@inproceedings{9e0e4b6a0d674f7399b50a75f3f7be84,
title = "High-intensity high-order harmonics generated from low-density plasma",
abstract = "We study the generation of high-order harmonics from lowly ionized plasma, using the 10 TW, 10 Hz laser of the Advanced Laser Light Source (ALLS). We perform detailed studies on the enhancement of a single order of the high-order harmonic spectrum generated in plasma using the fundamental and second harmonic of the ALLS beam line. We observe quasimonochromatic harmonics for various targets, including Mn, Cr, Sn, and In. We identify most of the ionic/neutral transitions responsible for the enhancement, which all have strong oscillator strengths. We demonstrate intensity enhancements of the 13th 17 th 29th and 33rd harmonics from these targets using the 800 nm pump laser and varying its chirp. We also characterized the attosecond nature of such plasma harmonics, measuring attosecond pulse trains with 360 as duration for chromium plasma, using the technique of {"}Reconstruction of Attosecond Beating by Interference of Two-photon Transitions{"} (RABBIT). These results show that plasma harmonics are intense source of ultrashort coherent soft x-rays.",
keywords = "Attosecond pulses, High-order harmonics",
author = "T. Ozaki and \{Elouga Bom\}, \{L. B.\} and J. Abdul-Hadf and Ganeev, \{R. A.\} and S. Haessler and P. Salieres",
year = "2009",
month = nov,
day = "25",
doi = "10.1063/1.3204533",
language = "English",
isbn = "9780735406902",
series = "AIP Conference Proceedings",
pages = "254--262",
booktitle = "Laser-Driven Relativistic Plasmas Applied to Science, Industry and Medicine - The 2nd International Symposium",
note = "2nd International Symposium on Laser-Driven Relativistic Plasmas Applied to Science, Industry and Medicine ; Conference date: 19-01-2009 Through 23-01-2009",
}