Abstract
It is now evident that in large solar energetic particle (SEP) events,
particles are of- ten acceletated to MeV energies (and perhaps up to GeV
energies) at shock waves driven by coronal mass ejections (CMEs).These
energetic particles are of consider- able importance to space weather
studies since they serve as a precursor signal for possible disruptive
events at the Earth. As a CME-driven shock propagates, expands and
weakens, particles accelerated diffusively at the shock can escape
upstream and downstream into the interplanetary medium. These escaping
energized particles then propagate along the interplanetary magnetic
field, experiencing only weak scattering from fluctuations in the
interplanetary magnetic field (IMF). We have studied the time- dependent
transport of energetic particles accelerated at a propagating shock
using a Monte-Carlo approach. Such an approach allows us to obtain the
intensity profiles, particle spectrum, angular istribution as well as
the particle anisotropies. Such a study provides an excellent
theoretical basis for interpreting observations of high-energy particles
made at 1 AU by ACE and WIND.
Original language | English |
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Pages | 2885 |
Publication status | Published - 2002 |
Event | 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA - Houston, TX, USA, United States Duration: 10 Oct 2002 → 19 Oct 2002 |
Conference
Conference | 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA |
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Country/Territory | United States |
City | Houston, TX, USA |
Period | 10/10/02 → 19/10/02 |