Imperial College London
Alternate

DrNicholasDover

Faculty of Natural Sciences, Department of Physics

Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 3791nicholas.dover08 Website

 
 
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Location

 

735Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Pikuz:2018:10.1109/LO.2018.8435524,
author = {Pikuz, SA and Faenov, AY and Pikuz, TA and Skobelev, IY and Alkhimova, MA and Martynenko, AS and Sakaki, H and Nishiuchi, M and Pirozhkov, AS and Sagisaka, A and Dover, NP and Kondo, K and Ogura, K and Fukuda, Y and Kiriyama, H and Kando, M and Sentoku, Y and Hata, M and Zigler, A and Nishitani, K and Miyahara, T and Watanabe, Y and Kodama, R and Kondo, K},
doi = {10.1109/LO.2018.8435524},
title = {X-ray radiation properties of plasma under interaction of femtosecond laser pulses with ∼ 10<sup>22</sup> W/cm<sup>2</sup> intensities},
url = {http://dx.doi.org/10.1109/LO.2018.8435524},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - Study of radiation properties of solid dense plasma irradiated by ultraintense lasers has a great interest both from fundamental physics and different application point of views. Recently upgraded petawatt J-KAREN-P laser together with precise focusing technique delivers 35 fs laser pulses of 1022 W/cm2 intensity into a micron-size focal spot on target. For such unprecedented intensities the application of high-resolution X-ray spectroscopy allows to investigate the ionization mechanisms and to measure the parameters of relativistic plasma from front and rear sides of moderate (Al) and high Z (Ti, Fe,) thin foil targets. Kinetic modeling of the spectra is used to estimate electron plasma density and temperature, demonstrating Te ∼2 keV for Ne ∼5e22 cm-3 in the hottest emission region. Thus, it is experimentally demonstrated for the first time that the laser pulse of over 1e21 W/cm2 intensity is absorbed neither in the solid density plasma nor in a pre-plasma of a common critical density, but in the matter of so called relativistic critical density. It is revealed how even small displacement of the target out of the optimal laser focus, as well the decrease in temporal contrast of the laser pulse, strongly reduce both the intensity of X-ray radiation and degree of plasma ionization. 2D PIC code simulations of femtosecond laser interaction with various materials are provided and compared with experimental results.
AU  - Pikuz,SA
AU  - Faenov,AY
AU  - Pikuz,TA
AU  - Skobelev,IY
AU  - Alkhimova,MA
AU  - Martynenko,AS
AU  - Sakaki,H
AU  - Nishiuchi,M
AU  - Pirozhkov,AS
AU  - Sagisaka,A
AU  - Dover,NP
AU  - Kondo,K
AU  - Ogura,K
AU  - Fukuda,Y
AU  - Kiriyama,H
AU  - Kando,M
AU  - Sentoku,Y
AU  - Hata,M
AU  - Zigler,A
AU  - Nishitani,K
AU  - Miyahara,T
AU  - Watanabe,Y
AU  - Kodama,R
AU  - Kondo,K
DO  - 10.1109/LO.2018.8435524
PY  - 2018///
TI  - X-ray radiation properties of plasma under interaction of femtosecond laser pulses with ∼ 10<sup>22</sup> W/cm<sup>2</sup> intensities
UR  - http://dx.doi.org/10.1109/LO.2018.8435524
ER  -
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