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امواج الکترومغناطیس پلاسمای الکترون- یون و الکترون- پوزیترون- یون غیریکنواخت کوانتومی مغناطیسی در حضور لیزر تب کوتاه | ||
فیزیک کاربردی ایران | ||
دوره 12، شماره 4 - شماره پیاپی 31، دی 1401، صفحه 23-42 اصل مقاله (2.16 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22051/ijap.2022.38853.1256 | ||
نویسندگان | ||
مریم اصغرزاده1؛ حسین زاهد* 2 | ||
1دانشجوی دکترا، گروه فیزیک، دانشکده علوم پایه، دانشگاه صنعتی سهند، تبریز، ایران | ||
2دانشیار، گروه فیزیک، دانشکده علوم پایه، دانشگاه صنعتی سهند، تبریز، ایران | ||
چکیده | ||
امواج الکترومغناطیس مربوط به مغناطوپلاسماهای الکترون- یون و الکترون- پوزیترون- یون غیریکنواخت در اندرکنش با لیزر تب کوتاه در حالت کوانتومی و در تقریب بسامد کوتاه مورد بررسی قرار گرفته است. در این پلاسماها پارامترهای اولیه شامل چگالی عددی، سرعت شارهای و میدان مغناطیسی خارجی در صفحه عمود بر انتشار لیزر به صورت غیریکنواخت میباشند. بررسیها نشان دادهاند که در صفحه عمود بر انتشار تب لیزر افزون بر اینکه مقدار این پارامترها بر سرعت انتشار امواج و میزان ناپایداری آنها مؤثر هستند، بلکه میزان شیب عرضی آنها نیز، به عنوان منبع انرژی، به شدت بر امواج انتشار یافته در این راستا تأثیرگذار است. رفتار امواج در راستای عمود، به ازای تغییر هر یک از شیبهای عرضی بررسی شده است. بررسیها نشان میدهد که رفتار امواج در راستای عمود در دو پلاسمای الکترون- یون و الکترون- پوزیترون- یون متفاوت هستند. در راستای موازی عاملی که بیشترین تأثیر را بر امواج میگذارد، نیروی اثر گذار لیزر است و این تاثیر به صورت مستقیم بر سرعت امواج و میزان ناپایداری آنها است. وابستگی امواج در راستای موازی به کمیتهای اولیه چگالی و سرعت اولیه به صورت مستقیم بوده و وابستگی آنها به میدان مغناطیسی تنها از راه حضور نیروی اثرگذار است. امواج در این جهت تحت تأثیر شیب عرضی کمیت های اولیه قرار نمیگیرند. امواج پلاسما در هر دو پلاسما نیز تحت تأثیر شرایط تصحیح کوانتومی قرار گرفته و سرعت و میزان ناپایداری آنها متأثر از این تصحیحات میباشد. نشان داده شده است که معادلات به دست آمده در کار حاضر در هماهنگی کامل با منابع بیان شده در مقاله است. | ||
کلیدواژهها | ||
موج الکترومغناطیس؛ پلاسمای الکترون- پوزیترون- یون؛ لیزر تب کوتاه؛ مغناطوپلاسما | ||
عنوان مقاله [English] | ||
Electromagnetic Plasma Waves in a Non-uniform Quantum Electron-Ion and Electron-Positron-Ion Magnetoplasmas in the Presence of a Short Pulse Laser | ||
نویسندگان [English] | ||
Maryam Asgharzadeh1؛ Hossein Zahed2 | ||
1PhD Student, Physics Department, Sahand University of Technology, Tabriz, Iran | ||
2Associate Professor, Physics Department, Sahand University of Technology, Tabriz, Iran | ||
چکیده [English] | ||
Electromagnetic plasma waves related to nonuniform electron-ion and electron-positron-ion plasma in interaction with short pulse laser in the quantum state have been investigated. These investigations have been done in low-frequency approximation. In these two plasmas, the initial quantities of number density, streaming velocity, and external magnetic field are inhomogeneous. The investigations have shown that in the perpendicular direction, the amount of these initial quantities affects the wave velocities, their instability rate, and their gradients affect the waves, strongly. The behavior of the perpendicular waves has been analyzed for variation in these initial quantities and the investigations show that these behaviors are different in these two plasmas. In the parallel direction, the factor that most affects the waves is the ponderomotive force related to the laser, so an increase in this force cause to increase in the wave velocities and their instability rate. The dependence of the parallel waves on the initial quantities of the number density and streaming velocity is direct, and their reliance on the external magnetic field is through the ponderomotive force (presence of laser). The waves in this direction are not affected by the transverse gradients of the initial quantities. The plasma waves in both plasmas have also been affected by the quantum correction terms. It has been demonstrated that our resulting equations are in accordance with the references mentioned in the article. | ||
کلیدواژهها [English] | ||
Electromagnetic Wave, Electron- Positron-Ion Plasma, Short Pulse Laser, Magnetoplasma | ||
مراجع | ||
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