X-ray conversion of ultra-short laser pulses on a solid sample: Role of electron waves excited in the pre-plasma

2014 ◽  
Vol 21 (7) ◽  
pp. 072108 ◽  
Author(s):  
F. Baffigi ◽  
G. Cristoforetti ◽  
L. Fulgentini ◽  
A. Giulietti ◽  
P. Koester ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Solid Sample ◽  
X Ray ◽  
Short Laser Pulses

scholarly journals Experimental study of X-ray emission from laser-irradiated planar targets on “Mishen” Facility

1992 ◽  
Vol 10 (4) ◽  
pp. 753-758 ◽  
Author(s):  
V. A. Bolotin ◽  
I. N. Burdonskii ◽  
V. V. Gavrilov ◽  
A. Yu. Gol'tsov ◽  
S. V. Zavyalets ◽  
...  
Keyword(s):  
Experimental Study ◽  
Energy Transfer ◽  
Conversion Efficiency ◽  
Spectral Resolution ◽  
Line Emission ◽  
Laser Pulses ◽  
Temporal Analysis ◽  
Ablation Rate ◽  
X Ray

X-ray emission from planar targets irradiated by 1.054-μm laser pulses was observed with temporal, spatial, and spectral resolution. The main purpose of these measurements was the investigation of energy transfer in multilayer targets and X-ray conversion efficiency. A mass ablation rate was determined from temporal analysis of multicharged ion line emission and a key role of corona X-ray emission in accelerated material preheating was established.

scholarly journals Experimental and numerical study of ultra-short laser-produced collimated Cu Kα X-ray source

2017 ◽  
Vol 35 (3) ◽  
pp. 442-449 ◽  
Author(s):  
R. Rathore ◽  
V. Arora ◽  
H. Singhal ◽  
T. Mandal ◽  
J.A. Chakera ◽  
...  
Keyword(s):  
Laser Intensity ◽  
Numerical Study ◽  
Low Cost ◽  
Laser Pulses ◽  
Photon Flux ◽  
X Rays ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Short Laser Pulses

AbstractKα X-ray sources generated from the interaction of ultra-short laser pulses with solids are compact and low-cost source of ultra-short quasi-monochromatic X-rays compared with synchrotron radiation source. Development of collimated ultra-short Kα X-ray source by the interaction of 45 fs Ti:sapphire laser pulse with Cu wire target is presented in this paper. A study of the Kα source with laser parameters such as energy and pulse duration was carried out. The observed Kα X-ray photon flux was ~2.7 × 108 photons/shot at the laser intensity of ~2.8 × 1017 W cm−2. A model was developed to analyze the observed results. The Kα radiation was coupled to a polycapillary collimator to generate a collimated low divergence (0.8 mrad) X-ray beam. Such sources are useful for time-resolved X-ray diffraction and imaging studies.

scholarly journals Simulation of a high-brightness, hard X-ray source based on high-intensity interaction of ultra-short laser pulses with high-Z targets

1997 ◽  
Vol 15 (1) ◽  
pp. 139-143
Author(s):  
V.A. Lykov ◽  
V.E. Chernyakov ◽  
Ya.Z. Kandiev ◽  
I.A. Litvinenko ◽  
V.G. Nikolaev
Keyword(s):  
Angular Distribution ◽  
Numerical Simulations ◽  
Electromagnetic Fields ◽  
High Intensity ◽  
Laser Pulses ◽  
The State ◽  
High Brightness ◽  
Fast Electrons ◽  
X Ray ◽  
Short Laser Pulses

The results of numerical simulations of fast electrons interaction with matter, calculated yield and angular distribution of bremsstrahlung and fluorescence K-α X-ray radiation and generation of electromagnetic fields, carried out by ERA, PM2D, and PRIZMA codes for the state of experiments on interaction of ultra-short laser pulses with high-Z targets at intensity of 1016−1018 W/cm2 are presented. Spherical targets with conical hollows and conical targets of high-Z matter are proposed for experiments with picosecond lasers to increase the brightness of hard X-ray sources.

