Refinement of time‐resolved x‐ray measurement system for studying the lattice deformation of silicon under pulsed Nd:YAG laser irradiation

1992 ◽  
Vol 63 (1) ◽  
pp. 1164-1167 ◽  
Author(s):  
S. Kojima ◽  
I. Maekawa ◽  
S. Kawado ◽  
T. Takahashi ◽  
T. Ishikawa ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Measurement System ◽  
Nd:Yag Laser ◽  
Lattice Deformation ◽  
Time Resolved ◽  
Pulsed Nd:Yag Laser ◽  
X Ray

scholarly journals Strategies forin situlaser heating in the diamond anvil cell at an X-ray diffraction beamline

2013 ◽  
Vol 21 (1) ◽  
pp. 89-96 ◽  
Author(s):  
Sylvain Petitgirard ◽  
Ashkan Salamat ◽  
Pierre Beck ◽  
Gunnar Weck ◽  
Pierre Bouvier
Keyword(s):  
High Pressure ◽  
Nd:Yag Laser ◽  
Laser Heating ◽  
Diamond Anvil Cell ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
Pulsed Nd:Yag Laser ◽  
X Ray ◽  
Diamond Anvil

An overview of several innovations regardingin situlaser-heating techniques in the diamond anvil cell at the high-pressure beamline ID27 of the European Synchrotron Radiation Facility is presented. Pyrometry measurements have been adapted to allow simultaneous double-sided temperature measurements with the installation of two additional online laser systems: a CO2and a pulsed Nd:YAG laser system. This reiteration of laser-heating advancements at ID27 is designed to pave the way for a new generation of state-of-the-art experiments that demand the need for synchrotron diffraction techniques. Experimental examples are provided for each major development. The capabilities of the double pyrometer have been tested with the Nd:YAG continuous-wave lasers but also in a time-resolved configuration using the nanosecond-pulsed Nd:YAG laser on a Fe sample up to 180 GPa and 2900 K. The combination of time-resolved X-ray diffraction within situCO2laser heating is shown with the crystallization of a high-pressure phase of the naturally found pyrite mineral MnS2(11 GPa, 1100–1650 K).

Preventive Effect of Tooth Fracture by Pulsed Nd:YAG Laser Irradiation with Diamine Silver Fluoride Solution

2001 ◽  
Vol 19 (6) ◽  
pp. 315-318 ◽  
Author(s):  
Keiko Yokoyama ◽  
Yuichi Kimura ◽  
Koukichi Matsumoto ◽  
Akihiro Fujishima ◽  
Takashi Miyazaki
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Preventive Effect ◽  
Fluoride Solution ◽  
Pulsed Nd:Yag Laser ◽  
Tooth Fracture ◽  
Silver Fluoride

Effect of Pre-Oxidized CuO Layer in Joining between Polyethylene Terephalate (PET) and Copper (Cu) by Using Pulsed Nd:YAG Laser

2010 ◽  
Vol 129-131 ◽  
pp. 714-718 ◽  
Author(s):  
Farazila Yusof ◽  
Yoshiharu Mutoh ◽  
Yukio Miyashita
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Shear Failure ◽  
High Heat ◽  
Experimental Result ◽  
Joint Interface ◽  
Intimate Contact ◽  
Cross Sectional ◽  
Pulsed Nd:Yag Laser ◽  
Oxide Particles

In the present study, effect of pre-oxidized (PO) CuO layer in the joining between polyethylene terephalate (PET) and copper (Cu) by using pulsed Nd:YAG laser was investigated. The experimental result for PET/PO Cu (with pre-oxidized layer) and PET/Cu (without pre-oxidized layer) were presented in this paper. The results showed the pre-oxidation surface improved the welding efficiency. The welded area and tensile shear failure load (TSFL) of PET/PO Cu joint were increased when pre-oxidized layer was introduced. This indicates that high heat was absorbed during laser irradiation of PET/PO-Cu joint compare to PET/Cu joint. On the other hand, the fracture surface of PET/PO-Cu showed the presence of Cu and Cu oxide particles in the PET side. While in case of PET/Cu, no occurrence of Cu particles can be observed. The presence of Cu oxide particles and Cu particles were believed may increase PET/PO Cu joint shear force. From the cross-sectional observation of PET/PO Cu joint interface, it was found that an oxide layer in the laser irradiation area was removed and PET seemed to have intimate contact with Cu surface.

