Increasing the conversion efficiency of KTP crystal using the pump-power technique

Raied K. Jamal; Russul Khalil Rustum

doi:10.30723/ijp.v18i44.508

Details

Publication Date

Sun Mar 01 2020

Journal Name

Iraqi Journal Of Physics

Volume

18

Issue Number

44

DOI

10.30723/ijp.v18i44.508

Choose Citation Style

Statistics

View publication

9

Abstract Views

513

Galley Views

351

Statistics

Increasing the conversion efficiency of KTP crystal using the pump-power technique

pump-probe technique

second harmonic generation

KTP crystal.

Raied K. Jamal

Russul Khalil Rustum

...Show More Authors

In this study, the effect of pumping power on the conversion efficiency of nonlinear crystal (KTP) was investigated using laser pump-power technique. The results showed that the higher the pumping power values, the greater the conversion efficiency (η) and, as the crystal thickness increases within limitations, the energy conversion efficiency increases at delay time of (0.333 ns) and at room temperature. Efficiency of 80% at length of KTP crystal (L = 1.75 X 10^-3 m) and P_in = 28MW, and also, compare the experimental results with numerical results by using MATLAB program.

View Publication Preview PDF

Quick Preview PDF

Publication Date

Mon May 01 2023

Journal Name

Journal Of Engineering

Experimental Investigation of Heat Transfer Enhancement in a Double Pipe Heat Exchanger Using Compound Technique of Transverse Vibration and Inclination Angle

Double pipe heat exchanger

Inclination angle

Resonance frequency

Enhancement factor

Effectiveness

Hameed D.

Didar O.

...Show More Authors

Numerous tests are recently conducted to assess vibration's role in accelerating the heat transfer rate in various heat exchangers. In this work, the enhancement of heat transfer by the effect of transfer vibration and inclination angles on the surface of a double pipe heat exchanger experimentally has been investigated. A data acquisition system is applied to record the data of temperatures, flow rates, and frequencies over the tests. A compound technique was adopted, including the application of a set of inclination angles of (0°, 10°, 20°, and 30°) under the effect of frequency of vibration ranging from sub-resonance to over-resonance frequencies. The results showed that the overall heat transfer coefficient enhan

View Publication Preview PDF

(5)

Publication Date

Fri Mar 20 2020

Journal Name

Plant Archives (09725210) 20 (2)‏

Influence of some factor on somatic embryos induction and germination of date palm CV barhi by using cell suspension culture technique.‏

Moayad Rajab Abood

...Show More Authors

Publication Date

Thu Oct 01 2020

Journal Name

August

INFLUENCE OF SOME FACTOR ON SOMATIC EMBRYOS INDUCTION AND GERMINATION OF DATE PALM BARHI C.V BY USING CELL SUSPENSION CULTURE TECHNIQUE

Ali . A

...Show More Authors

INFLUENCE OF SOME FACTOR ON SOMATIC EMBRYOS INDUCTION AND GERMINATION OF DATE PALM BARHI C.V BY USING CELL SUSPENSION CULTURE TECHNIQUE

Publication Date

Mon Apr 06 2020

Journal Name

August

INFLUENCE OF SOME FACTOR ON SOMATIC EMBRYOS INDUCTION AND GERMINATION OF DATE PALM CV BARHI BY USING CELL SUSPENSION CULTURE TECHNIQUE

This study was done to examine different concentrations of mercuric chloride (Hgcl2) for Explants sterilization and different concentration of NAA) mg/L with 2iP for their effect on initiation primary callus and subsequent embryogenesis in Phoenix dactyliferae cultivar Barhi. Leaf primordial and shoot tips were excised from 2-3 years old offshoot. The result showed that contamination percentage decreased with an increase in concentration of Hgcl2 for two explants where in the control (0.0)% gave highest value 75% and 62.5% of contamination for leaf primordial and shoot tip respectively while the addition (0.1)% gave a significant decrease 37.5 and 0% for explants respectively. The Explants were inoculated onto Murashiege and Skoog

1962 (MS) medium supplemented with 2iP 3mg/L and containing 0

25

50 or 100 mg/L of NAA

the addition (50) mg/L of NAA gave highest value 68.8% in percentage of callus initiation with significant difference from addition 0% gave lowest value (18.8)%

as well Explants of shoot tip gave significant difference was 53.1% while leaf primordial gave 28.1%

Primary callus was transferred to fresh MS medium containing (0

5

10 and 20) mg/L of NAA with 3mg/L 2iP

Results were recorded after 12 weeks. A highest value of embryonic callus induction percentage or fresh weight and dry weight 87.5% or 1.56g and 0.47g for the character respectively for the treat 20 mg/L while control treatment 0.0 gave the lowest value 12.5% or 0.37g and 0.14g for same character respectively. Inoculated 1g fresh biomass into a 250 ml Erlenmeyer flask containing 50 ml MS liquid medium supplemented with NAA 20mg/L and agitated at 150 rpm by shaker to making suspension culture the measurements of packed cell volume ( pcv) or fresh and dry weight taken weekly for 12 weeks

maximum values were reached in the eighth week of PCV and fresh weight but the dry weight reached to highest value in seventh week

then the curve began to decline gradually until it reached stability in the last two weeks. The cell suspension was Diluted to different initial cell density of 100

500

10000

50000 and 100000 cells /ml with hemocytometer. The initial cell number of (10000) cells gave significant different of plating efficiency PE (11.6)% while (100) cells gave lowest value 1.8% of PE.

