SH-EX
Poster contribution
The shadow that the Sun casts on high energy cosmic rays is affected by the interplanetary and solar magnetic fields and has been shown to vary according to the solar rotation and activity cycle. Using the data of the ARGO-YBJ experiment, a large-area air shower detector located at high mountain altitude (4300 m a.s.l., in Tibet, China), the deficit of \sim 5 TeV cosmic rays due to the Sun...
Patrick Kühl
(University of Kiel)
30/07/2015, 15:30
SH-IN
Poster contribution
The solar modulation of galactic cosmic rays (GCR) can be studied in detail by long term variations of the GCR energy spectrum (e.g. on the scales of a solar cycle). With almost 20 years of data, the Electron Proton Helium INstrument (EPHIN) aboard SOHO is well suited for these kind of investigations.
Although the design of the instrument is optimized to measure proton and helium isotope...
Dr
Pankaj Kumar Shrivastava
(Govt.Model Science College,Rewa(M.P.))
30/07/2015, 15:30
SH-EX
Poster contribution
The Coronal Mass Ejections generally occur in large numbers during the period of high solar activity carry large amount of 1025 J and 1013 kg of plasma into interplanetary medium]. The fast CMEs coming from the Sun into interplanetary space are the solar coronal features that contain high magnetic field having the capability to produce interplanetary disturbances. CMEs travelling at different...
Dr
Olga Malandraki
(IAASARS, National Observatory of Athens, Athens, Greece)
30/07/2015, 15:30
SH-TH
Poster contribution
Solar energetic particles are of prime astrophysical interest, but are also a space weather hazard motivating the development of predictive capabilities. The HORIZON 2020 project 'HESPERIA' will produce two novel Solar Energetic Particle (SEP) operational forecasting tools based upon proven concepts (UMASEP, REleASE). At the same time it will advance our understanding of the physical...
Patrick Kühl
(University of Kiel)
30/07/2015, 15:30
SH-IN
Poster contribution
In order to improve the separation of helium isotopes 3He and 4He measured by the Electron Proton Helium Instrument (EPHIN) aboard the Solar and Heliospheric Observatory (SOHO), we used Monte Carlo simulations to understand the instrument’s response to incoming particles. The identification of different isotopes is based on the dE/dx-E-method. For an ideal telescope with the energy loss ΔE...
Allan Labrador
(California Institute of Technology)
30/07/2015, 15:30
SH-EX
Poster contribution
Mean ionic charge states for SEP events can reflect source temperatures, stripping during acceleration and transport, and the composition of source material. Multi-spacecraft measurements of mean ionic charge states for single SEP events can also demonstrate longitudinal dependence. At previous conferences, we have reported estimates of inferred high-energy ionic charge states for SEP events....
Eino Valtonen
(University of Turku)
30/07/2015, 15:30
SH-EX
Poster contribution
We have surveyed the SOHO/ERNE data from the beginning of the mission until the end of 2014 for solar particle events with enhancements in the Fe/C and Fe/O intensity ratio in energy ranges 5-15 MeV per nucleon and 50-150 MeV per nucleon. We have studied the relative abundances and spectral properties of heavy ions (C, N, O, Ne, Mg, Si, S, Ca, Fe) in these events. We have also studied the...
Karoly Kecskemety
(Wigner Research Centre, Budapest, Hungary)
30/07/2015, 15:30
SH-EX
Poster contribution
Simultaneously with 27-day variations of Jovian electrons of MeV energies, observed during the deep solar minimum in 2007-2008 in 14 consequent solar rotations, short duration (2-3 days) enhancements of the fluxes of 0.1-1 MeV electrons and protons were registered. These enhancements took place at each solar rotation simultaneously at SOHO (EPHIN and LION) and ACE (EPAM) and appeared earlier...
Stephany Vargas
(Escuela Politécnica Nacional)
30/07/2015, 15:30
SH-EX
Poster contribution
The Latin American Giant Observatory (LAGO) is an astroparticle network focused in the study of the phenomenology of Cosmics Rays (CR) in different energy ranges, using water Cherenkov Detectors(WCD). Ecuador has been working in the LAGO project for almost 3 years in which three detectors had been placed in different universities of the country (one in the city of Riobamba and two in the city...
Peter Zelina
(University of Central Lancashire)
30/07/2015, 15:30
SH-EX
Poster contribution
Solar Energetic Particles (SEPs) released during flares and coronal mass ejections can be detected by spacecraft widely separated in longitude. The mechanism by which this transport across the magnetic field takes place remains unclear.
Studies of SEP events simultaneously detected by multiple spacecraft have mostly focussed on electron and proton data. Here we consider multi-spacecraft...
Simon Thomas
(University College London)
30/07/2015, 15:30
SH-EX
Poster contribution
Galactic cosmic ray (GCR) flux is modulated by both particle drift patterns and solar wind structures on a range of time scales. Over solar cycles, GCR flux varies as a function of the total open solar magnetic flux and the latitudinal extent of the heliospheric current sheet. Over time-scales of hours, drops of a few percent in near-Earth GCR flux (Forbush decreases, FDs) are well known to be...
