Analytic Approximation of Energy Resolution in Cascaded Gaseous Detectors

Figure 4

Example of a 5.9 keV peak in the detector, in argon-based gas mixture. The GEM effective gain is different in the two cases, 1.8 for (a) and 7 for (b). The main peak, amplified by the GEM, is marked as (M1), whereas the escape peak (E1) is halfway down. The conversion below the GEM results in the main peak (M2) at lower amplitude, with the corresponding escape peak (E2).

(a)

(b)