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Signature of gyro-phase drift

  • MARK E. KOEPKE (a1), J. J. WALKER (a1), M. I. ZIMMERMAN (a2), W. M. FARRELL (a2) and V. I. DEMIDOV (a1) (a3)...

Abstract

Gyro-phase drift is a guiding center drift that is directly dependent on the charging rate limit of dust grains. The effect of introducing a gyro-phase-dependence on the grain charge leads to two orthogonal components of guiding-center drift. One component, referred to here as grad-q drift, results from the time-varying, gyro-phase angle dependent, in-situ-equilibrium grain charge, assuming that the grain charging is instantaneous. For this component, the grain is assumed to be always in its in-situ-equilibrium charge state and this state gyro-synchronously varies with respect to the grain's average charge state. The other component, referred to here as the gyro-phase drift, arises from any non-instantaneous-charging-induced modification of the diamagnetic drift and points in the direction of -∇RLd (where RLd is the grain gyro-radius), i.e. the direction associated with increasing magnitude of in-situ-equilibrium charge state. For this component, the grain gyro-synchronously undercharges and overcharges with respect to its gyro-synchronously varying, in-situ-equilibrium charge state. These characteristics are illustrated with a single-particle code for predicting grain trajectory that demonstrates how gyro-phase drift magnitude and direction could be exploited, using an extended version of the presented model, as sensitive indicators of the charging time of dust grains because of the cumulative effect of the ever-changing charge state of a grain making repeated excursions in inhomogeneous plasma over many gyro-periods.

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Amatucci, W. E., Walker, D. N., Gatling, G. and Scime, E. E. 2004 Direct observation of microparticle gyromotion in a magnetized direct current glow discharge dusty plasma. Phys. Plasmas 11 (5), 20972105.
Barkan, A., D'Angelo, N. and Merlino, R. L. 1994 Charging of dust grains in a plasma. Phys. Rev. Lett. 73, 30933096.
Bliokh, P., Sinitsin, V. and Yaroshenko, V. 1994 Dusty and Self-Gravitational Plasmas in Space. Dordrecht, The Netherlands: Kluwer.
Bliokh, P. V. and Yarashenko, V. V. 1985 Electrostatic waves in saturn's rings. Sov. Astron. 43, 330336.
Goertz, C. K. and Morfill, G. 1983 A model for the formation of spokes in saturn's ring. Icarus 53 (2), 219229.
Goree, J. 1994 Charging of particles in a plasma. Plasma Sources Sci. Technol. 3 (3), 400.
Grün, E.et al. 1993 Discovery of Jovian dust streams and interstellar grains by the ulysses spacecraft. Nature 362, 428430.
Gurnett, D. A., Grün, E., Gallagher, D., Kurth, W. S. and Scarf, F. L. 1983 Micron-sized particles detected near saturn by the voyager plasma wave instrument. Icarus 53 (2), 236254.
Horanyi, M., Morfill, G. and Grün, E. 1993 Mechanism for the acceleration and ejection of dust grains from jupiter's magnetosphere. Nature 363, 144146.
Konopka, U. and Morfill, G. 2003 Magnetic field driven effects in complex plasmas. In International Topical Conference on Plasma Physics. Santovini, Greece. 8–12 September 2003.
Northrop, T. G. and Hill, J. R. 1983 The adiabatic motion of charged dust grains in rotating magnetospheres. J. Geophys. Res. Space Phys. 88 (A1), 111.
Northrop, T. G., Mendis, D. A. and Schaffer, L. 1989 Gyrophase drifts and the orbital evolution of dust at jupiter's gossamer ring. Icarus 79 (1), 101115.
Nunomura, S., Misawa, T., Ohno, N. and Takamura, S. 1999 Instability of dust particles in a coulomb crystal due to delayed charging. Phys. Rev. Lett. 83, 19701973.
Thomas, E., Merlino, R. L. and Rosenberg, M. 2012 Magnetized dusty plasmas: the next frontier for complex plasma research. Plasma Phys. Control. Fusion 54 (12), 124034.
Walker, J. J., Koepke, M. E., Zimmerman, M. I., Farrell, W. M. and Demidov, V. I. 2013 Analytical model for gyro-phase drift arising from abrupt inhomogeneity. J. Plasma Phys. (To appear).
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Signature of gyro-phase drift

  • MARK E. KOEPKE (a1), J. J. WALKER (a1), M. I. ZIMMERMAN (a2), W. M. FARRELL (a2) and V. I. DEMIDOV (a1) (a3)...

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