Share Email Print

Proceedings Paper

Position Diagnostics For A Magnetic-Pinch Imploding Cylinder X-Ray Generator
Author(s): J. D. Seagrave; C. W. Woods; L. A. Jones
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Two diagnostic systems have been developed to assess the position and shape of a cylindrical imploding plasma sheath x-ray source. Both systems employ batteries of inexpensive nitrogen lasers. For measurement of the cylinder radius, eight 75J, 1.2 -ns (FWHM) nitrogen lasers will form a series of narrow beams displaced parallel to the cylinder diameter. As the plasma implodes over a 2s period, these position-sampling lasers are fired in sequence at times expected to result in partial shadowing. The 2-cm wide beams strike a position-sensitive detector made up of a helical fiber-optic delay line of 2-mm pitch and 4-ns delay/turn. The clad plastic fiber is doped with Rhodamine B at the points where the 337.1-nm laser beams strike, and the fluorescent red flashes propagate along the optical delay line in both directions to avalanche photodiodes. One signal is displayed on a 5-MHz vertical raster; the other is displayed on four turns of a 2-MHz spiral sweep. The envelopes of both pulse trains are displayed on a conventional dual-beam scope. The nitrogen lasers are aligned axially and displaced radially by a system of mirrors. To assess the symmetry of the implosion, another battery of four nitrogen lasers is used to provide paraxially displaced multiple-image pinhole schlieren pictures.

Paper Details

Date Published: 30 December 1981
PDF: 5 pages
Proc. SPIE 0288, Los Alamos Conf on Optics '81, (30 December 1981); doi: 10.1117/12.932090
Show Author Affiliations
J. D. Seagrave, University of California (United States)
C. W. Woods, University of California (United States)
L. A. Jones, University of California (United States)

Published in SPIE Proceedings Vol. 0288:
Los Alamos Conf on Optics '81
Donald H. Liebenberg, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?