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Iraqi Journal of Applied Physics Letters

الرسائل العراقية في الفيزياء التطبيقية

ISSN: 1999656X
Publisher: iraqi society for alternative and renewable energy sources and techniques
Faculty:
Language: English

This journal is Open Access

About

Iraqi Journal of Applied Physics (IJAPLett) is a scientific periodical sponsored and
published by the Iraqi Society for Alternative and Renewable Energy Sources and
Techniques (I.S.A.R.E.S.T.). The Editorial Board is responsible for the scientific content
and other editorial matters relating to the Journal. Manuscripts submitted are first screened
by the editors; those on subject matters within the scope of the IJAPLett are sent to an
expert referee for evaluation and may be sent to a second reviewer if necessary. This
screening process helps to assure an appropriate focus as well as high scientific quality of
the Journal. The IJAPLett welcomes submission of papers and letters in applied physics
and related fields of science, engineering and technology. They should have something in
common with what we now publish on inanimate materials and processes therein:
structures, transport, physical, electrical, dielectric, magnetic, and optical properties. Our
basic criterion stated below will continue to apply: papers must contain science, especially
physics, and there must be an application. We advise authors submitting papers to suggest
the names of at least two possible reviewers, with full information on addresses, phone and
e-mail. Suggestions of reviewers are welcome regardless of the subject.

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Contact info

P. O. Box 55259,
Baghdad 12001,
Iraq
Website: www.iraqiphysicsjournal.com
Email: admin@iraqiphysicsjournal.com
editor_ijap@yahoo.co.uk

Table of content: 2009 volume:2 issue:1

Article
Design and Simulation of DPSS Laser with SHG for Material Processing

Authors: A.A. Alsharify
Pages: 3-8
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Abstract

In the present work, multilayer reflection coating analysis has been employed for design and simulating diode-pumped solid state (DPSS) laser system with second harmonic generation (SHG) using composite crystal (DPM010X). It was found that the optical reflection greatly depends on the refractive index, optical thickness and number of anti-reflection coating layers used. The calculated refractive index was found to be 1.949 for phase matched angle of 23.2° for the KTP non-linear crystal.

Keywords

DPSSL --- SHG --- KTP --- Nonlinear crystal --- Optical pumping


Article
Complex Magnetic Investigation of Ferritic Stainless Steel

Authors: I. Mézáros --- A.S. Mahmood
Pages: 9-11
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Abstract

Magnetic Barkhausen noise measurement (MBN) is a relatively new nondestructive detection technique. Its working principle is based on Barkhausen discontinuities or noise when a ferromagnetic material is subjected to a varying magnetic field. MBN is being used to characterise the stress state of a ferritic stainless steel (AISI 430). Other magnetic parameters such as saturation induction (BMax), remnant induction (BR), coercive field (HC) and maximal relative permeability (PMax) derived from the hysteresis loop have also been used to support the results achieved using MBN. Microstructural changes due to cold working and heat treatments were characterized by the applied magnetic measurements. The MBN technique was proved to be a useful non-destructive and quantitative method for microstuctural investigation of the investigated ferritic stainless steel.


Article
Temperature-Dependent Birefringence Properties of Be3Al2Si6O18 Crystal

Authors: M.A. Albarazanchy --- I.K. Hama --- G.M. Najeeb
Pages: 12-14
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Abstract

The temperature dependence of the refractive indices for ordinary and extraordinary rays of mercury spectrum three lines and laser line independently one from the other were measured in temperature interval 20-600°C. It was obtained that the refractive indices increase along with the temperature growth and this dependence has quasilinear character. Emerald has quite low birefringence values that increases slightly along with the temperature growth and decreases with wavelength growth. The thermooptical coefficients for every wavelength were calculated. They have greater values for the extraordinary beams than for the ordinary ones. The dispersion curve for refractive indices was obtained.


Article
Illumination and Dark Current-Voltage Characteristics of Polymer-Silicon Heterojunction Solar Cells

Authors: H.M. Mikhlif
Pages: 15-18
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Abstract

In this work, polymer-on-silicon solar cells were fabricated by coating different silicon substrates with conductive polyaniline layers. Different substrates with different resistivities were used to control the diffusion length of such configurations. Electrical measurements were performed in both illumination and dark conditions to study the characteristics of photogenerated carriers in the polymer layer contributing to the output of such solar cells. They show good agreement with the “hole mobility only” model for intensities ranging from 1% of AM1.5 up to AM1.5. In addition to low cost fabrication and less-complex technology, such design interestingly compete the conventional and advanced configurations of solar cells.


Article
Employing Inner Triplet Upgrade in Cold Mass Cooling Design for Large Hadron Collider

Authors: F.M. Alshimmary --- A.F. Almaliki --- S.H. Alhadithi
Pages: 19-22
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Abstract

A luminosity upgrade of the CERN Large Hadron Collider (LHC) is planned to coincide with the expected end of life of the existing inner triplet quadrupole magnets. The upgraded inner triplet will have much larger heat loads to be removed from the magnets by the cryogenics system. As part of the LHC Accelerator Research Program (LARP), a design study has been completed to investigate the required characteristics of the cold mass cooling system within the framework of a design temperature profile. These characteristics are the beam pipe annulus, collar radial cooling channels, yoke radial cooling channels, yoke longitudinal cooling channels, and heat exchanger connecting pipe. Using these parameters in conjunction with energy deposition calculations, longitudinal and radial temperature profiles for an entire inner triplet are calculated and presented.


Article
Effect of pH Value on the Photoconductivity of Chemically Deposited CdS Thin Films

Authors: S.M.H. Aljawad
Pages: 23-26
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Abstract

Highly photosensitive CdS thin films with photocurrent to dark current ratio (Iph/Id) of ~105 under 300W.m-2 illumination were reported. The films are prepared by an electroless chemical deposition technique. The pH value of the solution used in the electroless deposition of cadmium sulfide thin films has been found to affect the deposition rate, optical transmission, photoconductivity, photoconductivity to dark conductivity ratio Cph/Cd and photocurrent decay time.


Article
Characterization of SiC/SiC Composites Used for Power Plant Blanket

Authors: K.M.Y. Hasan --- N.I.M. Elkashif --- S.A.M. Ebrahim
Pages: 27-30
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Abstract

This paper describes the results of an exploratory study of blanket concepts based on SiC/SiC structure and LiPb breeder. An assessment of the performance of these concepts for advanced power plant application is presented, key issues are identified, and constraints relating to the SiC/SiC properties are discussed.


Article
Effect of Self-Absorption on the Output Power of CW CO2 Laser

Authors: O.A. Hamadi --- D.N. Raouf --- N.A.K. Alrubaiey
Pages: 31-34
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Abstract

In this work, the effect of self-absorption by molecules of the active medium on the output laser power of a low-pressure CW CO2 laser was studied. The effects of discharge current, output coupling and total gas pressure on the output laser power were discussed. It was explained that the self-absorption depends on CO2 concentration, output coupling and discharge current and there is a threshold value for both output coupling and discharge current at which the absorption is clearly effective.

Table of content: volume:2 issue:1