skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Progresses on the Theoretical and Experimental Studies in Laser Technologies Research and Application Center In Kocaeli

Abstract

Laser Technologies Research and Application Center (LATARUM) was established in 2005 with interdisciplinary cooperation to obtain product based on projects, to train personnel with at highest academic level with knowledge to use latest technology. There are electro-optics, laser material processing and modelling and simulation groups working on projects. Theoretical modeling studies are performed for x-ray laser media. Ne-like nickel and iron and Ni-like tin and molybdenum x-ray laser media for different pumping laser configurations have been modeled using EHYBRID. Theoretical and experimental studies on spectrometer design for wavelength range between X-ray and IR are carried out by electro-optic group. Material processing studies using Nd-YAG laser are performed. Materials of titanium, aluminum and stainless steel have been welded in different laser pulse, power, and repetition rate conditions. Optimum parameters for these welding processes have been obtained.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;  [1]
  1. University of Kocaeli, Laser Technologies Research and Application Center, Kocaeli (Turkey)
Publication Date:
OSTI Identifier:
21057157
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 899; Journal Issue: 1; Conference: 6. international conference of the Balkan Physical Union, Istanbul (Turkey), 22-26 Aug 2006; Other Information: DOI: 10.1063/1.2733171; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; E CODES; IRON; LASER MATERIALS; LASER WELDING; MOLYBDENUM; NEODYMIUM LASERS; NICKEL; OPTICAL PUMPING; OPTICS; PLASMA SIMULATION; PROCESSING; PULSES; STAINLESS STEELS; TIN; TITANIUM; X RADIATION; X-RAY LASERS

Citation Formats

Akman, E., Atalay, B., Candan, L., Canel, T., Demir, A., Demir, P., Erturk, S., Genc, B., Kacar, E., Kenar, N., Koymen, E., Mutlu, M., Sinmazcelik, T., and Urhan, O.. Progresses on the Theoretical and Experimental Studies in Laser Technologies Research and Application Center In Kocaeli. United States: N. p., 2007. Web. doi:10.1063/1.2733171.
Akman, E., Atalay, B., Candan, L., Canel, T., Demir, A., Demir, P., Erturk, S., Genc, B., Kacar, E., Kenar, N., Koymen, E., Mutlu, M., Sinmazcelik, T., & Urhan, O.. Progresses on the Theoretical and Experimental Studies in Laser Technologies Research and Application Center In Kocaeli. United States. doi:10.1063/1.2733171.
Akman, E., Atalay, B., Candan, L., Canel, T., Demir, A., Demir, P., Erturk, S., Genc, B., Kacar, E., Kenar, N., Koymen, E., Mutlu, M., Sinmazcelik, T., and Urhan, O.. Mon . "Progresses on the Theoretical and Experimental Studies in Laser Technologies Research and Application Center In Kocaeli". United States. doi:10.1063/1.2733171.
@article{osti_21057157,
title = {Progresses on the Theoretical and Experimental Studies in Laser Technologies Research and Application Center In Kocaeli},
author = {Akman, E. and Atalay, B. and Candan, L. and Canel, T. and Demir, A. and Demir, P. and Erturk, S. and Genc, B. and Kacar, E. and Kenar, N. and Koymen, E. and Mutlu, M. and Sinmazcelik, T. and Urhan, O.},
abstractNote = {Laser Technologies Research and Application Center (LATARUM) was established in 2005 with interdisciplinary cooperation to obtain product based on projects, to train personnel with at highest academic level with knowledge to use latest technology. There are electro-optics, laser material processing and modelling and simulation groups working on projects. Theoretical modeling studies are performed for x-ray laser media. Ne-like nickel and iron and Ni-like tin and molybdenum x-ray laser media for different pumping laser configurations have been modeled using EHYBRID. Theoretical and experimental studies on spectrometer design for wavelength range between X-ray and IR are carried out by electro-optic group. Material processing studies using Nd-YAG laser are performed. Materials of titanium, aluminum and stainless steel have been welded in different laser pulse, power, and repetition rate conditions. Optimum parameters for these welding processes have been obtained.},
doi = {10.1063/1.2733171},
journal = {AIP Conference Proceedings},
number = 1,
volume = 899,
place = {United States},
year = {Mon Apr 23 00:00:00 EDT 2007},
month = {Mon Apr 23 00:00:00 EDT 2007}
}
  • A theoretical and experimental study of the dynamics of the electron density gradient in near-solid-density plasmas produced by the interaction of ultra-short laser pulses with solid targets at intensities between 10{sup 13} and 10{sup 16} W/cm{sup 2} and pulse duration between 0.12 and 2.5 ps is presented. X-ray spectroscopy of n=3 to n=1 resonance and dielectronic satellite lines is used to determine the range of electron densities in the plasma. Frequency-domain interferometry is employed to measure the expansion velocity and the electron density gradient scale length as a function of laser pulse duration and intensity. Quantitative agreement is noticed withmore » one-dimensional hydrodynamic simulations which include the solution of the wave equation for the laser field. {copyright} {ital 1997 American Institute of Physics.}« less
  • Cited by 2
  • The article presents novel method of combined therapy of superficial tumours based on excitation of ultrasonic waves in tumour tissues by means of ring-shaped waveguide with subsequent radiotherapy and results of its theoretical and experimental studies. Harmonic analysis of forced flexural vibration of the waveguide using ANSYS software and APDL (ANSYS Parametric Design Language) was implemented for determination of waveguide geometric parameters providing its resonance for the given excitation frequency. The developed finite element model accounts for interaction between the waveguide and tumour tissue as well as initial prestressing of tissue radially compressed by the waveguide. Resonant curves of themore » waveguide in terms of its thickness and diameter are calculated and presented. Experimental studies were performed in vivo on white rats with inoculated sarcoma M-1 tumours. Treatment was performed using ultrasound with frequency 22-23 kHz and intensity about 2 W/cm{sup 2}. Ultrasonic treatment was proved to be an efficient modifier of radiotherapy.« less
  • The paper presents the results of theoretical and experimental studies of the radiative properties of plasmas produced by heating and compression of various materials to high energy densities. The specific features of the theoretical plasma model known as the ion model, which is used to calculate the radiative characteristics of plasmas of complex chemical composition, are discussed. The theoretical approach based on this model is applied to the plasma produced during the explosion of the X-pinch wires. The theoretical estimate of the radiation efficiency is compared with the experimental data on the total energy yield from an X-pinch made ofmore » two different wires (NiCr and Alloy 188). The radiative characteristics of (C12 H16 O8) and (C8 H12 O6) plasmas are calculated for the temperature diagnostics of plasmas produced from porous targets employed in inertial confinement fusion experiments with the use of laser radiation and heavy-ion beams.« less
  • The optimization of any femtosecond laser requires the various sources of frequency chirp to be taken into account. In particular, for a passively mode-locked CPM ring dye laser, the effects of group velocity dispersion and self-phase modulation arising from time-dependent absorption saturation and the optical Kerr effect must be considered. In this paper a detailed experimental and theoretical study has been made of the role of these parameters in a Rhodamine 110 CPM dye laser. Periodic pulse evolutions are observed, when both positive and negative frequency chirp are present, which are reminiscent of those governed by the nonlinear Schrodinger equationmore » but which are, in fact, distinctly different. Similar results have been obtained with the standard Rhodamine 6G system and it is believed that the theoretical model is generally applicable to any passively mode-locked femtosecond dye laser. An important consequence of this work is that is permits the absolute value of the net group velocity dispersion in the laser cavity to be estimated.« less