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Register a new userInstabilities in Electron Beam in a Dense Warm Inhomogeneous Plasma
اللااستقرارات لحزمة إلكترونية في بلازما كثيفة ساخنة غير متجانسة
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Aِl-Baath University ورقة بحثية
Publication date
2014
fields
Physics
and research's language is
العربية
Created by
Shamra Editor
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قمنا في هذا العمل بدراسة تأثير تغير كثافة البلازما على سلوك حزمة إلكترونية متجانسة باردة واردة على بلازما حارة غير متجانسة في الحالة التي تكون فيها السرعة الطورية للأمواج صغيرة مقارنة مع سرعة الحزمة. حيث تم تحديد جهة ورود الحزمة و جهة تدرج كثافة البلازما (اختيار النموذج الرياضي) آخذين بعين الاعتبار حالة عدم وجود حقل مغناطيسي خارجي و انتشار الاهتزازات الكهربائية الساكنة أحادية البعد بجهة انتشار الحزمة الإلكترونية و تدرج كثافة البلازما. ثم استخراج المعادلات الرياضية الموافقة لكل من الحزمة الإلكترونية و البلازما، و بعد ذلك قمنا بجعل المعادلات المدروسة خطية. لندرس معادلة الاستمرار و الشروط الحدية و نستخرج مركبات كثافة التيار الكهربائي و الحقول الكهرطيسية ثم ندرس حالة بلازما كثيفة التي تكون فيها البلازما تصادمية ثم استنتاج معادلة الطاقة الممتصة و ايجاد حلول المعادلات الناتجة و تحليلها و رسم الخطوط البيانية و مناقشتها.
We investigate the influence of the variable plasma density on the spatial growth of the beam-plasma instability, considering the model of homogeneous cold beam-inhomogeneous warm plasma system under the condition of the smallness of phase velocity of waves compared to the beam velocity. We determine a direction of the beam with unmagnatized plasma. Considering a one – dimensional electrostatic oscillation when the directions of beam propagation, plasma density gradient and wave electric field coincide with X-axis. To formulate mathematical equation of beam and plasma then we make studying equation linearized, and then study the continuity equation and boundary conditions. Formulating electric field density then study a case in which a plasma is collisional because of its high density and the temperature .Finally we drive absorbent energy and find solutions of these equations then draw it.
References used
THODE. L. E, R1977- Phys. Fluids. Los Alamos, New Mexico,2121P
Zaki.N.,Sahyouni. E W.M and El-Shorbagy. Kh. H, R1967-Plasma Heating and Second Harmonic Generation in Beam-Plasma System. Arab Jounal of Neuciear and Science Application,Cairo,9P
Gupta. G. P, Vijayan. T. & Rohatgi. V. K, R 1988 - phys. Fluids. USA, 11P
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