Can I read Magnetic aggregation: II. Laboratory and microgravity experiments on EtoBox?

Magnetic aggregation: II. Laboratory and microgravity experiments by Henrik Nübold; Torsten Poppe; Michael Rost; Carsten Dominik; Karl-Heinz Glassmeier is a Physics and Astronomy article available to read on EtoBox.

What is Magnetic aggregation: II. Laboratory and microgravity experiments about?

In a previous publication (Dominik and Nübold, 2002, Icarus 157, 173-186), we presented analytical expressions and theoretical considerations concerning preplanetary dust aggregation with magnetized grains in the solar nebula. The present work is dedicated to the experimental study of magnetic aggregation in a ground-based laboratory as well as under microgravity conditions on parabolic flights. We conducted aggregation experiments with dust analogues in order to study the temporal evolution and the structural outcome of grain growth processes dominated by or comprising exclusively magnetic grains. Within aggregation times ranging from a couple of seconds to a few minutes only, formation of huge chain-like and/or web-like dust aggregates was observed. After aggregate retrieval we were able to study the sizes and structures of the aggregates in great detail. We established the fractal dimension of the aggregates as D fs = 1.20 ± 0.05 for single chains and D fc = 1.50 ± 0.21 for inter-connected web-like structures. This is considerably lower than for non-magnetic grain growth. The dynamic exponent z for the mass increase with time according to t z was found to be z = 2.7 from in-situ

Who reads Magnetic aggregation: II. Laboratory and microgravity experiments?

Author

Henrik Nübold; Torsten Poppe; Michael Rost; Carsten Dominik; Karl-Heinz Glassmeier

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV; Oxford University Press (OUP) (ISSN 0019-1035)

Published

2003

Language

EN

Field

Physics and Astronomy (Physical Sciences)