İMECE uydusu için radyasyon ortamı tahminleri ve ODTÜ-SDH projesi için yapılan G4Beamline simülasyon çalışmaları.

IMECE Satellite will be an Earth observation satellite in Low Earth Orbit (LEO) planned for launch after 2020. Electronic components of the IMECE Satellite will be exposed to a radiation environment in its orbit in space which consists mostly of relativistic charged particles. This radiation environment which can affect the performance and reliability of sensitive materials and electronics is studied using the SPENVIS program. After simulating the space radiation environment, sensitive electronic components and materials intended for space use must be tested to qualify as radiation tolerant components. Radiation effects can be categorized in three groups; Single Event Effects (SEE), Total Ionizing Dose (TID) and Non-Ionizing Dose Displacement Damage Effects. Currently, TID tests can be, but SEE tests cannot be conducted in Turkey. To perform SEE tests, a beam line is being constructed in the R&D room of the Turkish Atomic Energy Agency (TAEA) Sarayköy Nuclear Research and Training Center (SANAEM) Proton Accelerator Facility (PAF). The beam line will provide a final beam profile and energy that will satisfy the requirements of the ESA-ESCC No:25100 standard. To obtain a beam with the desired parameters, quadrupole magnets and collimators after scattering foils are employed. The radiation dose, received by various beamline elements, environment in the R&D room and especially the target area has been studied with a G4beamline simulation in detail in this thesis. Also, a preliminary study to perform radiation tests at the radiation doses relevant for nuclear reactors is presented. M.S. - Master of Scienc

Metu-Defocusing Beamline : A 15-30 Mev Proton Irradiation Facility and Beam Measurement System

Middle East Technical University – Defocusing Beam Line (METU-DBL) project is an irradiation facility providing 15 MeV to 30 MeV kinetic energy protons for testing various high radiation level applications, ranging from Hi-Lumi LHC upgrade, space electronic components to nuclear material research. The project located inside the premises of the TAEA (Turkish Atomic Energy Agency) SANAEM (Saraykoy Nuclear Education and Research Center) close to Ankara, provides users a wide selectable flux menu (105–1010 p/cm2/s). The facility is now being commissioned and the facility will be providing a large test area (20 cm x 15 cm) for material, detector and electronics tests. The proton beam is monitored along the beamline using aluminum oxide screens and the flux and uniformity is measured using three detectors attached to the robotic system for cross- checks. A fiber scintillator detector scans the large irradiation area while small area diamond detector and Timepix3 detector are used for spot checks for calibration. Several samples can be radiated simultaneously inside the irradiation area and the robotic system provides 5 separate holders for samples which can be moved in or out, providing users flexibility for the desired fluence. This talk will first introduce METU- DBL as a radiation test facility, then discuss the radiation monitoring of the beam area and the radiation room, while highlighting how this facility can be used for future testing of materials for radiation tolerance