Ali A.

...Show More Authors

View Publication

Publication Date

Fri Jul 05 2024

Journal Name

Journal Of Applied Spectroscopy

Spectrophotometric Method Using the Derivative for the Determination of the Drug Losartan

Maha A.

Kawther Ahmed

Elham N.

Dheefaf F.

...Show More Authors

View Publication

Publication Date

Sat Dec 01 2012

Journal Name

Journal Of Economics And Administrative Sciences

The Economic Feasibility of the beekeeping project Using the method of mobile promiscuous

الجدوى الأقتصادية

The Economic Feasibility

حميد عبيد

مأمون احمد

عايدة نعمة

...Show More Authors

An update of our research is the first to develop and reform the agricultural sector . and promoting production and productivity of this sector multi-sources , which is the management and beekeeping one source . Been applied to the style of beekeeping mobile promiscuous includes twentieth cell in the Iraqe project of mussiab . in which there exist a variety of crops and trees .

Experiment had proved successful and led to raise the level of npoduction of single Dell of the honey to 49 kg over the previous year and surpassed the average production percell in the province of Babylon , which the amount of 13.945 kg , another

View Publication Preview PDF

Publication Date

Fri Jun 20 2025

Journal Name

Journal Of Baghdad College Of Dentistry

A study to compare the cleaning efficiency of different irrigation systems for macro debris removal in instrumented canals (An in vitro study)

Hussein A

Mohammed R

...Show More Authors

Background: Irrigation of the canal system permits removal of residual tissue in the canal anatomy that cannot be reached by instrumentation of the main canals so the aim of this study was to compare and evaluate the efficiency of conventional irrigation system, endoactivator sonic irrigation system,P5 Newtron Satelec passive ultrasonic irrigation and Endovac irrigation system in removing of dentin debris at three levels of root canals and to compare the percentage of dentin debris among the three levels for each irrigation system. Materials and methods: Forty extracted premolars with approximately straight single root canals were randomly distributed into 4 tested groups of 10 teeth each. All canals were prepared with Protaper Universal ha

View Publication Preview PDF

Publication Date

Mon Jun 01 2020

Journal Name

Iraqi Journal Of Physics

Effect depositions parameters on the characteristics of Ni0.5Co0.5Fe2O4 nanocomposite films prepared by DC reactive magnetron Co-Sputtering technique

Magnetron sputtering

Reactive sputtering

Spinel ferrites

Thin films

Tawfiq S.

Firas J.

...Show More Authors

In this work, spinel ferrites (NiCoFe₂O₄) were prepared as thin films by dc reactive dual-magnetron co-sputtering technique. Effects of some operation parameters, such as inter-electrode distance, and preparation conditions such as mixing ratio of argon and oxygen in the gas mixture, on the structural and spectroscopic characteristics of the prepared samples were studied. For samples prepared at inter-electrode distance of 5 cm, only one functional group of OH^- was observed in the FTIR spectra as all bands belonging to the metal-oxygen vibration were observed. Similarly, the XRD results showed that decreasing the pressure of oxygen in the gas mixture lead to grow more crystal planes in the samples prepare

View Publication Preview PDF

(6)

Publication Date

Tue Oct 20 2020

Journal Name

Ibn Al-haitham Journal For Pure And Applied Sciences

Employ Shrinkage Estimation Technique for the Reliability System in Stress-Strength Models: special case of Exponentiated Family Distribution

Exponentiated Family Distribution

Reliability of multicomponent Stressâ€“Strength models

Maximum likelihood estimator

Shrinkage estimator and mean squared error.

Eman

Abbas

...Show More Authors

A reliability system of the multi-component stress-strength model R_(s,k) will be considered in the present paper ,when the stress and strength are independent and non-identically distribution have the Exponentiated Family Distribution(FED) with the unknown shape parameter Î± and known scale parameter Î» equal to two and parameter Î¸ equal to three. Different estimation methods of R_(s,k)were introduced corresponding to Maximum likelihood and Shrinkage estimators. Comparisons among the suggested estimators were prepared depending on simulation established on mean squared error (MSE) criteria.

View Publication Preview PDF

Publication Date

Sun Apr 16 2017

Journal Name

Ibn Al-haitham Journal For Pure And Applied Sciences

The Structural and Surface Morphology Properties of Aluminum Doped CdO Thin Films Prepared by Vacuum Thermal Evaporation Technique.

CdO:Al thin films

structure properties

XRD

AFM

SEM

Alia A.

Samir A.

Ayad A.

...Show More Authors

Undoped and Al-doped CdO thin films have been prepared by vacuum thermal evaporation on glass substrate at room temperature for various Al doping ratios (0.5, 1 and 2)wt.% . The films are characterized by XRD and AFM surface morphology properties. XRD analysis showed that CdO:Al films are highly polycrystalline and exhibit cubic crystal structure of lattice constant averaged to 0.4696 nm with (111) preferred orientation. However, intensity of all peaks rapidly decreases which indicates that the crystallinity decreases with the increase of Al dopant. The grain size decreases with Al content (from 60.81 to 48.03 nm). SEM and AFM were applied to study the morphology an

View Publication Preview PDF

1 2 ... 73 74 75 76 ... 2707 2708