TY - JOUR
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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U2 - 10.1007/s00340-004-1446-1
DO - 10.1007/s00340-004-1446-1
M3 - Article
AN - SCOPUS:2642566154
VL - 78
SP - 923
EP - 926
JO - Applied Physics B: Lasers and Optics
JF - Applied Physics B: Lasers and Optics
SN - 0946-2171
IS - 7-8
ER -