Space-charge sheath with ions accelerated into the plasma

Modeling low pressure collisional plasma sheath with space-charge effect

The present work develops a computationally efficient one-dimensional subgrid embedded finite element formulation for plasma-sheath dynamics. The model incorporates space-charge effect throughout the whole plasma and the sheath region using multifluid equations. Secondary electron emission is not considered. A third-order temperature dependent polynomial is used to self-consistently calculate t...

Fast ignition with ponderomotively accelerated ions

Contrary to the central spark ignition concept, the fuel of the deuterium-tritium (DT) capsule in a fast ignition (FI) scheme will be compressed at lower implosion velocities to densities of several hundred g/cm, what reduces problems with high symmetry and hydrodynamic instabilities [1]. To ignite such a precompressed pellet, additional internal energy must be allocated in a local region of it...

Abdominal compartment syndrome due to spontaneous rectus sheath hematoma with extension into the retroperitoneal space

Rectus sheath hematoma (RSH) is an increasingly common clinical condition in our hospitals due to the increasing use of anticoagulant therapies for various purposes among our patients. Treatment of spontaneous RSH is generally conservative. For continued bleeding, interventional radiologic identification and subsequent embolization is an effective option. Surgery usually involves significant mo...

Extraction of ions from the matrix sheath in ablation-plasma ion implantation

A simple one-dimensional theory is presented to assess the implantation of ions from the ion matrix sheath ~IMS! in an ablated plasma plume that is approaching a negatively biased substrate. Under the assumption that the plume geometry, the electron and ion density distributions, and the potential distribution are frozen during the IMS extraction, the implanted ion current is calculated as a fu...

Stability of the Plasma-sheath