Fig. 10
From: Medium-energy particle experiments–ion mass analyzer (MEP-i) onboard ERG (Arase)
PH distributions for a 20-keV/q, b 40-keV/q, c 80-keV/q, and d 120-keV/q beams of H+ (m/q = 1), H2 + (m/q = 2), He+ (m/q = 4), N+ (m/q = 14), and N2 + (m/q = 28). The dashed lines indicate the threshold level