Details
| Original language | English |
|---|---|
| Article number | 7 |
| Journal | Microgravity Science and Technology |
| Volume | 37 |
| Issue number | 1 |
| Early online date | 23 Jan 2025 |
| Publication status | E-pub ahead of print - 23 Jan 2025 |
Abstract
In this work we present an experiment in which we injected microspheres at low pressure into a capacitively coupled argon plasma chamber. The setup was located in the top point of the Einstein-Elevator drop tower in Hannover, Germany, where the microparticles reached their equilibrium position above the lower electrode during 1g. During the fall, the trajectories of the microparticles, which were driven by the electric force, the neutral drag force and some residual gravitational force, were recorded. In addition, simulations of the plasma conditions were performed with commercial software to determine the microparticle charges via an orbital motion limit theory approach, taking into account the charge exchange in ion-neutral collisions. Based on the calculated position dependence of the microparticle charges and the electric force, the electric field present in the plasma sheath region was finally determined.
Keywords
- Drop tower, Dusty plasma, Electric field, Glow discharge, Plasma sheath
ASJC Scopus subject areas
- Mathematics(all)
- Modelling and Simulation
- Engineering(all)
- General Engineering
- Physics and Astronomy(all)
- General Physics and Astronomy
- Mathematics(all)
- Applied Mathematics
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In: Microgravity Science and Technology, Vol. 37, No. 1, 7, 23.01.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Determination of the Electric Field by Particle Tracking in a Plasma Sheath Region during Free Fall
AU - Schmitz, Andreas S.
AU - Hanstein, Luisa
AU - Klein, Max
AU - Kretschmer, Michael
AU - Lotz, Christoph
AU - Shemakhin, Aleksandr
AU - Thoma, Markus H.
N1 - Publisher Copyright: © The Author(s) 2025.
PY - 2025/1/23
Y1 - 2025/1/23
N2 - In this work we present an experiment in which we injected microspheres at low pressure into a capacitively coupled argon plasma chamber. The setup was located in the top point of the Einstein-Elevator drop tower in Hannover, Germany, where the microparticles reached their equilibrium position above the lower electrode during 1g. During the fall, the trajectories of the microparticles, which were driven by the electric force, the neutral drag force and some residual gravitational force, were recorded. In addition, simulations of the plasma conditions were performed with commercial software to determine the microparticle charges via an orbital motion limit theory approach, taking into account the charge exchange in ion-neutral collisions. Based on the calculated position dependence of the microparticle charges and the electric force, the electric field present in the plasma sheath region was finally determined.
AB - In this work we present an experiment in which we injected microspheres at low pressure into a capacitively coupled argon plasma chamber. The setup was located in the top point of the Einstein-Elevator drop tower in Hannover, Germany, where the microparticles reached their equilibrium position above the lower electrode during 1g. During the fall, the trajectories of the microparticles, which were driven by the electric force, the neutral drag force and some residual gravitational force, were recorded. In addition, simulations of the plasma conditions were performed with commercial software to determine the microparticle charges via an orbital motion limit theory approach, taking into account the charge exchange in ion-neutral collisions. Based on the calculated position dependence of the microparticle charges and the electric force, the electric field present in the plasma sheath region was finally determined.
KW - Drop tower
KW - Dusty plasma
KW - Electric field
KW - Glow discharge
KW - Plasma sheath
UR - http://www.scopus.com/inward/record.url?scp=85218252911&partnerID=8YFLogxK
U2 - 10.1007/s12217-025-10162-y
DO - 10.1007/s12217-025-10162-y
M3 - Article
AN - SCOPUS:85218252911
VL - 37
JO - Microgravity Science and Technology
JF - Microgravity Science and Technology
SN - 0938-0108
IS - 1
M1 - 7
ER -