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Registration Number

0215U002542, 0113U005174 , R & D reports

Title

Synthesis the textured diamond substrates for the production of radiation detectors for radiation dosimetry and support the nuclear technology

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Head

Strel'nitskij Vladimir Evgenievich, Доктор фізико-математичних наук

Registration Date

06-01-2016

Organization

National Science Center "Kharkiv Institute of Physics and Technology

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Scientific report: 35 p., pictures 20, table. 6, 2 references. Object of research - the method of gas-phase chemical vapor deposition the diamond substrates for detectors, detectors of ionizing radiation based on diamond substrates. The aim of the project is improving the methods of the diamond textured substrates synthesis and detectors of ionizing radiation based on polycrystalline diamond films manufacturing and completion of detector tests on the electron accelerator. The method of research is experimental study the influence of surface treatment of silicon wafers on defect structure of diamond coatings, study the effect of the whole process of making the diamond wafers on their electrical properties and characterization of diamond detectors under electronic and gamma irradiation on electron accelerator. Optimization of chemical treatment of the surface of silicon wafers to remove defective surface layer that is formed during its cutting and polishing have been performed. Growth of polycrystalline diamond coatings on the single crystal silicon substrates which have been prepared at optimized conditions of chemical surface treatment, provides 100% yield of diamond substrates. Diamond substrate obtained in optimum conditions have values of specific resistivity 3,7 o 1014 ± 18% ohm ? cm, which practically did not go beyond the value of its error determination. The thickness of the diamond substrate had an average size of 210 ± 10% microns. With the help of radiation-resistant detector which is placed in a ceramic housing it was conducted the profile of an electron beam of accelerator LU-10. It was defined the analog sensitivity of the multichannel coordinate-sensitive detector in the fields of electron and deceleration radiation. A direct measurement of the profile of the electron beam have been made at the output of an electron accelerator. It was conducted the continuous online monitoring of deceleration radiation of electron accelerator LU-10 with the help of multichannel diamond detector and a specially created system of measurements. Detectors based on CVD diamond substrates can be used for technological dosimetry of electron and deceleration radiation in the range of values of absorbed dose rate 3 ... 2500 Gr / s, the energy of electrons and gamma-ray photons 10 ... 40 MeV at a value of radiation resource of diamond detector at least ~ 107 Gr and such diamond detector was implemented in SRK "Accelerator" of NSC KIPT.

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Вєрьовкін Андрій Олексійович
Грицина Василь Іванович
Дудник Станіслав Федорович
Кошевий Костянтин Іванович
Кутній Володимир Євдокимович
Наконечний Дмитро Вікторович
Опалев Олег Анатолійович
Пироженко Людмила Олексіївна
Пояркова Світлана Сергійовна
Решетняк Олена Миколаївна
Рибка Олександр Вікторович
Стрельницький Володимир Євгенійович
Уваров Вячеслав Лаврентійович
Чечина Марина Вікторівна
Шляхов Ілля Миколаевич

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2020-04-02