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Development of a Software for Rreconstruction of Neutron spectrum
Yousefnejad, Sirous | 2015
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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 46792 (46)
- University: Sharif University of Technology
- Department: Energy Engineering
- Advisor(s): Vossoughi, Naser; Etaati, Gholamreza
- Abstract:
- Dealing with natural and handmade radioactive materials and sources is of major aspects of nuclear science and technology. Useful applications of these materials and sources in different fields, such as energy production and health physics, caused the necessity of developing the detection and radiation protection methods. Each of these methods uses different equipment and approaches which are based on different kinds of radiations and radioactive sources. Despite the given ability of radiation detection, in some cases, recognition, distinguish, and estimation of a source radiation level is impossible due to bad effects of these equipment on measured spectrum. Detection of neutron spectrum in mixed neutron-gamma fields is one of this cases. Some numerical methods have been developed in order to eliminate equipment effects and unfold source radiation real spectrum. These methods are known as unfolding methods. The goal of this thesis is to investigate different kinds of unfolding methods, examine their features, and develop a software based on the chosen methods. After developing the software, in order to validate its performance , the neutron-gamma field of Am-Be source was discriminated. The neutron spectrum is unfolded and the results are compared with real spectrum. Zero crossing is the method used for discrimination of mixed field
- Keywords:
- Neatrons ; Neutron Spectra ; Inverse Problem ; Neutron Sourses
- محتواي کتاب
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- مقدمه
- آشکارسازی و طيفسنجی پروتون پسزده
- بررسی روشهای بازیابی طیف ـ بخش اول: روشهای عددی
- مقدمه روشهای بازیابی
- مقدمه فصل
- معرفی دستگاههای معادلات با شرایط بد
- مرورری کوتاه بر مفاهیم موردنیاز
- تحلیل حساسیت داده در دستگاههای خطی
- معرفی دو سیستم شناختهشده و پرکاربرد با شرایط بد
- بازیابی به روش تجزیه مقادیر تکینه
- بازیابی به روش پیششرط گذاری
- روش مقیدسازی تیخونوو
- روشهای گرادیان مزدوج
- بازیابی به روش تابکاری شبیهسازی شده
- روشهای شبهنیوتونی
- نتیجهگیری فصل
- بررسی روشهای بازیابی طیف ـ بخش دوم: روشهای احتمالاتی
- معرفی نرمافزار تولیدی و زیرروالهای آن
- بحث و نتیجهگیری
- جمعبندی و پیشنهادات
- پیوست الف
- مراجع