Study on laser plasma generation by high-speed photography

Koji Takahashi; Tatsuya Ikuta; Kunihito Nagayama

Study on laser plasma generation by high-speed photography

Koji Takahashi, Tatsuya Ikuta, Kunihito Nagayama

Thermophysics and Fluid Mechanics

Research output: Contribution to conference › Paper › peer-review

Abstract

Laser-induced breakdown of atmosphere is explored by newly developed shadowgraphy and steak photography. Our laser shadowgraphy clearly visualizes transient structure of shock wave, which helps us to understand the multiple breakdowns depending on laser intensity and focal length. The pear shape due to inverse bremsstrahlung becomes more distinguished as the laser intensity increases and focal length decreases. This reason becomes clear by using the streak photographs of Ins/mm resolution. Time charts are obtained for each discrete plasma generation in the laser pulse of a few nanoseconds duration. Effect of solid wall near the focal point is also examined and explained.

Original language	English
Publication status	Published - Dec 1 2001
Event	32nd AIAA Plasmadynamics and Lasers Conference 2001 - Anaheim, CA, United States Duration: Jun 11 2001 → Jun 14 2001

Other

Other	32nd AIAA Plasmadynamics and Lasers Conference 2001
Country/Territory	United States
City	Anaheim, CA
Period	6/11/01 → 6/14/01

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering
Condensed Matter Physics

Cite this

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title = "Study on laser plasma generation by high-speed photography",

abstract = "Laser-induced breakdown of atmosphere is explored by newly developed shadowgraphy and steak photography. Our laser shadowgraphy clearly visualizes transient structure of shock wave, which helps us to understand the multiple breakdowns depending on laser intensity and focal length. The pear shape due to inverse bremsstrahlung becomes more distinguished as the laser intensity increases and focal length decreases. This reason becomes clear by using the streak photographs of Ins/mm resolution. Time charts are obtained for each discrete plasma generation in the laser pulse of a few nanoseconds duration. Effect of solid wall near the focal point is also examined and explained.",

author = "Koji Takahashi and Tatsuya Ikuta and Kunihito Nagayama",

year = "2001",

month = dec,

day = "1",

language = "English",

note = "32nd AIAA Plasmadynamics and Lasers Conference 2001 ; Conference date: 11-06-2001 Through 14-06-2001",

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TY - CONF

T1 - Study on laser plasma generation by high-speed photography

AU - Takahashi, Koji

AU - Ikuta, Tatsuya

AU - Nagayama, Kunihito

PY - 2001/12/1

Y1 - 2001/12/1

N2 - Laser-induced breakdown of atmosphere is explored by newly developed shadowgraphy and steak photography. Our laser shadowgraphy clearly visualizes transient structure of shock wave, which helps us to understand the multiple breakdowns depending on laser intensity and focal length. The pear shape due to inverse bremsstrahlung becomes more distinguished as the laser intensity increases and focal length decreases. This reason becomes clear by using the streak photographs of Ins/mm resolution. Time charts are obtained for each discrete plasma generation in the laser pulse of a few nanoseconds duration. Effect of solid wall near the focal point is also examined and explained.

AB - Laser-induced breakdown of atmosphere is explored by newly developed shadowgraphy and steak photography. Our laser shadowgraphy clearly visualizes transient structure of shock wave, which helps us to understand the multiple breakdowns depending on laser intensity and focal length. The pear shape due to inverse bremsstrahlung becomes more distinguished as the laser intensity increases and focal length decreases. This reason becomes clear by using the streak photographs of Ins/mm resolution. Time charts are obtained for each discrete plasma generation in the laser pulse of a few nanoseconds duration. Effect of solid wall near the focal point is also examined and explained.

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M3 - Paper

T2 - 32nd AIAA Plasmadynamics and Lasers Conference 2001

Y2 - 11 June 2001 through 14 June 2001

ER -

Study on laser plasma generation by high-speed photography

Abstract

Other

All Science Journal Classification (ASJC) codes

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