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Information × Registration Number 0212U004106, 0110U001120 , R & D reports Title Sensing devices based on radiation-hard semiconductor materials for mapping the magnetic fields of medical cyclotrons popup.stage_title Head Bolshakova Inessa, Доктор технічних наук Registration Date 27-01-2012 Organization Lviv Polytechnic National University popup.description2 A technology for aligning sensitive elements in magnetic measuring probes has been developed. It allows enhancing the accuracy of mapping the magnetic field, which is measured with the error below 0.1%. The effect of neutron irradiation on microcrystal and thin-film sensitive elements of magnetic measuring probes has been studied. The effect of neutron flux spectrum on the parameter change of InSb and InAs sensitive elements has been determined. A novel method of in-situ calibration of the mapping device based on the integration of two methods for magnetic field measurement - galvanomagnetic sensors and NMR probes, has been developed. This method makes it possible to carry out highly accurate measurements of magnetic field parameters and to offset the sensors' parameter drift under the effect of high radiation fields. Developed noise-immune methods of analog-to-digital conversion of magnetic field sensors' signals and means for signal filtering have allowed enhancing the accuracy of magnetic field measurement: relative separation between the approximation results for conversion function of Hall sensor matrix in the magnetic field range of cyclotron magnets below 0.01% and non-reproducibility error for magnetic field measurements below 20mkT, i.e. 0,002 %. A tentative sample of sensor multi-channel device designed for mapping the medical cyclotrons' magnetic fields has been developed, produced and tested. The performance and accuracy of the developed mapping device joined with the novel method of its calibration right within the studied magnetic field volume make this device an unique measuring instrument for high-precision research of the magnetic field distribution in cyclotron magnets. Product Description popup.authors Єрашок В.Е. Большакова І.А. Ворошило Г.І. Гумен С.С. Загачевський Ю.В. Ковальова Н.В. Когут І.В. Козаченко Л.М. Кость Я.Я. Левченко А.О. Макідо О.Ю. Мороз А.П. Палиняк І.В. Тер-Арутюнян Ю.С. Штабалюк А.П. Шуригін Ф.М. popup.nrat_date 2020-04-02 Close