Donald Ngobeni
(Vaal University of Technology)
30/07/2015, 15:30
SH-TH
Poster contribution
Low-energy galactic electrons (1-200 MeV) are significantly modulated, almost extraordinary, in the heliosheath in contrast to the rest of the heliosphere, indicating that modulation conditions in the heliosheath are quite different for these particles. In addition, Jovian electrons completely dominate galactic electrons at Earth below about 30 MeV. Low-energy protons and helium (1-100...
Eino Valtonen
(University of Turku)
30/07/2015, 15:30
SH-EX
Poster contribution
We investigate associations of solar energetic particle events with multiple solar eruptions incorporating both coronal mass ejections (CMEs) and intense flares. Searching through the time period from 1996 to the end of 2013 we found three series of eruptions with start times occurring in a time window of less than two days and consisting of at least three fast and wide CMEs from the same...
Lev Pustilnik
(Israel Cosmic Ray Center, and Tel Aviv University)
30/07/2015, 15:30
SH-TH
Poster contribution
The discussion on the principal possibility of a causal chain from solar activity – Space Weather to the earth climate and up to agriculture response continues over 200 years (Herschel,1801). We show that the root of the critics of this possibility lies in the conception (accepted default) of the universality of the solar-terrestrial connection (STC). This default paradigm of universality of...
Dr
Olga Kryakunova
(Instutute of Ionosphere, Almaty, Kazakhstan)
30/07/2015, 15:30
SH-EX
Poster contribution
Changes of indices of geomagnetic activity, and also cosmic ray density and anisotropy in high-speed streams of a solar wind from various solar coronal holes are studied. About 350 coronal holes observed in 1996-2013 were divided into groups taking into account their polarity and heliolatitude. It is shown that northern holes with negative polarity and the southern holes with positive polarity...
Du Toit Strauss
(North-West University, South Africa)
30/07/2015, 15:30
SH-TH
Poster contribution
Observations show that solar energetic particles, even those accelerated during smaller impulsive events, are transported very effectively across the background magnetic field; at 1 AU, particle intensities may extend up to 360 degrees in longitude in extreme cases. We present modeling results of such events, examining the effectiveness of mainly perpendicular diffusion. In our model, we...
Karel Kudela
(IEP SAS Kosice, Slovakia)
30/07/2015, 15:30
SH-EX
Poster contribution
The main scientific task of JEM-EUSO is to observe the ultra high energy cosmic rays by looking the atmosphere from space. On one hand the detailed description and study of various sources of the background is important (e.g. Bertaina et al., 2014). On the other hand, the study of selected magnetospheric and ionospheric processes leading to temporal and spatial variability of UV on the orbit...
Prof.
Bernd Heber
(University of Kiel),
Patrick Kühl
(University of Kiel)
30/07/2015, 15:30
SH-EX
Poster contribution
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
Rolf Bütikofer
(Physikalisches Institut, University of Bern / HFSJG, Bern, Switzerland)
30/07/2015, 15:30
SH-EX
Poster contribution
The investigation of solar cosmic ray events based on neutron monitor measurements requires detailed knowledge about the trajectories of charged particles in the Earth's magnetic field. This information is needed with a high time resolution and for the current level of disturbance of the geomagnetic field. The determination of cutoff rigidities and asymptotic directions by the standard...
Temir Zharaspayev
(National Research Nuclear University MEPhI)
30/07/2015, 15:30
SH-EX
Poster contribution
Various local geophysical phenomena, like thunderstorms and earthquakes can be the cause for particle precipitation from Earth radiation belt. Longitudinal particle drift period is known to be dependent from its energy, due to this fact: using particles energy spectrum data change in time, it is possible to determine distances between locations of precipitation and registration on board of...
tokonatsu yamamoto
(Konan University)
30/07/2015, 15:30
SH-EX
Poster contribution
Hard X-ray bremsstrahlung, gamma-ray lines, and >100 MeV gamma-ray emission were observed by Fermi during a 50 s burst from the M2-class X-ray flare (Ackermann et. 2012). The neutron-capture line was also observed (25 gamma/cm2 indicating that tens of MeV neutrons were produced at the Sun. From this measurement we estimate that the neutron fluence at Earth would have been about 5 neutrons/cm2...
Stephen Kahler
(Air Force Research Laboratory)
30/07/2015, 15:30
SH-EX
Poster contribution
Prompt onsets and short rise times to peak intensities Ip have been noted in a few solar energetic (E > 10 MeV) particle (SEP) events from far behind the west limb. We discuss 14 archival and recent examples of these prompt events, giving their source longitudes, onset and rise times, and associated CME speeds. Their timescales and CME properties are not exceptional in comparison to a larger...
