Controlling coherent and incoherent plasma emissions: The role of electron plasma waves

A. S. Sandhu; S. Narayanan; G. R. Kumar

doi:10.1007/s00340-004-1446-1

Controlling coherent and incoherent plasma emissions: The role of electron plasma waves

A. S. Sandhu, S. Narayanan, G. R. Kumar

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

We present results of our two-pulse time resolved measurements of second harmonic and hard X-ray generation in the interaction of an intense (10 ¹⁶ W cm^-2, 100 fs, 800 nm) laser with a preplasma generated on a solid surface. The time-resolved study as a function of both plasma scale length and laser polarization brings out interesting features of electron plasma wave dynamics. The harmonic and X-ray emission show contrary behavior and we interpret the results in terms of Resonance Absorption and Wave-Breaking mechanisms. Simple optimization of the scale length of the preplasma and the polarization parameters of the main pulse results in significant enhancements, up to a factor of 100 for X-rays and 10 for the second harmonic respectively. These results can help us understand the governing mechanisms for higher harmonic generation and for fast particle generation, aiding the development of more efficient sources.

Original language	English (US)
Pages (from-to)	923-926
Number of pages	4
Journal	Applied Physics B: Lasers and Optics
Volume	78
Issue number	7-8
DOIs	https://doi.org/10.1007/s00340-004-1446-1
State	Published - 2004
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)
General Physics and Astronomy

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10.1007/s00340-004-1446-1

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abstract = "We present results of our two-pulse time resolved measurements of second harmonic and hard X-ray generation in the interaction of an intense (10 16 W cm-2, 100 fs, 800 nm) laser with a preplasma generated on a solid surface. The time-resolved study as a function of both plasma scale length and laser polarization brings out interesting features of electron plasma wave dynamics. The harmonic and X-ray emission show contrary behavior and we interpret the results in terms of Resonance Absorption and Wave-Breaking mechanisms. Simple optimization of the scale length of the preplasma and the polarization parameters of the main pulse results in significant enhancements, up to a factor of 100 for X-rays and 10 for the second harmonic respectively. These results can help us understand the governing mechanisms for higher harmonic generation and for fast particle generation, aiding the development of more efficient sources.",

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T1 - Controlling coherent and incoherent plasma emissions

T2 - The role of electron plasma waves

AU - Sandhu, A. S.

AU - Narayanan, S.

AU - Kumar, G. R.

PY - 2004

Y1 - 2004

N2 - We present results of our two-pulse time resolved measurements of second harmonic and hard X-ray generation in the interaction of an intense (10 16 W cm-2, 100 fs, 800 nm) laser with a preplasma generated on a solid surface. The time-resolved study as a function of both plasma scale length and laser polarization brings out interesting features of electron plasma wave dynamics. The harmonic and X-ray emission show contrary behavior and we interpret the results in terms of Resonance Absorption and Wave-Breaking mechanisms. Simple optimization of the scale length of the preplasma and the polarization parameters of the main pulse results in significant enhancements, up to a factor of 100 for X-rays and 10 for the second harmonic respectively. These results can help us understand the governing mechanisms for higher harmonic generation and for fast particle generation, aiding the development of more efficient sources.

AB - We present results of our two-pulse time resolved measurements of second harmonic and hard X-ray generation in the interaction of an intense (10 16 W cm-2, 100 fs, 800 nm) laser with a preplasma generated on a solid surface. The time-resolved study as a function of both plasma scale length and laser polarization brings out interesting features of electron plasma wave dynamics. The harmonic and X-ray emission show contrary behavior and we interpret the results in terms of Resonance Absorption and Wave-Breaking mechanisms. Simple optimization of the scale length of the preplasma and the polarization parameters of the main pulse results in significant enhancements, up to a factor of 100 for X-rays and 10 for the second harmonic respectively. These results can help us understand the governing mechanisms for higher harmonic generation and for fast particle generation, aiding the development of more efficient sources.

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Controlling coherent and incoherent plasma emissions: The role of electron plasma waves

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