Impact of Pulsed Nd:YAG Laser Irradiation on the Growth and Mortality of the Biofilm Forming Marine Bacterium Pseudoalteromonas carrageenovora

Biofouling ◽  
2002 ◽  
Vol 18 (2) ◽  
pp. 123-127 ◽  
Author(s):  
Kanavillil Nandakumar ◽  
Hideki Obika ◽  
Tatsuya Shinozaki ◽  
Toshihiko Ooie ◽  
Akihiro Utsumi ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Marine Bacterium ◽  
Pulsed Nd:Yag Laser

The effect of a pulsed-Nd:YAG laser irradiation on microstructure of human gingiva

1997 ◽  
Vol 27 (2) ◽  
pp. 317
Author(s):  
Kyung-Yoon Han ◽  
Kwang-Yong Shin ◽  
Chun-Seok Kim ◽  
Hyung-Soo Kim ◽  
Chang-Yup Yum ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Pulsed Nd:Yag Laser ◽  
Human Gingiva

scholarly journals Effects of Diode and Nd:YAG Laser Irradiation on Friction Forces Between Two Types of Ceramic Brackets and Rhodium-Coated Archwires

2021 ◽  
Vol 12 (1) ◽  
pp. e13-e13
Author(s):  
Hannaneh Ghadirian ◽  
Allahyar Geramy ◽  
Mohammad Ali Keshvad ◽  
Soolmaz Heidari ◽  
Nasim Chiniforush
Keyword(s):  
Laser Irradiation ◽  
Diode Laser ◽  
Nd:Yag Laser ◽  
Yttrium Aluminum Garnet ◽  
Testing Machine ◽  
Control Group ◽  
Friction Forces ◽  
X Ray ◽  
Custom Made ◽  
Ceramic Brackets

Introduction: Ceramic brackets have gained increasing popularity among dental clinicians and orthodontic patients but friction is a major concern when using them. This study sought to assess the effects of diode and Nd:YAG (neodymium-doped yttrium aluminum garnet) laser irradiation on friction forces between two types of ceramic brackets and rhodium-coated esthetic archwires. Methods: Thirty polycrystalline and 30 poly-sapphire brackets were divided into 6 groups (n=10) as follows: (I) control polycrystalline brackets (no laser irradiation), (II) polycrystalline brackets subjected to diode laser irradiation, (III) polycrystalline brackets subjected to Nd:YAG laser irradiation, (IV) control poly-sapphire brackets (no laser irradiation), (V) poly-sapphire brackets subjected to diode laser irradiation, and (VI) poly-sapphire brackets subjected to Nd:YAG laser irradiation. The bracket slots were laser-irradiated on a custom-made table. Sixty 5-cm pieces of rhodium-coated archwires were used for the friction test in a universal testing machine at a speed of 10 mm/min. Ten brackets from the six groups underwent scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDX). Results: The frictional resistance value of polycrystalline brackets was significantly higher than that of poly-sapphire brackets, irrespective of laser type (P<0.05). Irradiation of diode and Nd:YAG lasers, compared with the control group, had no significant effect on friction, irrespective of bracket type (P>0.05). Conclusion: It appears that diode and Nd:YAG laser irradiation cannot significantly decrease the friction. Future studies are warranted on different laser types with variable exposure.

Time-Resolved X-Ray Studies During Pulsed-Laser Irradiation of Ge

1984 ◽  
Vol 35 ◽  
Author(s):  
J.Z. Tischler ◽  
B.C. Larson ◽  
D.M. Mills
Keyword(s):  
Melting Point ◽  
Laser Irradiation ◽  
Pulsed Laser ◽  
Laser Pulses ◽  
High Energy ◽  
Measured Temperature ◽  
Time Resolved ◽  
Synchrotron Source ◽  
X Ray ◽  
Pulsed Laser Irradiation

ABSTRACTSynchrotron x-ray pulses from the Cornell High Energy Synchrotron Source (CHESS) have been used to carry out nanosecond resolution measurements of the temperature distrubutions in Ge during UV pulsed-laser irradiation. KrF (249 nm) laser pulses of 25 ns FWHM with an energy density of 0.6 J/cm2 were used. The temperatures were determined from x-ray Bragg profile measurements of thermal expansion induced strain on <111> oriented Ge. The data indicate the presence of a liquid-solid interface near the melting point, and large (1500-4500°C/pm) temperature gradients in the solid; these Ge results are analagous to previous ones for Si. The measured temperature distributions are compared with those obtained from heat flow calculations, and the overheating and undercooling of the interface relative to the equilibrium melting point are discussed.

Long-term effect of pulsed Nd:YAG laser irradiation on cultured human periodontal fibroblasts

2005 ◽  
Vol 36 (3) ◽  
pp. 225-233 ◽  
Author(s):  
Yi-Jane Chen ◽  
Jiiang-Huei Jeng ◽  
Chung-Chen Jane Yao ◽  
Min-Huey Chen ◽  
Lein-Tuan Hou ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Term Effect ◽  
Pulsed Nd:Yag Laser ◽  
Long Term Effect ◽  
Human Periodontal Fibroblasts
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