Eino Valtonen
(University of Turku)
30/07/2015, 15:30
SH-EX
Poster contribution
We investigate occurrence and characteristics of solar energetic particle (SEP) events related to full halo coronal mass ejections (FHCMEs) from source locations close to the central meridian of the Sun. From the halo CME catalog of Gopalswamy et al (2010) we selected CMEs detected between 1996 and end of 2014 which originated from source locations between longitudes E10 and W10 and divided...
tokonatsu yamamoto
(Konan University)
30/07/2015, 15:30
SH-EX
Poster contribution
In association with three large solar flares observed in 2012 March 5th (X1.1), 7th (X5.4) and 9th (M6.3), the solar neutron detector SEDA-FIB onboard the International Space Station has detected several events from solar direction. In this paper we present the time profiles of those neutrons and discuss the physics that may be related with a possible acceleration scenario of ions over the...
Dr
Grigory Protopopov
(Branch JSC URSC-ISDE)
30/07/2015, 15:30
SH-EX
Poster contribution
In the paper we are presenting processing results of flight data from METEOR-M spacecraft, which are been supplying in the Roscosmos space radiation exposure on electronic components Monitoring System by Fedorov Institute of Applied Geophysics. METEOR-M spacecraft operates in polar orbit 832 km altitude with inclination of ~99 degrees. The spacecraft contains spectrometers to measure particle...
Renier Burger
(North-West University)
30/07/2015, 15:30
SH-TH
Poster contribution
Ab initio modulation models require a number of turbulence quantities as input for any reasonable diffusion tensor. While turbulence transport models describe the radial evolution of such quantities, they in turn require observations in the inner heliosphere as input values. To study long-term modulation requires turbulence data over at a least a solar magnetic cycle. As a start we analyze...
Mr
RAJIV KUMAR
(GOVERNMENT PENCH VALLEY POST GRADUATE COLLEGE PARASIA)
30/07/2015, 15:30
SH-EX
Poster contribution
A detailed investigation on geoeffectiveness of Coronal Mass Ejections [CMEs] associated with Magnetic Clouds [ MCs ] observed during 1996-2009 have been studied. The collected sample events are divided into two groups based on their association with CMEs related to geomagnetic storms, Dst ≤ -50 nT eg. 1. geoeffective events & 2. For nongeoeffective events, Dst ≥ -50 nT. Other field parameters...
Karoly Kecskemety
(Wigner Research Centre, Budapest, Hungary)
30/07/2015, 15:30
SH-EX
Poster contribution
Ion energy spectra and abundance ratios were studied in 0.04-2 MeV/nucleon ion fluxes using ACE/ULEIS data during the solar minimum between solar cycles 23 and 24. The unique prolonged minimum of 2006-2009 permitted to select 35 quiet time periods when suprathermal ion fluxes from near equatorial coronal holes (CH) were observed at 1 AU. The values of relative ion abundances indicate the...
Christian Sarmiento-Cano
(Universidad Industrial de Santander)
30/07/2015, 15:30
SH-EX
Poster contribution
The Latin American Giant Observatory (LAGO) is an extended Cosmic Ray (CR) observatory operating in nine Latin American countries. Within the LAGO framework, several scientific and academic programs are being developed and conducted. One of them, the LAGO Space Weather program, aims to produce real time, high time resolution and high quality data of the flux of secondary particles at each site...
Dr
Sergey Aleksandrin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
30/07/2015, 15:30
SH-EX
Poster contribution
Dynamics of flux of high-energy charged particles trapped by geomagnetic field has been studied in this paper. As is known the Earth's magnetic field changes in direction and magnitude, as a result of this the South Atlantic Anomaly (SAA) region drifts. Using data of satellite experiments ARINA and VSPLESK geographical distributions of proton flux (80-100 MeV) were studied since 2006 to 2014....
Matteo Duranti
(Universita e INFN, Perugia (IT))
30/07/2015, 15:30
SH-EX
Poster contribution
In this contribution we present the calculation of a realistic, time dependent geomagnetic cutoff along the International Space Station orbit, at ?400 km above the Earth?s surface with an inclination of 51.6 degrees. For this work, based on the analysis of data collected by the AMS02 experiment during the first year of operation, the TS05 and IGRF models have been employed, including the...
Vladimir Mikhailov
(NRNU MEPHI)
30/07/2015, 15:30
SH-EX
Poster contribution
The PAMELA and the ARINA experiments onboard satellite RESURS-DK1 are carried out since 2006 up to now. PAMELA instrument in the first place is intended to measure of high energy antiparticles in cosmic rays while main purpose of the ARINA instrument is study of high-energy charged particle bursts in the magnetosphere. Both these experiments have possibility to study protons in the inner...
Dr
Vladimir Makhmutov
(Lebedev Physical Institute of the Russian Academy of Sciences)
30/07/2015, 15:30
SH-EX
Poster contribution
We present and discuss the cosmic ray increases detected with the CARPET cosmic ray instruments during several solar flares in 2011-2013. The CARPET cosmic ray detectors were installed at El Leoncito Astronomical Complex (CASLEO; Argentina) in 2006 and at CERN (Switzerland) in 2009. We compare the CARPET data with the X-ray and proton data from GOES and Fermi LAT/GBM measurements as well as...