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Research Objective ARL Facilities and Capabilities ... · laser-driven flyer plates. New Trends in...
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APPROVED FOR PUBLIC RELEASE; DISTRIBUTION IS UNLIMITED Title S&T Campaign: Sciences for Lethality and Protection Kinetic Lethality Propulsion and Launch Steven Dean (410) 278-6357 [email protected] Frank DeLucia (410) 306-0884 [email protected] Jennifer Gottfried (410) 278-7573 [email protected] Research Objective • Develop a low-cost, high-throughput experiment to determine the shock response of lab scale quantities of novel materials • Utilize this technique to characterize potential materials at early stages of development, realizing significant cost savings Challenges • Obtaining a “top-hat” beam profile from a “near- Gaussian” Nd:YAG laser • Diffractive beam-shaping optics • Diffusive beam-shaping optics • Development of high-sensitivity/high-speed diagnostics to characterize shock induced chemistry ARL Facilities and Capabilities Available to Support Collaborative Research • Building 1101A: • ~3800 sq. ft. of lab space • Laser-induced air shock from energetic materials (LASEM) • Electrostatic discharge (ESD) • Approval to store and handle energetic materials • Multiple high-energy (1J+) Nd:YAG lasers • Extensive high-speed video capabilities • Streak camera and other spectrometers • VISAR Complementary Expertise / Facilities / Capabilities Sought in Collaboration • Novel materials with unknown shock-related properties • Laser-beam-shaping expertise Bibliography: • Dean SW, De Lucia FC, Gottfried JL. Indirect ignition of energetic materials with laser-driven flyer plates. Applied Optics. 2017 Jan 20;56(3):B134-41. • Dean SW, De Lucia FC, Gottfried JL. Characterization of laser-driven flyer plates. New Trends in Research of Energetic Materials. 2016. ScLP-029 Laser-Driven Flyer Plates Laser beam profiles and high-speed video of launch process Dimple Formation Foil Cracking Flyer Separation Launch Products Raw Beam With Beam Shaping Optic Diameter: 1.8 mm Laser-driven flyer plate launch system Flyer Plate Expanding Plasma Focused Laser Pulse Target VISAR 1 2 3 4 W P B P B FPA D F M S PM M 0.00 0.15 0.30 0.45 0.60 0.75 0 100 200 300 Velocity (km/s) Time (ns) 25 μm Cu 8 J/cm 2 16 J/cm 2 24 J/cm 2 31 J/cm 2 0 5 10 15 20 25 Light Intensity (a.u.) Time (μs) 1300 m/s 525 m/s 650 m/s 350 m/s * CL-20 Impact VISAR velocity traces, photodiode traces of CL-20 impact, schlieren imaging experimental setup
Transcript of Research Objective ARL Facilities and Capabilities ... · laser-driven flyer plates. New Trends in...
APPROVED FOR PUBLIC RELEASE; DISTRIBUTION IS UNLIMITED
TitleS&T Campaign: Sciences for Lethality and Protection
Kinetic LethalityPropulsion and Launch
Steven Dean (410) 278-6357 [email protected] Frank DeLucia (410) 306-0884 [email protected] Gottfried (410) 278-7573 [email protected]
Research Objective• Develop a low-cost, high-throughput experiment to
determine the shock response of lab scale quantities of novel materials
• Utilize this technique to characterize potential materials at early stages of development, realizing significant cost savings
Challenges• Obtaining a “top-hat” beam profile from a “near-
Gaussian” Nd:YAG laser • Diffractive beam-shaping optics• Diffusive beam-shaping optics
• Development of high-sensitivity/high-speed diagnostics to characterize shock induced chemistry
ARL Facilities and Capabilities Available to Support Collaborative Research• Building 1101A:
• ~3800 sq. ft. of lab space• Laser-induced air shock from energetic
materials (LASEM)• Electrostatic discharge (ESD) • Approval to store and handle energetic
materials• Multiple high-energy (1J+) Nd:YAG lasers• Extensive high-speed video capabilities• Streak camera and other spectrometers• VISAR
Complementary Expertise / Facilities / Capabilities Sought in Collaboration• Novel materials with unknown shock-related
properties• Laser-beam-shaping expertise
Bibliography:• Dean SW, De Lucia FC, Gottfried JL. Indirect ignition of
energetic materials with laser-driven flyer plates. Applied Optics. 2017 Jan 20;56(3):B134-41.
• Dean SW, De Lucia FC, Gottfried JL. Characterization of laser-driven flyer plates. New Trends in Research of Energetic Materials. 2016.
ScLP-029
Laser-Driven Flyer Plates
Laser beam profiles and high-speed video of launch process
Dimple Formation
FoilCracking
FlyerSeparation
Launch Products
Raw Beam With Beam Shaping OpticDiameter: 1.8 mm
Laser-driven flyer plate launch system
Flyer Plate
Expanding Plasma
FocusedLaser Pulse
Target
VISAR
1 2 3 4
WP
B
P
B
FPA
D FM
S
PMM
0.00
0.15
0.30
0.45
0.60
0.75
0 100 200 300
Velo
city
(km
/s)
Time (ns)
25 μm Cu
8 J/cm2
16 J/cm2
24 J/cm2
31 J/cm2
0 5 10 15 20 25
Ligh
t Int
ensi
ty (a
.u.)
Time (μs)
1300 m/s
525 m/s
650 m/s
350 m/s
*
CL-20 Impact
VISAR velocity traces, photodiode traces of CL-20 impact, schlieren imaging experimental setup
