Propagation of a randomized 600-ps laser beam in a helium gas jet over long scale lengths

2001 ◽  
Vol 64 (2) ◽  
Author(s):  
J. Faure ◽  
V. Malka ◽  
F. Amiranoff
Keyword(s):  
Laser Beam ◽  
Gas Jet ◽  
Helium Gas

scholarly journals Dynamics of UV short pulse laser-induced plasmas from a ceramic material “titanium carbide”: a hydrodynamical out of equilibrium investigation

2019 ◽  
Vol 37 (01) ◽  
pp. 86-100
Author(s):  
A. Ait Oumeziane ◽  
J-D. Parisse
Keyword(s):  
Laser Beam ◽  
Ceramic Material ◽  
Material Properties ◽  
Atmospheric Pressure ◽  
Short Pulse ◽  
Plume Expansion ◽  
Pure Material ◽  
Short Pulse Laser ◽  
Helium Gas ◽  
Ionization Rates

AbstractThe present work is motivated by the numerous applications of short lasers–ceramics interaction. It aims at applying a newly developed model to investigate the dynamic of laser-induced plasmas from a ceramic material into a helium gas under atmospheric pressure. To have a better understanding of the link between the material properties, the plume characteristics and its interaction with the laser beam, a thorough examination of the entire ablation processes is conducted. Comparison with the behavior of laser-induced plumes under the same conditions from a pure material is shown to have a key role in shedding the light on what monitors the plume expansion in the background environment. Plume temperatures, velocities, ionization rates as well as elemental composition have been presented and compared under carefully chosen relevant conditions. This study is of interest for laser matter applications depending on the induced plasmas dynamics and composition.

Helium gas jet spectral calibration of acoustic emission transducers and systems

1976 ◽  
Vol 54 (17) ◽  
pp. 1824-1830 ◽  
Author(s):  
S. L. McBride ◽  
T. S. Hutchison
Keyword(s):  
Acoustic Emission ◽  
Structural Response ◽  
Gas Jet ◽  
Spectral Information ◽  
Mechanical Contact ◽  
Calibration Source ◽  
Response Mapping ◽  
Spectral Calibration ◽  
Helium Gas ◽  
Produce System

The excitation and spectral calibration of acoustic emission systems using a helium gas jet is shown to produce system independent acoustic emission spectral information. The calibration source makes no mechanical contact with the specimen or structure under investigation and can be conveniently used for specimen or structural response mapping.

The use of the helium gas jet in the analysis of acoustic emissions

1978 ◽  
Vol 11 (4) ◽  
pp. 175-178 ◽  
Author(s):  
G.A. Green ◽  
P. Dingwall
Keyword(s):  
Acoustic Emissions ◽  
Gas Jet ◽  
Helium Gas

Extra ion feature of Thomson scattered light in the interaction of a 600 ps laser with helium gas jet

2003 ◽  
Vol 10 (2) ◽  
pp. 495-501 ◽  
Author(s):  
V. Malka ◽  
E. De Wispelaere ◽  
Ph. Mounaix ◽  
S. Hüller ◽  
F. Amiranoff ◽  
...  
Keyword(s):  
Scattered Light ◽  
Gas Jet ◽  
Helium Gas

Side-jets formation in a rectangular helium gas jet.

2016 ◽  
Vol 2016 (0) ◽  
pp. 0209
Author(s):  
Takafumi SUGAWA ◽  
Akinori MURAMATSU
Keyword(s):  
Gas Jet ◽  
Helium Gas
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