X-ray spectroscopy observation of fast ions generation in plasma produced by short low-contrast laser pulse irradiation of solid targets

被引：56
作者：
Faenov, A. Ya.
Magunov, A. I.
Pikuz, T. A.
Skobelev, I. Yu
Gasilov, S. V.
Stagira, S.
Calegari, F.
Nisoli, M.
De Silvestri, S.
Poletto, L.
Villoresi, P.
Andreev, A. A.
机构：
[1] Russian Acad Sci, Joint Inst High Temp, Moscow 127412, Russia
[2] Russian Acad Sci, AM Prokhorov Gen Phys Inst, Moscow, Russia
[3] INFM, CNR, Dept Phys, Natl Lab Ultrafast & Ultraintense Opt Sci, Milan, Italy
[4] Univ Padua, INFM, CEI, CNRS,Lab Ultraviolet & Xray Opt Res, Padua, Italy
[5] SI Vavilov State Opt Inst, Inst Laser Phys, St Petersburg, Russia
来源：
LASER AND PARTICLE BEAMS | 2007年 / 25卷 / 02期
关键词：
ion acceleration; laser beam self-focusing; laser-produced plasma; X-ray spectroscopy; HOT-ELECTRONS; PROTON ACCELERATION; INTENSITY; DURATION; DRIVEN;
D O I：
10.1017/S0263034607000110
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
X-ray spectra of plasma produced by the interaction of Ti:Sa laser pulses (duration from 60 fs to 1 ps, and energy from 15 mJ to 128 mJ) with foil and solid Teflon and AL targets are investigated. It is shown experimentally and theoretically that the use of low contrast (10(-2) - 10(-4)) short laser pulses, essentially promotes the conditions for generation of fast multi-charged ions. This effect is caused by self-focusing of the main laser pulse in a preplasma produced by intense laser prepulses. Modeling of the observed spectral line shape gives evidence of a considerable (about 3%) amount of multi-charged He-like F ions with energy E similar to 1 MeV at rather low values of laser intensity I-L approximate to 6 x 10(16) W cm(-2).
引用
收藏
页码：267 / 275
页数：9
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