scholarly journals Signatures of the Carrier Envelope Phase in Nonlinear Thomson Scattering

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 528
Author(s):  
Marcel Ruijter ◽  
Vittoria Petrillo ◽  
Thomas C. Teter ◽  
Maksim Valialshchikov ◽  
Sergey Rykovanov
Keyword(s):  
Laser Pulse ◽  
Radiation Spectrum ◽  
Thomson Scattering ◽  
High Energy ◽  
Phase Changes ◽  
High Energy Radiation ◽  
Carrier Envelope Phase ◽  
High Intensity Laser ◽  
Experimental Parameters ◽  
Intensity Laser

High-energy radiation can be generated by colliding a relativistic electron bunch with a high-intensity laser pulse—a process known as Thomson scattering. In the nonlinear regime the emitted radiation contains harmonics. For a laser pulse whose length is comparable to its wavelength, the carrier envelope phase changes the behavior of the motion of the electron and therefore the radiation spectrum. Here we show theoretically and numerically the dependency of the spectrum on the intensity of the laser and the carrier envelope phase. Additionally, we also discuss what experimental parameters are required to measure the effects for a beamed pulse.

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.

Propagation of an ultrashort, high-intensity laser pulse in gas-target plasma

2012 ◽  
Vol 78 (4) ◽  
pp. 483-489 ◽  
Author(s):  
XIAOFANG WANG ◽  
GUANGHUI WANG ◽  
ZHANNAN MA ◽  
KEGONG DONG ◽  
BIN ZHU ◽  
...  
Keyword(s):  
Laser Pulse ◽  
High Intensity ◽  
Spot Size ◽  
High Energy ◽  
Beam Radius ◽  
Gas Target ◽  
Target Plasma ◽  
High Intensity Laser ◽  
Gas Targets ◽  
Intensity Laser

AbstractFor high-energy gain of electron acceleration by a laser wakefield, a stable or guiding propagation of an ultrashort, high-intensity laser pulse in a gas-target plasma is of fundamental importance. Preliminary experiments were carried out for the propagation of 30-fs, ~100-TW laser pulses of intensities ~1019W/cm2 in plasma of densities ~1019/cm3. Self-guiding length of nearly 1.4 mm was observed in a gas jet and 15 mm in a hydrogen-filled capillary. Fluid-dynamics simulations are used to characterize the two types of gas targets. Particle-in-cell simulations indicate that in the plasma, after the pulse's evolution of self-focusing and over-focusing, the high-intensity pulse could be stably guided with a beam radius close to the plasma wavelength. At lower plasma densities, a preformed plasma channel of a parabolic density profile matched to the laser spot size would be efficient for guiding the pulse.

scholarly journals Coulomb explosion of a cluster irradiated by a high intensity laser pulse

2000 ◽  
Vol 18 (3) ◽  
pp. 503-506 ◽  
Author(s):  
T. ESIRKEPOV ◽  
R. BINGHAM ◽  
S. BULANOV ◽  
T. HONDA ◽  
K. NISHIHARA ◽  
...  
Keyword(s):  
Laser Pulse ◽  
High Intensity ◽  
Laser Light ◽  
High Energy ◽  
Coulomb Explosion ◽  
New Class ◽  
High Intensity Laser ◽  
Ion Cloud ◽  
2D And 3D ◽  
Intensity Laser

Clusters represent a new class of laser pulse targets which show both the properties of underdense and of overdense plasmas. We present analytical and numerical results (based on 2D- and 3D-PIC simulations) of the Coulomb explosion of the ion cloud that is formed when a cluster is irradiated by a high-intensity laser pulse. For laser pulse intensities in the range of 1021−1022 W/cm2, the laser light can rip electrons from atoms almost instantaneously and can create a cloud made of an electrically nonneutral plasma. Ions can then be accelerated up to high energy during the Coulomb explosion of the cloud.

scholarly journals Targets with cone-shaped microstructures from various materials for enhanced high-intensity laser–matter interaction

2021 ◽  
Vol 9 ◽  
Author(s):  
Tina Ebert ◽  
René Heber ◽  
Torsten Abel ◽  
Johannes Bieker ◽  
Gabriel Schaumann ◽  
...  
Keyword(s):  
Laser Pulse ◽  
High Intensity ◽  
Ultrashort Laser Pulse ◽  
Process Chain ◽  
Pulse Processing ◽  
High Intensity Laser ◽  
Matter Interaction ◽  
Different Characteristics ◽  
Ultrashort Laser ◽  
Intensity Laser

Abstract Targets with microstructured front surfaces have shown great potential in improving high-intensity laser–matter interaction. We present cone-shaped microstructures made out of silicon and titanium created by ultrashort laser pulse processing with different characteristics. In addition, we illustrate a process chain based on moulding to recreate the laser-processed samples out of polydimethylsiloxane, polystyrol and copper. With all described methods, samples of large sizes can be manufactured, therefore allowing time-efficient, cost-reduced and reliable ways to fabricate large quantities of identical targets.

High-contrast, high-intensity laser pulse generation using a nonlinear preamplifier in a Ti:sapphire laser system

2008 ◽  
Vol 33 (7) ◽  
pp. 645 ◽  
Author(s):  
Hiromitsu Kiriyama ◽  
Michiaki Mori ◽  
Yoshiki Nakai ◽  
Takuya Shimomura ◽  
Manabu Tanoue ◽  
...  
Keyword(s):  
Laser Pulse ◽  
High Intensity ◽  
Laser System ◽  
Pulse Generation ◽  
High Contrast ◽  
Ti:Sapphire Laser ◽  
High Intensity Laser ◽  
Intensity Laser

Effects of electron recirculation on a hard x-ray source observed during the interaction of a high intensity laser pulse with thin Au targets

2013 ◽  
Vol 20 (12) ◽  
pp. 123111 ◽  
Author(s):  
A. Compant La Fontaine ◽  
C. Courtois ◽  
E. Lefebvre ◽  
J. L. Bourgade ◽  
O. Landoas ◽  
...  
Keyword(s):  
Laser Pulse ◽  
High Intensity ◽  
X Ray ◽  
High Intensity Laser ◽  
Intensity Laser

Interaction of a high-intensity laser pulse with a surface: plasma generation, self-action, and instabilities

2000 ◽  
Author(s):  
Victor A. Aleshkevich ◽  
Yaroslav V. Kartashov ◽  
P. A. Polyakov ◽  
Victor A. Vysloukh ◽  
A. S. Zhukarev
Keyword(s):  
Laser Pulse ◽  
High Intensity ◽  
Surface Plasma ◽  
Plasma Generation ◽  
High Intensity Laser ◽  
Intensity Laser
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