Vacuum-cored hollow waveguide for high-energy high-intensity laser transmission and its application to biological tissue ablation

2000 ◽  
Author(s):  
Shunichi Sato ◽  
Tsunenori Arai ◽  
Yi-Wei Shi ◽  
Yuji Matsuura ◽  
Mitsunobu Miyagi ◽  
...  
Keyword(s):  
Biological Tissue ◽  
High Intensity ◽  
High Energy ◽  
Tissue Ablation ◽  
Hollow Waveguide ◽  
High Intensity Laser ◽  
Intensity Laser

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.

High intensity laser-driven x-ray sources for high energy density science

2015 ◽  
Author(s):  
F. Albert ◽  
B. B. Pollock ◽  
J. L. Shaw ◽  
N. Lemos ◽  
W. Schumaker ◽  
...  
Keyword(s):  
Energy Density ◽  
High Intensity ◽  
High Energy ◽  
High Energy Density ◽  
X Ray ◽  
High Intensity Laser ◽  
Intensity Laser

scholarly journals Measurement of the angle, temperature and flux of fast electrons emitted from intense laser–solid interactions

2015 ◽  
Vol 81 (5) ◽  
Author(s):  
D. R. Rusby ◽  
L. A. Wilson ◽  
R. J. Gray ◽  
R. J. Dance ◽  
N. M. H. Butler ◽  
...  
Keyword(s):  
High Intensity ◽  
Rear Surface ◽  
High Energy ◽  
Intense Laser ◽  
Rear Side ◽  
Measured Signal ◽  
X Rays ◽  
High Intensity Laser ◽  
Intensity Laser ◽  
Laser Solid Interactions

High-intensity laser–solid interactions generate relativistic electrons, as well as high-energy (multi-MeV) ions and x-rays. The directionality, spectra and total number of electrons that escape a target-foil is dependent on the absorption, transport and rear-side sheath conditions. Measuring the electrons escaping the target will aid in improving our understanding of these absorption processes and the rear-surface sheath fields that retard the escaping electrons and accelerate ions via the target normal sheath acceleration (TNSA) mechanism. A comprehensive Geant4 study was performed to help analyse measurements made with a wrap-around diagnostic that surrounds the target and uses differential filtering with a FUJI-film image plate detector. The contribution of secondary sources such as x-rays and protons to the measured signal have been taken into account to aid in the retrieval of the electron signal. Angular and spectral data from a high-intensity laser–solid interaction are presented and accompanied by simulations. The total number of emitted electrons has been measured as $2.6\times 10^{13}$ with an estimated total energy of $12\pm 1~\text{J}$ from a $100~{\rm\mu}\text{m}$ Cu target with 140 J of incident laser energy during a $4\times 10^{20}~\text{W}~\text{cm}^{-2}$ interaction.

Vacuum-cored hollow waveguide for transmission of high-energy, nanosecond Nd:YAG laser pulses and its application to biological tissue ablation

2000 ◽  
Vol 25 (1) ◽  
pp. 49 ◽  
Author(s):  
Shunichi Sato ◽  
Hiroshi Ashida ◽  
Tsunenori Arai ◽  
Yi-Wei Shi ◽  
Yuji Matsuura ◽  
...  
Keyword(s):  
Nd:Yag Laser ◽  
Biological Tissue ◽  
Laser Pulses ◽  
High Energy ◽  
Tissue Ablation ◽  
Hollow Waveguide

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.

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