title: Development and characterization of very dense submillimetric gas jets for laser-plasma interaction.
abstract: We report on the characterization of recently developed submillimetric He gas jets with peak density higher than 10(21) atoms/cm(3) 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.
authors.affiliation: Laboratoire d'Optique Appliquée, ENSTA-ParisTech, CNRS, Ecole Polytechnique, UMR 7639, 91761 Palaiseau, France. francois.sylla@ensta-paristech.fr
authors.forename: F
authors.initials: F
authors.lastname: Sylla
authors.forename: M
authors.initials: M
authors.lastname: Veltcheva
authors.forename: S
authors.initials: S
authors.lastname: Kahaly
authors.forename: A
authors.initials: A
authors.lastname: Flacco
authors.forename: V
authors.initials: V
authors.lastname: Malka