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Analysis and Simulation the Effect of the Pierce Parameter on the Output of the Free Electron Laser system

The free electron laser is considered one of these important and advanced inventions because it provides a laser beam within various wavelengths of the electromagnetic spectrum. In any laser system device, several parameters must be available on which the efficiency and performance of the laser system are dependent. The Pierce parameter is one of the important parameters in measuring the performance quality of the free electron laser. In this paper, the simulation results were obtained using the MATLAB program to show the important effect of the Pierce parameter on the performance of the free electron laser system. The simulation results showed that the values of the Pierce parameter ranged between (0.01 - 0.03) for the laser beam with long wavelengths, while it ranged between (0.001-0.0001) for the short wavelengths. The results showed an increase in the efficiency values of the free electron laser system with increasing the values of the Pierce parameter, which represents the ratio between the saturation power and the power of the electron; therefore, it can be used as a specific threshold to measure the efficiency of the laser system. Additionally, the simulation of the Pierce parameter has a direct relation to the small signal gain per unit length.

Publication Date
Thu Jan 31 2019
Journal Name
Journal Of The College Of Education For Women
Assess the quality of air Basra province

Iraqi provinces suffer many of the environmental problems, appear explained these problems in the city of Basra, Basra, the largest province and is among Iraq's provinces in the annexation of oil fields, which is experiencing an oil production operations of large, it suffers from the burning of gas associated with oil extraction resulting in the emission severe gas process including toxic hydrogen sulfide gas (h2S) and oxides of carbon, sulfur and nitrogen in addition to the release of toxic metal elements such as mercury, arsenic, vanadium, which caused the man many serious diseases. , And perhaps one of the most important of these problems are worsening air quality and increasing cases of air pollution and the deterioration of the qual

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Publication Date
Sun Mar 12 2017
Journal Name
Al-academy
Expressive speech in the art of acting

The expressive speech in the art of acting is considered to be the leading action for thinking and the interior interaction of the individual, in the organization of his relationship with the elements of the environment and its content, and the more acquired the individual's performance today skills in organizing and export of his conflicts and natural occasions , whenever , becomes more adaptable and an interpreted physically and acoustically inside pluralities in personalities, suited to the modern age. This research has addressed a range of topics related to expressive speech in the art of acting, since the first chapter included a systematic framework of the research, represented by the problem , the importance and aims of research t

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Publication Date
Sat Oct 01 2016
Journal Name
Al–bahith Al–a'alami
Semiotics of Senses in the Holy Quran

This study is based on the basic idea: that human communication does not stop at the limits of words spoken, but extends to include the movements of the body and its members, such as the face, hand, eye, hearing, touch, taste, sensation and the public body.
The human movements represented by polarization, frowns, tattoos, and movements are all auxiliary tools that reach meanings and affect others greatly.
 Perhaps their importance is also in their ability to translate what is going on in the soul, and to show it to the outside body members, without the control of the human in many cases, it is thus an important factor in the process of human communication.
The purpose of this study is to show the senses of the senses in the

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Publication Date
Thu Jun 01 2023
Journal Name
Baghdad Science Journal
Modeling The Power Grid Network Of Iraq

Recently, the theory of Complex Networks gives a modern insight into a variety of applications in our life. Complex Networks are used to form complex phenomena into graph-based models that include nodes and edges connecting them. This representation can be analyzed by using network metrics such as node degree, clustering coefficient, path length, closeness, betweenness, density, and diameter, to mention a few. The topology of the complex interconnections of power grids is considered one of the challenges that can be faced in terms of understanding and analyzing them. Therefore, some countries use Complex Networks concepts to model their power grid networks. In this work, the Iraqi Power Grid network (IPG) has been modeled, visua

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Publication Date
Sun Jan 01 2023
Journal Name
Ssrn Electronic Journal
The Concept of Urbanization in Developing Countries

The population density witnessed by the capital, Baghdad, due to successive wars and unemployment, is linked to the phenomenon of urbanization, which is a global phenomenon that means the increasing tendency of the rural population to reside in cities (urban), especially concentration in the capital, Baghdad. Therefore, the phenomenon of urbanization is associated with 3 terms: migration, countryside, and city. Migration is when a person or a group leaves their place of residence to move to live in another place with the intention of staying in the new place for a long time. As for the countryside: they are the areas surrounding cities usually, and the countryside is characterized by natural and agricultural areas and is considered an outle

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Publication Date
Sun Feb 10 2019
Journal Name
Journal Of The College Of Education For Women
The Properties of Thermal Waves Affecting Iraq

This research aims at studying each of the cold and hot thermal wavelengths affecting
Iraq for a minimum climatic course of 11 years beginning from 1992 till 2002. Three stations
were selected including the parts of Iraq surface: Mosul, Baghdad and Basrah.
The wave days were also connected with the related climatic elements represented by
the wind direction and speeds and the relative humidity. It was shown that Iraq is affected by
the rates of hot thermal wave lengths greatly compared to the rates of cold wavelengths. The
results suggested that the highest rate of hot and cold wavelengths recorded over Basra station
was (3.5) days for the cold and (5) days for the hot. While the lowest rates was at Mosul
station

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Publication Date
Mon Feb 19 2018
Journal Name
Al-academy
Performance of the comedian in Moliere plays

This research aims to study the performance of comedian in the plays of writer Moliere . The problem of research is to answer the following question:      How does comedian Moliere's techniques in a number of his plays and funny acts?   The    research aims at revealing the means used by the comedian in his performance of a comedic character in the number of Moliere plays.                                                 

   &

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Publication Date
Sun Aug 13 2017
Journal Name
Ibn Al-haitham Journal For Pure And Applied Sciences
The Prevalence of Bacteriuria in Pregnant Women

     This research was conducted in (Baghdad Teaching hospital) and (Al-Alwiya obstetrics hospital). The Samples were as follows : (150) (Pregnant women) in different times of pregnancy. (25) Married women (non pregnant) . (25) Un married women Capable of pregnancy . The range of their ages was (18-45) years. (10) Samples were taken from pregnant women with no evidence of infection as (Control) for the comparison of number and type of bacteria which exists naturally (in area surrounded external opening of urinary duct) (Urethral meatus) of the infected pregnant women . The result showed that Staphylococcus Saprophyticus is a common Cause in these infections .appearing in (19%) of the studied group, while klebsiella wa

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Publication Date
Wed Dec 07 2011
Journal Name
Journal Of Planner And Development
Change in the centers of historical cities

The historical center cities were exposed to change, which included its social and economical structures, Which led to sweeping changes in land use, causing a change in the result, in urban fabric and the physical structure and therefore to see visual. We have attracted these centers as a result of pressure from urban development and contemporary reflection of the agents of change which have been hit during the late period a development residential newly not sympathize mostly with the content of the historical and at the expense of removing large parts of the urban fabric and replace it with patterns of structural and styles of architecture has not been connected with reality. Which led to the loss of some historical and architec

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Publication Date
Sun Sep 01 2019
Journal Name
Journal Of Legal Sciences
Legal Nature of the Central Criminal Court

In this paper, we discussed the legal nature of the Central Criminal Court with two demands: the first relates to the legal basis of the Central Criminal Court, and the second is related to the criminal justice system.

          With regard to the first demand, we have highlighted the stage after the change of the political system in Iraq in 2003 and the subsequent assumption of the US Governor for Civil Administration Affairs in the country and the issuance of a number of resolutions, including what we discussed in the first section (the first legislation No. 13 of 2003 ), Which included twenty-three sections, some showing how the Central Court was formed and the most important rules

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