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.
Development and characterization of very dense submillimetric gas jets for laser-plasma interaction
F. Sylla, M. Veltcheva, S. Kahaly, A. Flacco, V. Malka; Development and characterization of very dense submillimetric gas jets for laser-plasma interaction. Rev. Sci. Instrum. 1 March 2012; 83 (3): 033507. https://doi.org/10.1063/1.3697859
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