Time Resolved TDLAS Investigation of Pre-ionization Effect in Dual HiPIMS Discharges

Argon metastables in HiPIMS: time-resolved tunable diode-laser diagnostics

Time resolved Tunable Diode-Laser Absorption Spectroscopy (TD-LAS) measurements were performed on the argon metastable (Ar) level 3s3p(P°3/2)4s excited at 801.478 nm, in the dense plasma region in front of the magnetron target in a high power impulse magnetron sputtering (HiPIMS) discharge. From the Doppler profile the evolution of the temperature and density were derived during the pulse as we...

Towards deeper understanding of an HiPIMS discharge by time-resolved optical plasma diagnostics

As a promising pulsed sputter deposition technique, High-Power Impulse Magnetron Sputtering (HiPIMS) required an extensive time-resolved plasma characterization. Being essentially non-intrusive, optical plasma diagnostics methods posses in particular the timeand spaceresolution(s) which normally exceed the typical needs of a typical HiPIMS geometry [1] and, therefore, can be readily applied for...

investigation of (meta)discourse markers in elt coursebooks

the present study aimed to investigate representation of discourse markers and metadiscourse markers in conversations and readings of general elt coursebook series used in the language centers of iran. to this aim, four elt coursebooks popularly taught in language centers of this country were analyzed based on fung and carter’s (2007) framework regarding discourse markers and hyland’s (2005) fr...

Realization of time-resolved two-vacuum-ultraviolet-photon ionization

Dissociative multiphoton ionization of NO2 studied by time-resolved imaging.

We have studied dissociative multiphoton ionization of NO2 by time-resolved velocity map imaging in a two-color pump-probe experiment using the 400 and 266 nm harmonics of a regeneratively amplified titanium-sapphire laser. We observe that most of the ion signal appears as NO+ with approximately 0.28 eV peak kinetic energy. Approximately 600 fs period oscillations indicative of wave packet moti...