scholarly journals Theory and simulation of laser pulse trapping and amplifying in the interaction with a thin foil and a solid target

2012 ◽  
Vol 61 (4) ◽  
pp. 045202
Author(s):  
Zou De-Bin ◽  
Zhuo Hong-Bin ◽  
Shao Fu-Qiu ◽  
Yin Yan ◽  
Ma Yan-Yun ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Thin Foil ◽  
Solid Target

scholarly journals Optically Switchable MeV Ion/Electron Accelerator

2021 ◽  
Vol 11 (12) ◽  
pp. 5424
Author(s):  
Itamar Cohen ◽  
Yonatan Gershuni ◽  
Michal Elkind ◽  
Guy Azouz ◽  
Assaf Levanon ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Electron Accelerator ◽  
Energy Charge ◽  
Thin Foil ◽  
Main Pulse ◽  
Experimental Characterization ◽  
Particle Beams ◽  
Laser Accelerators

The versatility of laser accelerators in generating particle beams of various types is often promoted as a key applicative advantage. These multiple types of particles, however, are generated on vastly different irradiation setups, so that switching from one type to another involves substantial mechanical changes. In this letter, we report on a laser-based accelerator that generates beams of either multi-MeV electrons or ions from the same thin-foil irradiation setup. Switching from generation of ions to electrons is achieved by introducing an auxiliary laser pulse, which pre-explodes the foil tens of ns before irradiation by the main pulse. We present an experimental characterization of the emitted beams in terms of energy, charge, divergence, and repeatability, and conclude with several examples of prospective applications for industry and research.

Neutron emission from a deuterated solid target irradiated by an ultraintense laser pulse

2001 ◽  
Vol 8 (3) ◽  
pp. 1011-1021 ◽  
Author(s):  
C. Toupin ◽  
E. Lefebvre ◽  
G. Bonnaud
Keyword(s):  
Laser Pulse ◽  
Neutron Emission ◽  
Solid Target

scholarly journals Linear and nonlinear absolute phase effects in interactions of ulrashort laser pulses with a metal nano-layer or with a thin plasma layer

2007 ◽  
Vol 25 (3) ◽  
pp. 379-390 ◽  
Author(s):  
S. Varró
Keyword(s):  
Laser Pulse ◽  
Phase Difference ◽  
Plasma Layer ◽  
Thin Foil ◽  
Laser Pulses ◽  
Thomson Scattering ◽  
Carrier Envelope Phase ◽  
Absolute Phase ◽  
High Intensity Laser ◽  
Order Of Magnitude

It has been shown that in the scattered radiation, generated by an ultrashort laser pulse impinging on a metal nano-layer, non-oscillatory wakefields appears with a definite sign. The magnitude of these wakefields is proportional to the incoming field strength, and the definite sign of them is governed by the cosine of the carrier-envelope phase difference of the incoming pulse. When we let such a Wakefield excite the electrons of a secondary target (say an electron beam, a metal surface or a gas jet), we can obtain 100 percent modulation in the electron signal in a given direction. This scheme can serve as a basis for the construction of a robust linear carrier-envelope phase difference meter. At relativistic laser intensities, the target is considered as a plasma layer in vacuum produced from a thin foil by a prepulse, which is followed by the main high-intensity laser pulse. The nonlinearities stemming from the relativistic kinematics lead to the appearance of higher-order harmonics in the scattered spectra. In general, the harmonic peaks are downshifted due to the presence of an intensity-dependent factor. This phenomenon is analogous to the famous intensity-dependent frequency shift in the nonlinear Thomson scattering on a single electron. In our analysis, an attention has also been paid to the role of the carrier-envelope phase difference of the incoming few-cycle laser pulse. It is also shown that the spectrum has a long tail where the heights of the peaks vary practically within one order of magnitude forming a quasi-continuum. Fourier synthesizing the components from this plateau region attosecond pulses has obtained.

scholarly journals Effects of front surface plasma expansion on proton acceleration in ultraintense laser irradiation of foil targets

2008 ◽  
Vol 26 (4) ◽  
pp. 591-596 ◽  
Author(s):  
P. McKenna ◽  
D.C. Carroll ◽  
O. Lundh ◽  
F. Nürnberg ◽  
K. Markey ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Laser Irradiation ◽  
Proton Energy ◽  
Front Surface ◽  
Picosecond Laser ◽  
Thin Foil ◽  
Energy Conversion Efficiency ◽  
High Energy ◽  
Maximum Energy ◽  
Incident Laser Pulse

