Mach cones in dusty plasmas in planetary rings and in laboratory experiments

Havnes, O.; Li, F.; Hartquist, T. W.; Aslaksen, T.; Brattli, A.

doi:10.1016/s0032-0633(00)00127-6

Cited by 25 publications

(17 citation statements)

References 21 publications

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“…Shortly afterwards, shear-wave Mach cones composed of single cone, were observed in experiments by Nosenko et al [30,31] by using a laser beam. Inspired by the studies above, various theoretical models [32][33][34][35][36][37] have been proposed to interpret the observations. The experimental observations of Mach cones in 3D complex plasmas have been made with the help of the PK-3 Plus laboratory [39][40][41].…”

Section: Mach Cones In 3d Complex Plasmamentioning

confidence: 99%

Complex Plasma Research under Microgravity Conditions: PK‐3 Plus Laboratory on the International Space Station

Khrapak

Molotkov

Lipaev

et al. 2016

Contrib. Plasma Phys.

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Complex (dusty) plasmas are composed of weakly ionised gas and charged microparticles and represent the plasma state of soft matter. Due to the "heavy" component -the microparticles -and the low density of the surrounding medium, the rarefied gas and plasma, it is necessary to perform experiments under microgravity conditions to cover a broad range of experimental parameters which are not available on ground. The investigations have been performed onboard the International Space Station (ISS) with the help of the "Plasma Crystal-3 Plus" (PK-3 Plus) laboratory. It was perfectly suited for the formation of large stable liquid and crystalline systems and provided interesting insights into processes like crystallisation and melting, laning in binary mixtures, electrorheological effects due to ac electric fields and projectile interaction with a strongly coupled complex plasma cloud.

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Section: Mach Cones In 3d Complex Plasmamentioning

confidence: 99%

Complex Plasma Research under Microgravity Conditions: PK‐3 Plus Laboratory on the International Space Station

Khrapak

Molotkov

Lipaev

et al. 2016

Contrib. Plasma Phys.

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“…Mach cones are the V-shaped cone patterns visible in the laboratory around a charged body moving through, or close to, a layer of dusty plasma (Havnes et al 2001). They are the result of an application of low-frequency, long-wavelength electrostatic waves; dust acoustic waves in an unmagnetized dusty plasma.…”

Section: Mach Conesmentioning

confidence: 99%

The Charging of Planetary Rings

Graps

Jones²,

Juhász

et al. 2008

Space Sci Rev

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This chapter will review what is known about the charging of planetary rings, in particular the sum of the individual currents from the time-varying charge dQ/dt, of the planetary ring particle. For the smallest ring particles, in addition to checking the plasma conditions for the charging currents, one must consider if collective effects in the ring environment are relevant. Two planetary ring environments that have held a strong interest for ring scientists in the last two decades are Saturn's spokes in the B Ring and the environment of Saturn's E ring. Two sections of this chapter will describe these planetary ring charging environments in detail. Finally, we describe two charging effects that demonstrate areas of future studies while providing fresh examples of the intriguing effects from planetary ring charging processes.

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“…Several approximations and simplifications lead to that our results must be regarded as approximations to real Mach cone patterns. Details in our patterns, which will be important if Mach cones are to be used as a diagnostics tool 1,2,7 beyond that of only measuring the opening angle, will probably be different from real patterns in planetary rings, and there are several reasons for this.…”

Section: Discussionmentioning

confidence: 99%

“…If a sufficient amount of details in the Mach cone pattern around the moving body can be observed by spacecrafts such as CASSINI, moving above the rings, one can obtain information on many of the parameters describing the dusty plasma. 1,2,7 To be able to extract a maximum of information out of the observations, it is important to have a well developed theory for the excitation of Mach cones and the propagation of dust acoustic waves. In the following we will calculate the dust number density distribution in the Mach cone pattern generated around a boulder moving in a dusty plasma similar to what we expect to find in a planetary ring.…”

Section: Introductionmentioning

confidence: 99%

Wake patterns behind boulders in the rings of Saturn

2002

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The flow of charged dust around an electrically charged boulder moving through an environment thought to be typical of planatery rings is studied. As the boulder moves through the ring dust it will excite a V-shaped Mach cone pattern of a form and complexity which varies significantly with boulder size, relative velocity between the boulder and the dust, and with dust plasma conditions. Parameters relevant to the Saturnian ring system are used to compute examples which demonstrate the change in Mach cone patterns with the relevant parameters. Shortcomings of the model are discussed and ways to improve the calculations of Mach cone patterns are pointed out.

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Mach cones in dusty plasmas in planetary rings and in laboratory experiments

Cited by 25 publications

References 21 publications

Complex Plasma Research under Microgravity Conditions: PK‐3 Plus Laboratory on the International Space Station

Complex Plasma Research under Microgravity Conditions: PK‐3 Plus Laboratory on the International Space Station

The Charging of Planetary Rings

Wake patterns behind boulders in the rings of Saturn

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