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          Institute: MPI für extraterrestrische Physik     Collection: Theory & Complex Plasmas     Display Documents

ID: 5683.0, MPI für extraterrestrische Physik / Theory & Complex Plasmas
Compressional waves in complex (dusty) plasmas under microgravity conditions
Authors:Khrapak, S.; Samsonov, D.; Morfill, G.; Thomas, H.; Yaroshenko, V.; Rothermel, H.; Hagl, T.; Fortov, V.; Nefedov, A.; Molotkov, V.; Petrov, O.; Lipaev, A.; Ivanov, A.; Baturin, Y.
Date of Publication (YYYY-MM-DD):2003-01
Title of Journal:Physics of Plasmas
Journal Abbrev.:Phys. Plasmas
Issue / Number:1
Start Page:1
End Page:4
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Complex plasmas consist of electrons, ions and charged microparticles, with typical charge-to-mass ratios 1:10(-5): 10(-13). The interest in these systems has grown explosively, because they can be investigated at the kinetic level (the microparticles). However, on Earth the supporting forces (against gravity) are of the same order as the electrostatic interparticle forces-and hence only strongly compressed systems can be investigated. Under microgravity conditions these "body forces" are a factor 10(2) smaller which allows the experimental investigation of weakly compressed three- dimensional complex plasmas. One way to study these systems is by the controlled excitation of low-frequency compressional waves. The first such experiments, conducted with the PKE- Nefedov laboratory on the International Space Station is reported. The waves were excited by modulating the voltage on the rf electrodes. By varying the modulation frequency the dispersion relation was measured. The results are compared with existing theoretical models. (C) 2003 American Institute of Physics.
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für extraterrestrische Physik
External Affiliations:Max Planck Inst Extraterr Phys, Ctr Interdisciplinary Plasma; Sci, D-85740 Garching, Germany; Max Planck Inst Extraterr Phys, Ctr Interdisciplinary Plasma Sci, D-85740 Garching, Germany; Russian Acad Sci, Inst High Energy Densities, Moscow 127412, Russia; SP Korolev RSC Energia, Korolev 141070, Moscow Region, Russia; Yuri Gagarin Cosmonaut Training Ctr, Star City 141160, Moscow Region, Russia
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