Complex Plasmas in External Fields: The Role of Non-Hamiltonian Interactions

Ivlev, A. V.; Thoma, Markus H.; Räth, C.; Joyce, G.; Morfill, G. E.

doi:10.1103/physrevlett.106.155001

Cited by 54 publications

(40 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the latter case the negatively charged dust particle together with the screening ion cloud creates a dipole type field (see illustration in figure 5(a)) [39]. This leads to a model of a point-like ion wake charge (see figure 5(a)) which was successfully used in simulations and allowed for a detailed investigation as well as a deeper understanding of various phenomena [39][40][41][42]. By analogy, based on wake picture in ultra cold dusty plasmas (see figures 1(c) and (d)), we suggest the model of two point-like ion wake charges as illustrated in figure 5(b) ('water molecule-like'), which can generate the inverse V shape and attraction in transverse direction.…”

Section: Discussionmentioning

confidence: 99%

Ultracold ions wake in dusty plasmas

Sundar

Moldabekov

2020

New J. Phys.

View full text Add to dashboard Cite

Motivated by the recent experimental realization of ultracold dusty plasma (2019 Sci. Rep. 9 3261), we present the results of particle-in-cell simulation with Monte-Carlo-collisions for wake behind a dust particle due to focusing of ions at superfluid helium temperature (∼2 K). Dynamical screening (wakefield) defines structural and dynamical properties of charged dust particles in plasmas such as phase transition, crystal formation, vibration modes (waves) etc. Here, we delineate in detail the dependence of wake strength on the streaming velocity of ions and on the ion-neutral charge exchange collision frequency (neutrals density) in the ultracold dusty plasma. Lowering the temperature to ultracold level leads to a wake pattern behind a dust particle that completely differs from the wake at normal conditions. For wide range of parameters, most remarkable features of the wakefield are (i) the formation of wake pattern with two maxima split in transverse to ion flow direction in the downstream area, (ii) pronounced inverse V shape of the wakefield closely resembling the wake in quark-gluon plasma and dense quantum plasma (warm dense matter), and (iii) the inter-dust attraction region in transverse direction. The latter shows that molecule-like interaction between dust particles is realized in ultracold dusty plasmas. These observations show a fundamental difference of ultracold dusty plasma physics from well studied complex plasmas at normal conditions.

show abstract

Section: Discussionmentioning

confidence: 99%

Ultracold ions wake in dusty plasmas

Sundar

Moldabekov

2020

New J. Phys.

View full text Add to dashboard Cite

show abstract

“…In PK‐4, electrorheological experiments under microgravity were performed in two parabolic flight campaigns in 2008 and 2009 . Here, a polarity switching frequency of 1,000 Hz was applied to the dc electrodes for generating a longitudinal electric ac field inside of the glass tube.…”

Section: Electrorheologymentioning

confidence: 96%

Recent microgravity experiments with complex direct current plasmas

Dietz

Kretschmer

Steinmüller

et al. 2017

Contrib. Plasma Phys

View full text Add to dashboard Cite

Complex plasmas are low‐temperature plasmas containing micrometer‐sized particles. They are useful as models for strongly coupled many‐body systems. Since the microparticles are strongly affected by gravity, microgravity experiments with complex plasmas are conducted. Here we report on recent microgravity experiments with the experimental facility PK‐4 performed in parabolic flights. In particular, we discuss electrorheological and demixing experiments and the image analysis tools used.

show abstract

“…The FCO structure was never found under microgravity. The dust particles formed an assembly of linear chains elongating along the y-axis, i.e., the main tube [28,29]. The electric field, whose direction is alternatively switched at 1 kHz between the electrodes, makes an ion stream along its direction.…”

Section: Dusty Plasmas Under Microgravitymentioning

confidence: 99%

Microgravity Experiments Using Parabolic Flights for Dusty Plasmas

Takahashi¹

2020

Progress in Fine Particle Plasmas

View full text Add to dashboard Cite

The chapter is dedicated to descriptions of the microgravity experiments, which were done by using parabolic flights and for analyzing behaviors of dust particles in plasmas, i.e., dusty plasmas under microgravity. There are projects of the microgravity experiments of the dusty plasmas using the International Space Stations, where time for microgravity is long and has a scale of hours. Conversely, it is significant to find out phenomena of the dusty plasmas in the short time scale of a few 10 s including the transition from gravity to microgravity, which is performed by parabolic flights of aircrafts on the earth. Methodology and results of the experiments are shown here for further investigations of the dusty plasmas in future.

show abstract

Complex Plasmas in External Fields: The Role of Non-Hamiltonian Interactions

Cited by 54 publications

References 24 publications

Ultracold ions wake in dusty plasmas

Ultracold ions wake in dusty plasmas

Recent microgravity experiments with complex direct current plasmas

Microgravity Experiments Using Parabolic Flights for Dusty Plasmas

Contact Info

Product

Resources

About