Conveners
(DPP) T3-9 Warm and Magnetised Plasmas | Plasmas chauds et magnétisés (DPP)
- Amina Hussein (University of Alberta)
The impact of ion dynamics in the sheath of argon DC plasma discharges is analysed. We show that, at moderate pressures where the ion mean free path is of the order of the sheath width (10-150 Pa), the spatial variations of the ion temperature have a strong impact the sheath formation process, especially on the density profiles of plasma species and the mean velocity of the ions impacting the...
Non-equilibrium plasmas at atmospheric pressure are often characterized by optical emission spectroscopy. Despite the simplicity of recording optical emission spectra in plasmas, the determination of spatially resolved plasma properties (e.g. electron temperature) in an efficient way is very challenging.
Hyperspectral imaging is a spectroscopic technique that combines optical emission...
A low-$\beta$ plasma is characterized by a dominance of magnetic energy over internal (kinetic) energy, where the magnetic pressure ($B^2/2\mu_0$) surpasses the kinetic pressure ($p$), confining the plasma within magnetic fields. Under specific conditions, low-$\beta$ plasmas adhere to Alfvén's theorem, wherein magnetic field lines remain 'frozen' within the plasma and move with it. These...
Ionospheric turbulence is studied extensively with satellites and rocket instrumentation and with ground-based radars. There are two distinct regimes. One concerns the E region below 130 km altitude and the other the F region above 150 km. The E region is often subjected to intense Hall currents, which lead to various instabilities dominated by a modified two-stream instability. F region...
