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Studies of Laser-Driven Flyer Acceleration Using Optical Fiber Coupling [Book Chapter]

Conference · · Shock Compression of Condensed Matter–1991
 [1]
  1. Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
+ Show Author Affiliations
An optically recording velocity interferometer system has been used to measure acceleration histories and maximum velocities for laser-driven aluminum foil targets launched from the output face of optical fibers. Peak flyer velocities have been determined as a function of various parameters, including driving laser fluence, laser pulse duration and target thickness. The results at high fluences are consistent with a nearly constant efficiency of coupling optical energy into flyer kinetic energy and a small ablated mass fraction; however, the coupling efficiency falls off rapidly at fluences < 15 J-cm-2. Measurement of the time delay between laser pulse arrival at the target and the onset of flyer motion have also been performed. Significant delays are observed at low fluences, arising from the increased time required for plasma formation at the fiber/foil interface under these conditions.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC04-76DP00789
OSTI ID:
5634918
Report Number(s):
SAND--91-0148C; CONF-9107105--19; ON: DE91013503; ISBN: 978-0-444-89732-9
Conference Information:
Journal Name: Shock Compression of Condensed Matter–1991
Country of Publication:
United States
Language:
English

References (4)

Digital extraction of interference fringe contours journal June 1985
High‐power Nd:glass laser transmission through optical fibers and its use in acceleration of thin foil targets journal April 1990
Optically recording interferometer for velocity measurements with subnanosecond resolution journal April 1983
Digital image processing of velocity‐interferometer data obtained from laser‐driven shock experiments journal October 1986

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Related Subjects

440600 -- Optical Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
656003* -- Condensed Matter Physics-- Interactions between Beams &amp; Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACCELERATION
ALUMINIUM
ELEMENTS
EQUIPMENT
EQUIPMENT INTERFACES
FIBERS
FOILS
INTERFEROMETERS
LASER TARGETS
LASERS
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
NEODYMIUM LASERS
OPTICAL EQUIPMENT
OPTICAL FIBERS
PULSE TECHNIQUES
SOLID STATE LASERS
TARGETS