Stop motion microphotography of laser driven plates

Conference · Thu Sep 01 04:00:00 EDT 1994

DOI:https://doi.org/10.1117/12.189027· OSTI ID:10182334

Frank, A M ^[1]; Trott, W M ^[2]

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1. Lawrence Livermore National Lab., CA (United States)
2. Sandia National Labs., Albuquerque, NM (United States)

Laser driven plates have been used for several years for high velocity shock wave and impact studies. Recent questions about the integrity and ablation rates of these plates coupled with an improved capability for microscopic stop motion photography led to this study. For these experiments, the plates were aluminum, coated on the ends of optical fibers. A high power laser pulse in the fiber ionizes the aluminum at the fiber/coating interface. The plasma thus created accelerates the remaining aluminum to high velocities, several kilometers per second. We defined {open_quotes}thick{close_quotes} or {open_quotes}thin{close_quotes} coatings as those where a flying plate (flyer) was launched vs. the material being completely ionized. Here we were specifically interested in the thick/thin boundary to develop data for the numerical models attempting to predict flyer behavior.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000; W-7405-ENG-48
• OSTI ID: 10182334
• Report Number(s): SAND--94-2159C; CONF-940723--26; UCRL-JC-118218; ON: DE94018740
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420200
ACCELERATION
FACILITIES, EQUIPMENT, AND TECHNIQUES
FOILS
LASERS
PLASMA
PLATES
SHOCK WAVES
STREAK CAMERAS
STREAK PHOTOGRAPHY