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

Figure 8

A candidate electron track. A photon enters from the top of the sensor (𝑦-𝑧 plane). An electron apparently deposited energy inside one vertical bar (where the red spot denotes a large deposit of energy) while running vertically, thus enabling the recording of a long thin track in the 𝑥-𝑧 plane. Since the ionization loss of electrons is smaller than that of protons, thin tracks are expected.