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

Rev. Sci. Instrum. 80, 103301 (2009); doi:10.1063/1.3233895

Published 5 October 2009

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N. Lemos,1 N. Lopes,1 J. M. Dias,1 and F. Viola1,2
1GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
2Department of Neurology, Biomagnetic Center, University Hospital Jena, Erlanger Allee 101, D-07747 Jena, Germany
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). ©2009 American Institute of Physics
History: Received 4 June 2009; accepted 27 August 2009; published 5 October 2009
Permalink: http://link.aip.org/link/?RSINAK/80/103301/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.30.-q
    Plasma dynamics and flow
  • 52.40.Hf
    Plasma-material interactions; boundary layer effects
  • 52.75.-d
    Plasma devices
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0034-6748 (print)   1089-7623 (online)
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