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Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

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Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses

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Laser field absorption in self-generated electron-positron pair plasma.

E N Nerush¹, I Yu Kostyukov, A M Fedotov

¹Institute of Applied Physics, Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia.

Physical Review Letters

|March 17, 2011

Summary

High-power lasers face intensity limits due to energy absorption by electron-positron pair plasma. This absorption becomes significant at intensities around 10^24 W/cm^2, impacting future laser development.

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Area of Science:

Plasma Physics
High-Intensity Laser Interactions
Particle Physics

Background:

High-power laser intensity is limited by energy absorption mechanisms.
Electron-positron pair plasma can be generated by strong laser fields.
Electromagnetic cascades play a role in this energy absorption process.

Purpose of the Study:

To investigate the limitations on attainable high-power laser intensity.
To study the dynamics of electron-positron pair plasma generated by strong laser fields.
To demonstrate laser energy absorption in self-generated overdense pair plasma.

Main Methods:

Development of a numerical model for self-consistent electron-positron pair plasma dynamics.
Simulation of strong laser field interactions with a seed to produce pair plasma.
Analysis of energy absorption within the generated plasma.

Main Results:

Strong absorption of laser energy was demonstrated.
The absorption occurs in self-generated overdense electron-positron pair plasma.
Significant absorption is observed at laser intensities of approximately 10^24 W/cm^2.

Conclusions:

The developed numerical model accurately captures pair plasma dynamics and energy absorption.
Electron-positron pair plasma formation significantly limits achievable laser intensities.
These findings are relevant for laser intensities expected in the near future.