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Information × Registration Number 0214U003662, 0113U005174 , R & D reports Title Synthesis the textured diamond substrates for the production of radiation detectors for radiation dosimetry support nuclear technology popup.stage_title Head Strel'nitskij Vladimir Evgenievich, Доктор фізико-математичних наук Registration Date 11-02-2014 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 Research report: 30 p., figure 17, table 1, references 11. Object of research was CVD-method of diamond coatings deposition for creation the detectors of ionizing radiation, pretreatment methods of diamond substrates and their electrical properties. The purpose of the Project was to study the influence of the scale factor on the formation of the textured diamond coatings and development the methods for pre-processing the diamond films for the production of radiation detectors. The method of research was an experimental study of the effect of the scale factor on the growth rate of diamond coatings, structural homogeneity of the diamond coating along the substrate holder, effect on the characteristics of diamond coatings of different methods of their pre-processing in the manufacture of radiation detectors. The modernization of the plasma excitation unit of plasma set up for the diamond coatings synthesis have been made. Increasing the substrate holder diameter from 20 mm to 42 mm results in increasing production of diamond substrates for radiation detectors in three times. Previous studies of characteristics of the diamond coatings deposited on the substrate holder 42 mm in diameter showed that the coating may have a resistivity value is not much smaller than had the diamond coatings previously grown on a substrate holder with a diameter of 20 mm. The diamond coatings also have a relatively low non-uniformity along the substrate surface and satisfactory within a separate sample. For diamond coatings with quality not worse than they had when grown under optimized conditions at the substrate with diameter of 20 mm required corrections of the deposition conditions in connection with changes in the size of the substrate holder. A pilot batch of samples of diamond substrates have been produced for study the working conditions of their pre-processing and manufacturing on its basis the radiation detectors. The methods of pre-processing (preparation of the silicon substrate, high-temperature annealing, deposition the metal contacts) of the polycrystalline diamond films for the production of radiation detectors have been developed. Detectors have been produced and comparative studies of their electrophysical properties and the response of an alpha particles have been studied. The method of calibration of diamond detectors on the absorbed dose of electron and gamma radiation has been developed. Measurements of the detector sensitivity, carried on the NSC KIPT's accelerator LU-10, showed that for each type of radiation it was occurred the similar values of sensitivity and they are consistent with obtained previously values for the radiation fields of low intensity. High radiation resistance of CVD-diamond ensures its use in a processing dosimetry. It was measured the profile of slowing-down radiation of an electron accelerator LU -10 with using a detector on the base of polycrystalline diamond film. Product Description popup.authors Богдан Євгенія Олександрівна Вєрьовкін Андрій Олексійович Грицина Василь Іванович Дудник Станіслав Федорович Кошевий Костянтин Іванович Кутній Володимир Євдокимович Наконечний Дмитро Вікторович Опалев Олег Анатолійович Пироженко Людмила Олексіївна Решетняк Олена Миколаївна Рибка Олександр Вікторович Стрельницький Володимир Євгенійович Уваров Вячеслав Лаврентійович Чечина Марина Вікторівна Шляхов Ілля Миколаевич popup.nrat_date 2020-04-02 Close