Expansion dynamics of laser produced plasma

Expansion dynamics of laser produced plasma

We consider the applicability of the isentropic, adiabatic gas dynamical model of plume expansion for laser ablation in vacuum. We show that the model can be applied to ionized plumes and estimate the upper electron temperature limit on the applicability of the isentropic approximation. The model predictions are compared with Langmuir ion probe measurements and deposition profiles obtained for ...

Dynamics of ZnO laser produced plasma in high pressure argon

Laser-produced plasma-wall interaction

Jets of laser–generated plasma represent a flexible and well-defined model environment for investigation of plasma interactions with solid surfaces (walls). The pilot experiments carried out on the iodine laser system (5–200 J, 0.44 mm, 0.25–0.3 ns, ,1 10 W/cm) at the PALS Research Centre in Prague are reported. Modification of macroscopic characteristics of the Al plasma jets produced at laser...

Structure of an exploding laser-produced plasma.

We describe the first-ever volumetric, time-resolved measurements performed with a moving probe within an expanding dense plasma, embedded in a background magnetized plasma. High-resolution probe measurements of the magnetic field and floating potential in multiple 2D cut planes combined with a 1 Hz laser system reveal complex three-dimensional current systems within the expanding plasma. Stati...

Numerical Analysis of Laser Produced Plasma Expansion with Large Ion Larmor Radius via 3D PIC Simulation

Expansion phenomena of laser produced cluster plasma in an external strong magnetic field have been studied. In the cluster plasma expansion process, the ion Larmor radius is often much larger than the initial cluster size, while the electron Larmor radius is smaller than the cluster size, namely, Re < R0 � Ri, where Re(i) is Larmor radius of electron (ion) and R0 is the initial cluster size. W...