scholarly journals Observation of strongly collimated proton beam from Tantalum targets irradiated with circular polarized laser pulses

2006 ◽  
Vol 24 (1) ◽  
pp. 117-123 ◽  
Author(s):  
MASATAKA KADO ◽  
HIROYUKI DAIDO ◽  
ATSUSHI FUKUMI ◽  
ZHONG LI ◽  
SATOSHI ORIMO ◽  
...  
Keyword(s):  
Proton Beam ◽  
Laser Pulses ◽  
High Energy ◽  
Track Detector ◽  
Beam Line ◽  
Quarter Wave Plate ◽  
Circularly Polarized ◽  
High Intensity Laser ◽  
Quarter Wave ◽  
Intensity Laser

High-energy protons are generated by focusing an ultrashort pulsed high intensity laser at the Advanced Photon Research Center, JAERI-Kansai onto thin (thickness <10 μm) Tantalum targets. The laser intensities are about 4 × 1018 W/cm2. The prepulse level of the laser pulse is measured with combination of a PIN photo diode and a cross correlator and is less than 10−6. A quarter-wave plate is installed into the laser beam line to create circularly polarized pulses. Collimated high energy protons are observed with CH coated Tantalum targets irradiated with the circularly polarized laser pulses. The beam divergence of the generated proton beam is measured with a CR-39 track detector and is about 6 mrad.

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 Longitudinal Component Properties of Circularly Polarized Terahertz Vortex Beams

2021 ◽  
Vol 9 ◽  
Author(s):  
Miao Wang ◽  
Xinke Wang ◽  
Peng Han ◽  
Wenfeng Sun ◽  
Shengfei Feng ◽  
...  
Keyword(s):  
Spot Size ◽  
Longitudinal Component ◽  
Transverse Component ◽  
Quarter Wave Plate ◽  
Phase Plate ◽  
Vortex Beam ◽  
Circularly Polarized ◽  
Left Hand ◽  
Quarter Wave ◽  
Focusing Properties

A circularly polarized vortex beam possesses similar focusing properties as a radially polarized beam. This type of beam is highly valuable for developing optical manufacturing technology, microscopy, and particle manipulation. In this work, a left-hand circularly polarized terahertz (THz) vortex beam (CPTVB) is generated by utilizing a THz quarter wave plate and a spiral phase plate. Focusing properties of its longitudinal component Ez are detailedly discussed on the simulation and experiment. With reducing the F-number of the THz beam and comparing with a transverse component Ex of a general circularly polarized THz beam, the simulation results show that the focal spot size and intensity of its Ez component can reach 87 and 50% of Ex under a same focusing condition. In addition, the experimental results still demonstrate that the left-hand CPTVB can always maintain fine Ez focusing properties in a broad bandwidth, which manifest the feasibility of this class of THz beams.

Development of a plasma waveguide for high-intensity laser pulses

1995 ◽  
Vol 51 (3) ◽  
pp. 2368-2389 ◽  
Author(s):  
C. G. Durfee ◽  
J. Lynch ◽  
H. M. Milchberg
Keyword(s):  
High Intensity ◽  
Laser Pulses ◽  
Plasma Waveguide ◽  
High Intensity Laser ◽  
Intensity Laser

scholarly journals Transport in dense matter of relativistic electrons produced in ultra-high-intensity laser interactions

2002 ◽  
Vol 20 (2) ◽  
pp. 321-336 ◽  
Author(s):  
DIMITRI BATANI
Keyword(s):  
High Intensity ◽  
Short Pulse ◽  
Dense Matter ◽  
Laser Pulses ◽  
Relativistic Electrons ◽  
Fast Electrons ◽  
Solid Density ◽  
High Intensity Laser ◽  
Intensity Laser ◽  
Laser Interactions

The paper reviews and analyses the experiments devoted to the propagation in dense matter of fast electrons produced in the interaction of short-pulse ultra-high-intensity laser pulses with solid density targets.

Source-size measurements and charge distributions of ions accelerated from thin foils irradiated by high-intensity laser pulses

2004 ◽  
Vol 79 (8) ◽  
pp. 1041-1045 ◽  
Author(s):  
J. Schreiber ◽  
M. Kaluza ◽  
F. Grüner ◽  
U. Schramm ◽  
B.M. Hegelich ◽  
...  
Keyword(s):  
High Intensity ◽  
Laser Pulses ◽  
Source Size ◽  
Charge Distributions ◽  
Thin Foils ◽  
High Intensity Laser ◽  
Intensity Laser
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