We report on the characterization of recently developed submillimetric He gas jets with peak density higher than 1021 atoms/cm3 from cylindrical and slightly conical nozzles of throat diameter of less than 400 μm. Helium gas at pressure 300−400 bar has been developed for this purpose to compensate the nozzle throat diameter reduction that affects the output mass flow rate. The fast-switching electro-valve enables to operate the jet safely for multi-stage vacuum pump assembly. Such gaseous thin targets are particularly suitable for laser-plasma interaction studies in the unexplored near-critical regime.

Topics
Vacuum apparatus, Continuous wavelet transform, Integral transforms, Interferometry, Optical properties, Gas jet, Laser plasma interactions, Fluid mechanics, Fluid flows, Supersonic flows
© 2012 American Institute of Physics.
2012
American Institute of Physics
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