Self-Consistent hot spot tracing particles by kinetic simulations: With the emphasis on Cusp particle entry

نویسندگان

1 موسسه ژئوفیزیک دانشگاه تهران

2 پسا دکتری

چکیده

One of the most important advantages of particle simulation as compared to fluid simulation is the capacity for working with and tracing particles. In particle simulations, the test particle method is usually used to get some idea of the behavior of plasma or other substances. In this method, first, a small number of particles are injected into the frame of static electromagnetic fields. Then, movement of particles is investigated using the pattern of the electromagnetic fields. This method is useful; however, as it is needed to work with non self-consistent fields, it lacks precision. In this work, we adapted the particle simulations method, adding the flexibility of working with self-consistent fields that come directly from the simulation. Here we have tried to investigate particle entry from the solar wind with northward Interplanetary Magnetic Field (IMF) to the magnetospheric cusp. As our initial results show, self-consistent path of particles does not follow the magnetic field lines going to the cusp that is slightly in contrast to the conventional non self-consistent results from test particle method.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Self-Consistent hot spot tracing particles by kinetic simulations: With the emphasis on Cusp particle entry

چکیده [English]

One of the most important advantages of particle simulation as compared to fluid simulation is the capacity for working with and tracing particles. In particle simulations, the test particle method is usually used to get some idea of the behavior of plasma or other substances. In this method, first, a small number of particles are injected into the frame of static electromagnetic fields. Then, movement of particles is investigated using the pattern of the electromagnetic fields. This method is useful; however, as it is needed to work with non self-consistent fields, it lacks precision. In this work, we adapted the particle simulations method, adding the flexibility of working with self-consistent fields that come directly from the simulation. Here we have tried to investigate particle entry from the solar wind with northward Interplanetary Magnetic Field (IMF) to the magnetospheric cusp. As our initial results show, self-consistent path of particles does not follow the magnetic field lines going to the cusp that is slightly in contrast to the conventional non self-consistent results from test particle method.

One of the most important advantages of particle simulation as compared to fluid simulation is the capacity for working with and tracing particles. In particle simulations, the test particle method is usually used to get some idea of the behavior of plasma or other substances. In this method, first, a small number of particles are injected into the frame of static electromagnetic fields. Then, movement of particles is investigated using the pattern of the electromagnetic fields. This method is useful; however, as it is needed to work with non self-consistent fields, it lacks precision. In this work, we adapted the particle simulations method, adding the flexibility of working with self-consistent fields that come directly from the simulation. Here we have tried to investigate particle entry from the solar wind with northward Interplanetary Magnetic Field (IMF) to the magnetospheric cusp. As our initial results show, self-consistent path of particles does not follow the magnetic field lines going to the cusp that is slightly in contrast to the conventional non self-consistent results from test particle method.

One of the most important advantages of particle simulation as compared to fluid simulation is the capacity for working with and tracing particles. In particle simulations, the test particle method is usually used to get some idea of the behavior of plasma or other substances. In this method, first, a small number of particles are injected into the frame of static electromagnetic fields. Then, movement of particles is investigated using the pattern of the electromagnetic fields. This method is useful; however, as it is needed to work with non self-consistent fields, it lacks precision. In this work, we adapted the particle simulations method, adding the flexibility of working with self-consistent fields that come directly from the simulation. Here we have tried to investigate particle entry from the solar wind with northward Interplanetary Magnetic Field (IMF) to the magnetospheric cusp. As our initial results show, self-consistent path of particles does not follow the magnetic field lines going to the cusp that is slightly in contrast to the conventional non self-consistent results from test particle method.

کلیدواژه‌ها [English]

  • self-consistent hot spot tracing
  • cusp particle entry
  • test particles method
  • IMF
  • Solar wind
  • Magnetosphere

مراجع

Buneman, O., 1993, TRISTAN, in Computer Space Plasma Physics: Simulation Techniques and Software,” edited by H. Matsumoto and Y. Omura, pp. 67-84, Terra Sci., Tokyo.
Buneman, O., Nishikawa, K. I. and Neubert, T., 1995, Solar wind-magnetosphere interaction as simulated by a 3D EM particle code, in Space Plasmas: Coupling Between Small and Medium Scale Processes, Geophys. Monogr. Ser., edited by M. Ashour-Abdalla, T. Chang,and P. Dusenburg, AGU, Washington, D. C., 86, 347-352.
Cai, D. S., Li, Y., Nishikawa, K. H., Xiao, C., Yan, X. and Pu, Z., 2003, Parallel 3D electromagnetic particle code using high performance Fortran: Parallel TRISTAN, in Space Plasma Simulation, pp. 25-53, Springer, New York.
Cai, D., Yan, X. Y., Nishikawa, K. I., and Lembege, B., 2006, Particle entry into the inner magnetosphere during duskward IMF By: Global three-dimensional electromagnetic full particle simulations, Geophys. Res. Lett. , 33, L12101, doi: 10.1029/2005GL023520.
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Lavraud, B., Fedorov, A., Budnik, E., Thomsen, M. F., Grigoriev, A., Cargill, P. J., Dunlop, M. W., Rème, H., Dandouras, I. and Balogh, A., 2005, High-altitude cusp flow dependence on IMF orientation: A 3-year Cluster statistical study, Journal of Geophysical Research, 110, A02209, 2005, doi: 10.1029/2004JA010804.
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Nishikawa, K. I., 1998, Particle entry through reconnection grooves in the magnetopause with a dawnward IMF as simulated by a 3D EM particlecode, Geophys. Res. Lett., 25, 1609-1612.
Nishikawa, K. I. and Ohtani, S., 2002, Particle simulation study of sub-storm triggering with a southward IMF, Adv. Space Res., 30(12), 2675-2681.
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http://www.igpp.ucla.edu/people/rwalker/Publications/mono13333.pdf.
 
 
 
فیزیک زمین و فضا
دوره 42، شماره 4
دی 1395
صفحه 73-79

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