Measurement by FIB on the ISS: Two Emissions of Solar Neutrons Detected?

Figure 5

A typical background neutron event. The neutrons enter from the preceding section of the ISS (small to large in the horizontal scale 𝑦 of the left side picture) and from the top to the bottom (small to large of the right side picture 𝑥 in horizontal axis). The incident neutrons are converted into protons inside the scintillator. The energy deposit in each bar is color-coded. At the termination point of the track, the Bragg peak can be recognized. The G_min and G_max correspond to the ADC channel 0 and 90. The linear ADC has a range of 256 channels and the dip and peak correspond to 11 (dark blue) and 22 (light blue) respectively induced by the minimum ionizing particles. Orange spot corresponds to about channel 70.