نمذجة اعتماد الجسيمات المتهيجة في الهالة السالبة على زمن نهوض الجهد الكهربائي المسلط
Modeling the Dependence of the Excited Particles in the Negative Corona on the Time of the Applied Electric Potential
- الباحث
- علي حسين علي عبود
- المشرف
- قيس ذنون نجم
- الجامعة
- جامعة الموصل
- الكلية / القسم
- كلية التربية للعلوم الصرفة / قسم الفيزياء
- الشهادة
- ماجستير
- السنة
- 2023
- لغة الرسالة
- عربي
- الكلمات المفتاحية
- الهالة السالبة ; الجسيمات المتهيجة ; التفريغ الكهربائي ; النمذجة
Abstract
A The current study focused the effect of the time of rising voltage applied on the properties of the negative corona discharge in helium gas, especially its effect on excited particles in a concentric cylindrical system. The study included one-dimensional numerical modeling in the representation of the electrical discharge of the negative corona , based on the commercial Comsol program. The dimensions of the concentric system were chosen to meet the conditions for the electrodes in which the corona discharge occurs, as the radius of the axial electrode it is equal to (0.1 mm) while the outer electrode radius is (20 mm). . The axial electrode was connected to the high voltage source with a negative voltage of 1kV through a capacitive-resistance circuit and this circuit was used to control the voltage rise time. The mathematical model was based on the physical and chemical behavior of three main types of particles in the plasma, which are electrons and positive ions, in addition to excited particles. The model included seven basic reactions for the three types of particles involved in the interactions. The results showed that the fast rise time of the applied voltage produce, the density of the charged particles is large compared to the case of the slow rise time , while in all cases the density of excited particles remains almost constant at the initial value. After the applied voltage reaches a steady state, the excited particles density starts to increase. The highest increase in excited particles is when the voltage is stable for the relatively fast voltage rise time. It was concluded that the secondary electrons are responsible for the excitation reactions. --- page 115 [OCR+] --- Modeling the Dependence of the Excited Particles in the Negative Corona on the time of the Applied Electric Potential A. Thesis Submitted By Ali Hussein Ali Abboud TO The Council of the College of Education for Pure Science University of Mosul in Partial Fulfillment of the Requirements for the Degree of M.Sc. In Physics Supervised By Prof. Dr. Qais Thanon Algwari 2023 A.D. 1444 A.H. [OCR of page] Modeling the Dependence of the Excited Particles in the Negative Corona on the time of the Applied Electric Potential A. Thesis Submitted By Ali Hussein Ali Abboud TO The Council of the College of Education for Pure Science University of Mosul in Partial Fulfillment of the Requirements for the Degree of M.Sc. In Physics Supervised By Prof. Dr. Qais Thanon Algwari 2023 A.D. 1444 A.H. --- page 116 [OCR+] --- University of Mosul College of Education for Pure Science Modeling the Dependence of the Excited Particles in the Negative Corona on the time of the Applied Electric Potential Ali Hussein Ali Abboud M.Sc. Thesis Physics Supervised By Prof. Dr. Qais Thanon Algwari 2023 A.D. 1444 A.H. [OCR of page] University of Mosul College of Education Cees og WO for Pure Science Modeling the Dependence of the Excited Particles in the Negative Corona on the time of the Applied Electric Potential Ali Hussein Ali Abboud M.Sc. Thesis Physics Supervised By Prof. Dr. Qais Thanon Algwari 2023 A.D. 1444 A.H.
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