%0 Journal Article
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%@resumeid 8JMKD3MGP5W/3C9JH3D
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%X We present a new method of calculating cross-field diffusion of charged particles due to their interactions with interplanetary magnetic decreases (MDs) in high heliospheric latitudes. We use a geometric model that evaluates perpendicular diffusion to the ambient magnetic field as a function of particle's gyroradius, MD radius, ratio between fields outside and inside the MD, and a random impact parameter. We use Ulysses magnetic field data of 1994 to identify the MDs and get the empirical size and magnetic field decrease distribution functions. We let protons with energies ranging from 100 key to 2 MeV interact with MDs. The MD characteristics are taken from the observational distribution functions using the Monte Carlo method. Calculations show that the increase in diffusion tends to saturate when particles' gyroradius becomes as large as MD radii, and that particles' gyroradius increases faster than diffusion distance as the energy of the particles is increased.
%8 Jul
%N 11-12
%T A computational study of nonresonant cross-field diffusion of energetic particles due to their interaction with interplanetary magnetic decreases
%@electronicmailaddress junior@plasma.inpe.br
%@electronicmailaddress eecher@dge.inpe.br
%@electronicmailaddress virginia@plasma.inpe.br
%@secondarytype PRE PI
%K Magnetic decreases, Particles diffusion, Nonresonant interactions, Monte Carlo simulation.
%@archivingpolicy denypublisher denyfinaldraft24
%@usergroup administrator
%@usergroup lattes
%@usergroup tereza@sid.inpe.br
%@group LAP-CTE-INPE-MCT-BR
%@group DGE-CEA-INPE-MCT-BR
%@group GB-GB-INPE-MCT-BR
%@group
%@group LAP-CTE-INPE-MCT-BR
%@group DGE-CEA-INPE-MCT-BR
%@e-mailaddress eecher@dge.inpe.br
%3 CostaJr-JASTP-v73-n11-2-p1405-9-science[1].pdf
%@secondarymark B2_ASTRONOMIA_/_FÍSICA B1_CIÊNCIAS_BIOLÓGICAS_I B1_ECOLOGIA_E_MEIO_AMBIENTE B1_ENGENHARIAS_IV B1_GEOCIÊNCIAS A2_INTERDISCIPLINAR
%F lattes: 3869820274542343 2 CostaEcAlTsSiCaLa:2011:ACoSt
%@issn 1364-6826
%2 dpi.inpe.br/plutao/2011/09.22.17.02.42
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, United States
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Indian Institute of Geomagnetism, Navi Mumbai, India
%@project CNPq[140441/2006-9, FAPESP[2008/01288-0
%B Journal of Atmospheric and Solar-Terrestrial Physics
%@versiontype publisher
%P 1405-1409
%4 dpi.inpe.br/plutao/2011/09.22.17.02.41
%@documentstage not transferred
%D 2011
%V 73
%@doi 10.1016/j.jastp.2011.01.022
%A Costa Júnior, Edio da,
%A Echer, Ezequiel,
%A Alves, Maria Virginia,
%A Tsurutani, Bruce T,
%A Simões Júnior, Fernando Jaques Ruiz,
%A Cardoso, Flávia Reis,
%A Lakhina, G. S.,
%@dissemination WEBSCI; PORTALCAPES; AGU; MGA; COMPENDEX.
%@area CEA