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Some Fundamental Concepts of Femtosecond Laser Filamentation

S. L. Chin
Center for Optics, Photonics and Lasers & Department of Physics,
Engineering Physics and Optics, Laval University, Quebec City, Qc G1K 7P4, Canada

The fundamental physical concepts underlying filamentation are discussed. These include sliceby- slice self-focusing, intensity clamping, back ground reservoir and self-compression of the pulse during propagation.

absalman

دكتور / عبدالعاطي بدر سالمان جيولوجي استشاري، مصر [email protected]

PLASMA L FOR TORCH  POWER CONTROSCRAMJET APPLICATION

Mark A. Peretich
VSGC Undergraduate Research Scholar
Dr. Walter F. O’Brien, Dr. Joseph A. Schetz
Faculty Advisors
Virginia Polytechnic Institute and State University
Blacksburg, Virginia 24061, April, 2007

Abstract

Plasma torches have proven reliable methods of ignition and flame-holding for supersonic combustion applications. The Hy-V Scramjet Flight Experiment plans to use an 800W plasma torch for ignition of hydrogen fuel in a Mach 2 flow—a “first” in a free-flight scramjet experiment. Torch power will be controlled by a proportional feedback system monitoring feedstock pressure, fuel pressure, and a combustion-chamber infrared flame sensor.

Original designs are required for the hardware and control system of the plasma torch operating under these conditions. This paper will discuss the design and construction of a battery power source and controller to achieve and sustain supersonic combustion.

absalman

دكتور / عبدالعاطي بدر سالمان جيولوجي استشاري، مصر [email protected]

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دكتور: عبدالعاطي بدر سالمان

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