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Flyer acceleration experiments using a KrF laser system with a long pulse duration and pressure and thickness of isobaric zone induced in impacted materials

Published online by Cambridge University Press:  14 May 2002

T. KADONO ,
M. YOSHIDA ,
N.K. MITANI ,
T. MATSUMURA ,
E. TAKAHASHI ,
I. MATSUSHIMA ,
Y. OWADANO ,
Y. SASATANI ,
K. FUJITA  and
N. OZAKI
...Show all authors
T. KADONO
Affiliation:
National Institute of Materials and Chemical Research, 1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
M. YOSHIDA
Affiliation:
National Institute of Materials and Chemical Research, 1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
N.K. MITANI
Affiliation:
National Institute of Materials and Chemical Research, 1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
T. MATSUMURA
Affiliation:
National Institute of Materials and Chemical Research, 1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
E. TAKAHASHI
Affiliation:
Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba, Ibaraki 305-8568, Japan
I. MATSUSHIMA
Affiliation:
Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba, Ibaraki 305-8568, Japan
Y. OWADANO
Affiliation:
Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba, Ibaraki 305-8568, Japan
Y. SASATANI
Affiliation:
Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan Faculty of Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
K. FUJITA
Affiliation:
Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan Faculty of Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
N. OZAKI
Affiliation:
Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan Faculty of Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
K. TAKAMATSU
Affiliation:
Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan Faculty of Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
M. NAKANO
Affiliation:
Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan Faculty of Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
K.A. TANAKA
Affiliation:
Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan Faculty of Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
H. TAKENAKA
Affiliation:
NTT Advanced Technology Corporation, 3-9-11 Midori, Musashino, Tokyo 180-8585, Japan
H. ITO
Affiliation:
NTT Advanced Technology Corporation, 3-9-11 Midori, Musashino, Tokyo 180-8585, Japan
K. KONDO
Affiliation:
Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama, Kanagawa 226-8503, Japan
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Abstract

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Flyer acceleration experiments are carried out using a KrF laser system with a pulse duration of 10–15 ns and an intensity of ∼1.0 × 1013 W/cm2. Three-layered targets (aluminum–polyimide–tantalum) are used. First, an average velocity of laser-driven tantalum flyers with a thickness of 4 and 8 μm is estimated. Then, in a collision of a flyer with a copper layer attached to a diamond plate, we measure a transit time of a shock wave in the diamond. The impact velocity is estimated based on the transit time and a numerical simulation. This numerical simulation also shows that the initial peak pressure caused by the impact of a 4-μm-thick flyer is kept at 11 Mbar for 12–13 μm in thickness. Finally, whether this thickness is enough for EOS measurements is discussed.

Keywords

Flyer accelerationKrF laserLong pulse durationPressure and thickness of isobaric zone
Type
Research Article
Information
Laser and Particle Beams , Volume 19 , Issue 4 , October 2001 , pp. 623 - 630
Copyright
© 2001 Cambridge University Press