Research Progress of Small Radiation Dose Monitoring Instrument

We have developed a small integrated radiation dose detector suitable for small satellites. This detector was originally designed for the aviation orbit. The particles in the aviation orbit come from a variety of sources, mainly galactic cosmic rays and their respective secondary particles generated in the atmosphere and aircraft. Among them, the neutron dose component is as high as 30%. In addition, the aviation irradiation dose varies with the horizontal altitude and latitude. The radiation dose detector is composed of semiconductor silicon detector, signal processing module, signal acquisition module, field programmable gate array (FPGA), power supply circuit and so on. It can measure the components of neutron, X, gamma,, proton, meson, heavy ion and other particles. The response energy range is 60kev-100mev, and the dose rate range is 1.00nSv/h-1.00mSv/h. At present, the instrument has carried out simulated calibration, electronic calibration, proton calibration, neutron calibration and flight experiments of two voyages. The flight experiments monitors the absorbed dose and equivalent dose of the aircraft at different altitudes and latitudes from takeoff to landing. Later, we will conduct several balloon flight experiments. Because the detector can detect a variety of particles, with wide response range, small size and low power consumption, it can be transformed into cubesat. Furthermore, it can form a micro-satellite constellation to monitor space weather in real time.