METU-DBL: a cost effective proton irradiation facility

Abstract The Middle East Technical University Defocusing Beamline (METU-DBL) is designed to deliver protons with selectable kinetic energies between 15–30 MeV, and proton flux 10 6 –10 protons/cm 2 /s, on a maximum 21.55 15.40 cm target region beam uniformity within ±6%, in accordance the ESA ESCC No. 25100 specification for single event effects (SEEs) tests low energy range. achieved high fluences, allow users test space-grade materials; electronic circuits, ASICs, FPGAs, optical lenses, structural elements, coating layers LEO, GEO, interplanetary missions. total received dose Device-Under-Test (DUT) from secondary particles created during proton-material interactions at first collimator dump never exceed 0.1% of primary protons. METU-DBL equiped several measurement stations services user teams. A station rotating drum that can hold multiple samples has been constructed next which provides neutrons transmission experiments. At region, robotic table located, mechanical electrical mounting points allows be tested row. modular vacuum box also attached any may require environment. Power rails provide various outputs DUT. For data acquisition, high-speed networking industrial PC are available station. design control software enables integrate optimize acquisition controlling properties measured diamond, Timepix3, fiber scintillator detectors mounted table. With diamond Timepix3 detectors, measurements taken five different (center four corners) area measure ensure it uniform across full area. Fiber scintillators both axes (X Y) scan cross-check profile's uniformity. Secondary doses irradiation by Geiger-Müller tube sensitive electrons gammas above 0.1 MeV neutron detector located entrance R&D room. room cools down relatively fast after (<1 hour). Accurate linear deposition rates absorbed calculated using MCNP6, FLUKA Geant4 Monte Carlo simulations. Alanine dosimetry calibrated against these simulations used estimate sample.