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Signature of gyro-phase drift

Published online by Cambridge University Press:  08 January 2014

MARK E. KOEPKE ,
J. J. WALKER ,
M. I. ZIMMERMAN ,
W. M. FARRELL  and
V. I. DEMIDOV
MARK E. KOEPKE
Affiliation:
Department of Physics, West Virginia University, Morgantown, WV, 26506, USA (mark.koepke@mail.wvu.edu)
J. J. WALKER
Affiliation:
Department of Physics, West Virginia University, Morgantown, WV, 26506, USA (mark.koepke@mail.wvu.edu)
M. I. ZIMMERMAN
Affiliation:
Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, MD, 20771, USA
W. M. FARRELL
Affiliation:
Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, MD, 20771, USA
V. I. DEMIDOV
Affiliation:
Department of Physics, West Virginia University, Morgantown, WV, 26506, USA (mark.koepke@mail.wvu.edu) University ITMO, Kronverkskiy pr. 49, St. Petersburg 197101, Russia
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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.

Type
Papers
Information
Journal of Plasma Physics , Volume 79 , Special Issue 6: Special issue in memory of Professor Padma Kant Shukla 1950-2013 , December 2013 , pp. 1099 - 1105
Copyright
Copyright © Cambridge University Press 2013 

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References

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), 2097–2105.CrossRefGoogle Scholar
Barkan, A., D'Angelo, N. and Merlino, R. L. 1994 Charging of dust grains in a plasma. Phys. Rev. Lett. 73, 3093–3096.CrossRefGoogle ScholarPubMed
Bliokh, P., Sinitsin, V. and Yaroshenko, V. 1994 Dusty and Self-Gravitational Plasmas in Space. Dordrecht, The Netherlands: Kluwer.Google Scholar
Bliokh, P. V. and Yarashenko, V. V. 1985 Electrostatic waves in saturn's rings. Sov. Astron. 43, 330–336.Google Scholar
Goertz, C. K. and Morfill, G. 1983 A model for the formation of spokes in saturn's ring. Icarus 53 (2), 219–229.CrossRefGoogle Scholar
Goree, J. 1994 Charging of particles in a plasma. Plasma Sources Sci. Technol. 3 (3), 400.CrossRefGoogle Scholar
Grün, E.et al. 1993 Discovery of Jovian dust streams and interstellar grains by the ulysses spacecraft. Nature 362, 428–430.CrossRefGoogle Scholar
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), 236–254.CrossRefGoogle Scholar
Horanyi, M., Morfill, G. and Grün, E. 1993 Mechanism for the acceleration and ejection of dust grains from jupiter's magnetosphere. Nature 363, 144–146.CrossRefGoogle Scholar
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.Google Scholar
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), 1–11.CrossRefGoogle Scholar
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), 101–115.CrossRefGoogle Scholar
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, 1970–1973.CrossRefGoogle Scholar
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.CrossRefGoogle Scholar
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).CrossRefGoogle Scholar