scholarly journals X-ray gain at 18·2 nm (CVI Balmer α) in laser-produced recombining carbon plasmas

1988 ◽  
Vol 6 (3) ◽  
pp. 621-624 ◽  
Author(s):  
W. Brunner ◽  
R. John ◽  
Th. Schlegel
Keyword(s):  
Plasma Heating ◽  
Laser Pulses ◽  
X Ray ◽  
Short Laser Pulses ◽  
Experimental Findings ◽  
Theoretical Results

Plasma heating by short laser pulses is investigated theoretically. Gain coefficients of 3… 4 cm−1 at the Balmer α transition in carbon could be obtained. The theoretical results agree with the corresponding experimental findings.

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

2007 ◽  
Vol 25 (2) ◽  
pp. 267-275 ◽  
Author(s):  
A.YA. Faenov ◽  
A.I. Magunov ◽  
T.A. Pikuz ◽  
I. YU. Skobelev ◽  
S.V. Gasilov ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Laser Intensity ◽  
Laser Pulses ◽  
Intense Laser ◽  
Low Contrast ◽  
X Ray ◽  
Fast Ions ◽  
Self Focusing ◽  
Short Laser Pulses ◽  
Charged Ions

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 ∼ 1 MeV at rather low values of laser intensity IL ≈ 6 × 1016 W cm−2.

High Kα x-ray conversion efficiency from extended source gas jet targets irradiated by ultra short laser pulses

2008 ◽  
Vol 92 (24) ◽  
pp. 241504 ◽  
Author(s):  
N. L. Kugland ◽  
C. G. Constantin ◽  
P. Neumayer ◽  
H.-K. Chung ◽  
A. Collette ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Laser Pulses ◽  
Gas Jet ◽  
Extended Source ◽  
X Ray ◽  
Short Laser Pulses

Enhanced water window x-ray emission from in situ formed carbon clusters irradiated by intense ultra-short laser pulses

2013 ◽  
Vol 103 (5) ◽  
pp. 054107 ◽  
Author(s):  
U. Chakravarty ◽  
B. S. Rao ◽  
V. Arora ◽  
A. Upadhyay ◽  
H. Singhal ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Carbon Clusters ◽  
X Ray ◽  
Water Window ◽  
Short Laser Pulses

A Laser Triggered Self-Sustaining Metals-Compound Semiconductor Transition for AlSb

1981 ◽  
Vol 4 ◽  
Author(s):  
R. Andrew ◽  
L. Baufay ◽  
A. Pigeolet ◽  
L.D. Laude
Keyword(s):  
Laser Pulse ◽  
Laser Annealing ◽  
Pulsed Laser ◽  
Laser Pulses ◽  
Pulsed Laser Annealing ◽  
Short Laser Pulses ◽  
Thermally Triggered ◽  
Heat Of Transformation ◽  
Complete Transformation

ABSTRACTThe preparation of AlSb thin films by pulsed laser annealing of Al/Sb sandwiches is studied in order to resolve some past controversy about the temperature rise induced by the laser pulse. Using 1000 Ȧ thick two layer films supported by TEM grids, we investigate the energy threshold for complete transformation as a function of pulse duration from 15 nsec to 100 msec, and of ambient temperature from −100°C to 250°C.We thence calculate the temperature effect directly induced by the laser to be about 930°C, or approximately the melting point of the metals, whereas inert gas furnace anneals of comparable films show transformation at this temperature occuring only in about 100 sec. We discuss the isoenergetic nature of the system for short laser pulses and the role of the heat of transformation, and thus conclude that the reaction is thermally triggered by the laser pulse but is to some extent self-sustaining via the heat of transformation locally distributed. This model is also shown to have equal validity for the systems CdTe, CdSe and AlAs.

scholarly journals Role of the laser wavelength in the X-ray production for clusters under intense laser pulses

2014 ◽  
Vol 488 (13) ◽  
pp. 132021
Author(s):  
C Prigent ◽  
M Comte ◽  
O Gobert ◽  
D Guillaumet ◽  
J Habib ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Laser Wavelength ◽  
Intense Laser ◽  
X Ray ◽  
Intense Laser Pulses
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