Freezing and melting of 3D complex plasma structures under microgravity conditions driven by neutral gas pressure manipulation
S. A. Khrapak, B. A. Klumov, P. Huber, V. I. Molotkov, A. M. Lipaev,, V. N. Naumkin, H. M. Thomas, A. V. Ivlev, G. E. Morfill, O. F. Petrov, V. E., Fortov, Yu. Malentschenko, and S. Volkov
TL;DR
This study explores how neutral gas pressure controls phase transitions in 3D complex plasmas under microgravity, revealing the mechanisms behind freezing and melting processes.
Contribution
It demonstrates the use of neutral gas pressure as a control parameter for phase changes in 3D complex plasmas in microgravity conditions.
Findings
Pressure decrease induces freezing of plasma structures.
Pressure increase causes melting of plasma structures.
Structural properties evolve predictably with pressure changes.
Abstract
Freezing and melting of large three-dimensional complex plasmas under microgravity conditions is investigated. The neutral gas pressure is used as a control parameter to trigger the phase changes: Complex plasma freezes (melts) by decreasing (increasing) the pressure. Evolution of complex plasma structural properties upon pressure variation is studied. Theoretical estimates allow us to identify main factors responsible for the observed behavior.
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