AbstractThe properties of beams of high energy protons accelerated during ultraintense, picosecond laser-irradiation of thin foil targets are investigated as a function of preplasma expansion at the target front surface. Significant enhancement in the maximum proton energy and laser-to-proton energy conversion efficiency is observed at optimum preplasma density gradients, due to self-focusing of the incident laser pulse. For very long preplasma expansion, the propagating laser pulse is observed to filament, resulting in highly uniform proton beams, but with reduced flux and maximum energy.

Scattered light diagnostic of over-dense plasma cavity at ultraintense laser pulse interaction with solid target

2001 ◽  
Author(s):  
Aleksandr A. Andreev ◽  
Alexei G. Zhidkov ◽  
Akira Sasaki ◽  
Konstantin Y. Platonov
Keyword(s):  
Laser Pulse ◽  
Dense Plasma ◽  
Scattered Light ◽  
Solid Target ◽  
Laser Pulse Interaction ◽  
Pulse Interaction

scholarly journals Non-linear interaction of ultra-intense ultra-short laser pulse with a relativistic flying double-sided dense plasma slab/mirror

2014 ◽  
Vol 32 (2) ◽  
pp. 253-260 ◽  
Author(s):  
Vineeta Jain ◽  
K.P. Maheshwari ◽  
N.K. Jaiman ◽  
Harish Malav
Keyword(s):  
Laser Pulse ◽  
Electric Fields ◽  
Dense Plasma ◽  
Thin Foil ◽  
Density Parameter ◽  
Ion Dynamics ◽  
Reflection And Transmission ◽  
Linear Interaction ◽  
Incident Laser Pulse ◽  
Plasma Slab

AbstractAnalytical and numerical investigation of the reflection and transmission of a counter-propagating relativistically strong laser pulse from a relativistically flying dense plasma double-sided mirror is studied. We assume that the incident laser pulse is short, so that we can neglect the slow ion dynamics and consider the electron motion only. Numerical results of the amplitudes of the reflected/transmitted electric fields from a uniformly moving mirror, accelerated mirror, and oscillating mirror are obtained. Fourier spectrum of the reflected intensity from the moving mirror shows that the intensity decreases with increase in the frequency. The reflected pulse has an up-shifted frequency and increased intensity. It is seen that the first few cycles of the reflected radiation exhibit presence of high harmonics, while the later cycles are compressed together with harmonics in comparison with the earlier cycles. The variation of the reflection coefficient for a uniformly moving mirror as a function of the thin foil plasma-density parameter is numerically studied.

scholarly journals Tc-99m production with ultrashort intense laser pulses

2014 ◽  
Vol 32 (4) ◽  
pp. 605-611 ◽  
Author(s):  
V. Yu. Bychenkov ◽  
A. V. Brantov ◽  
G. Mourou
Keyword(s):  
Laser Pulse ◽  
Thin Foil ◽  
Laser Pulses ◽  
High Energy ◽  
Intense Laser ◽  
Pic Simulation ◽  
Intense Laser Pulses ◽  
Fs Laser ◽  
Proton Generation ◽  
Coherent Amplification

AbstractThe interaction of a relativistic short laser pulse with thin foil is studied using 3D PIC simulations in the context of optimized high-energy proton generation for nuclear medicine and pharmacy. As an example, we analyze the Tc-99m yield from the Mo-100(p,2n)Tc-99m reaction with the International Coherent Amplification Network (ICAN) concept defined by a 10 J pulse energy and 10 kHz repetition rate. Based on 3D PIC simulation it has been demonstrated that normally incident 100 fs laser pulse with maximum intensity of 5 × 1021 W/cm2 is able to generate 1011 protons with energy upto 45 MeV from thin semi-transparent CH2 target. Such laser-produced proton beam after 6 hours bombardment of the thick metallic Mo-100 target gives around 300 Gbq activities of Tc-99m isotope. This gives reason to believe that laser technology for producing technetium is possible with ICAN concept to replace the traditional scheme through the fission of weapons-grade uranium.

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