Investigation Of Plasma Produced By High-Energy Low-Intensity Laser Pulses For Implantation Of Ge Ions Into Si And Sio2 Substrates

2006 ◽  
Author(s):  
M. Rosiński
Keyword(s):  
Laser Pulses ◽  
High Energy ◽  
Low Intensity ◽  
Intensity Laser

Direct implantation of Ge ions produced by high-energy low-intensity laser pulses into SiO2films prepared on Si substrates

2006 ◽  
Vol T123 ◽  
pp. 148-151 ◽  
Author(s):  
J M Rosiński ◽  
J Wołowski ◽  
J Badziak ◽  
F P Boody ◽  
S Gammino ◽  
...  
Keyword(s):  
Laser Pulses ◽  
High Energy ◽  
Si Substrates ◽  
Low Intensity ◽  
Intensity Laser

scholarly journals The use of low-intensity laser radiation in the treatment of occupational diseases of the peripheral nervous system

2019 ◽  
pp. 479-483
Author(s):  
N. Yu. Malkova ◽  
S. V. Grebenkov ◽  
O. A. Kochetova
Keyword(s):  
Nervous System ◽  
Laser Radiation ◽  
Laser Therapy ◽  
Peripheral Nervous System ◽  
Occupational Diseases ◽  
High Energy ◽  
Upper Limbs ◽  
Low Intensity ◽  
Low Intensity Laser Therapy ◽  
Intensity Laser

Introduction. Laser radiation, discovered in the mid-twentieth century, is actively used in modern medicine. Along with the effects of high-energy lasers, researchers are attracting more and more attention to the methods of low-intensity laser therapy in the treatment of various diseases of the peripheral nervous system. At the same time, there are very few works in which the effectiveness of low-intensity laser radiation action in occupational diseases of the nervous system would be assessed.The aim of study was searching for information on the modern understanding of the mechanisms of action of low-intensity laser radiation and on its use in the treatment of occupational diseases of the nervous system in Russian and foreign scientific literature.Materials and methods: The article presents an overview of available scientific Russian and foreign literary sources. Search and selection of sources was carried out using open databases PubMed and RSCI.Results. Low-intensity laser therapy has anti-inflammatory, analgesic, immunocorrective and reflexogenic effects. There are described cases of successful application of low-intensity laser radiation in the treatment of vibration disease, radicular and muscular tonic syndromes, carpal tunnel syndrome. At the same time, there are no works in which the influence of low-intensity laser radiation on the dynamics of professional polyneuropathy of the upper limbs would be assessed.Conclusions: The biological effect of low-intensity laser radiation is complex and many-sided. Low-intensity laser therapy has a wide spectrum of action on various pathogenesis pathways, it is a common method of treating diseases of the peripheral nervous system, including professional aetiology. The urgent task is to substantiate and develop a technique for using low-intensity laser radiation to treat patients with professional polyneuropathies of the upper limbs (as the most common occupational disease of the peripheral nervous system) and to evaluate its effectiveness during dynamic observation.

scholarly journals High energy Gallium Arsenide laser does not facilitate collagen alteration in muscle skeletal extracellular matrix: experimental study

2017 ◽  
Vol 30 (suppl 1) ◽  
pp. 297-305 ◽  
Author(s):  
Beatriz Barbosa de Souza ◽  
Érika Zanfolin Consoli ◽  
Ana Paula Coelho Figueira Freire ◽  
Geovana Leticia Fernandes de Oliveira ◽  
Francis Lopes Pacagnelli ◽  
...  
Keyword(s):  
Extracellular Matrix ◽  
Gallium Arsenide ◽  
Laser Therapy ◽  
Liquid Nitrogen ◽  
Hind Limb ◽  
Fibrous Tissue ◽  
High Energy ◽  
Low Intensity ◽  
Low Intensity Laser Therapy ◽  
Intensity Laser

Abstract Introduction: Low intensity laser therapy has proven effective in treating different tissues, reducing inflammation, preventing the formation of fibrous tissue, and promoting muscle regeneration. Objective: To evaluate the effect of low intensity laser therapy, seven days after the injury, and verify whether the radiated energy chosen influences the formation of fibrous tissue. Methods: Thirty Wistar rats, adult male, average body weight 210-340 g were used. The animals were randomized into three groups: control group, untreated injured group (L), and injured and treated group (LT). After anesthetizing the animals, muscle injury was induced by freezing (cryoinjury) in the central region of the tibialis anterior muscle belly (TA) on the left hind limb, through an iron rod previously immersed in liquid nitrogen. A Gallium Arsenide laser, wavelength 904 nm was used. The applications were initiated 24 hours after injury, daily, for five days, at two points in the lesion area. After 7 days, the animals were euthanized; the TA muscle of the left hind limb was removed and frozen in liquid nitrogen and the obtained histological sections were subjected to Sirius Red staining. Results: Histological analysis showed no significant difference in relation to the area of fibrosis in the LT and L groups. Conclusion: The results suggest that the energy density of 69 J/cm² and final energy (4.8 joules) did not promote alterations in the area of collagen in the skeletal muscle extracellular matrix.

Generation of very low energy-spread electron beams using low-intensity laser pulses in a low-density plasma

2011 ◽  
Vol 18 (3) ◽  
pp. 033109 ◽  
Author(s):  
Ajay K. Upadhyay ◽  
Sushil Arun Samant ◽  
Deepangkar Sarkar ◽  
Pallavi Jha ◽  
Srinivas Krishnagopal
Keyword(s):  
Electron Beams ◽  
Laser Pulses ◽  
Low Energy ◽  
Energy Spread ◽  
Low Density ◽  
Low Intensity ◽  
Low Density Plasma ◽  
Intensity Laser ◽  
Density Plasma

scholarly journals Effects induced by high and low intensity laser plasma on SiC Schottky detectors

2018 ◽  
Vol 167 ◽  
pp. 03005 ◽  
Author(s):  
Antonella Sciuto ◽  
Lorenzo Torrisi ◽  
Antonino Cannavò ◽  
Massimo Mazzillo ◽  
Lucia Calcagno
Keyword(s):  
Surface Defects ◽  
Simultaneous Detection ◽  
Reverse Current ◽  
Plasma Temperature ◽  
High Energy ◽  
Laser Exposure ◽  
Low Intensity ◽  
Front Electrode ◽  
Electrons And Ions ◽  
Intensity Laser

Silicon-Carbide detectors are extensively employed as diagnostic devices in laser-generated plasma, allowing the simultaneous detection of photons, electrons and ions, when used in time-of-flight configuration. The plasma generated by high intensity laser (1016 W/cm2) producing high energy ions was characterized by SiC detector with a continuous front-electrode, and a very thick active depth, while SiC detector with an Interdigit front-electrode was used to measure the low energy ions of plasma generated by low intensity laser (1010 W/cm2). Information about ion energy, number of charge states, plasma temperature can be accurately obtained. However, laser exposure induces the formation of surface and bulk defects whose concentration increases with increasing the time to plasma exposure. The surface defects consist of clusters with a main size of the order of some microns and they modify the diode barrier height and the efficiency of the detector as checked by alpha spectrometry. The bulk defects, due to the energy loss of detected ions, strongly affect the electrical properties of the device, inducing a relevant increase of the leakage (reverse) current and decrease the forward current related to a deactivation of the dopant in the active detector region.

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.

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