TITLE

Design and characterization of supersonic nozzles for wide focus laser-plasma interactions

AUTHOR(S)
Lemos, N.; Lopes, N.; Dias, J. M.; Viola, F.
PUB. DATE
October 2009
SOURCE
Review of Scientific Instruments;Oct2009, Vol. 80 Issue 10, p103301
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In this work we optimize the contour of supersonic nozzles to produce long and stable gas jets suitable to be used in loose focus laser-plasma applications. The nozzle design method takes into account the inclusion of a boundary layer that increases the length of the usable gas jet. Two 8 mm supersonic nozzles were characterized, one with a Mach number of 3 and another with a Mach number of 6, using a Mach–Zehnder interferometer performed with a He:Ne 4 cm expanded laser beam. The experimental results confirm that the inclusion of the boundary layer produces an 8 mm constant longitudinal density profile for the nozzle with a Mach number of 6 (NM6) and a 4.5 mm constant longitudinal density profile for the nozzle with a Mach number of 3 (NM3).
ACCESSION #
44909781

 

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