Generation of a plasma waveguide in an elongated, high repetition rate gas jet

We demonstrate a pulsed gas nozzle which can produce uniform, greater than 1-cm-long gas jets with peak equivalent pressures up to several hundred Torr at a distance up to ∼3 mm from the nozzle exit. Time-resolved electron density profiles are presented for 1.2-cm-long uniform plasma waveguides produced in an axicon line focus in this jet at a repetition rate of 10 Hz.