Fig. 3.


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Averaged Frisch Grid Ionization Chamber (DFGIC) anode signal traces from a detector test at CERN N_TOF EAR2. The directly measured detector current (without using a preamplifier) is depicted as black hatched line. It contains the gamma-flash superimposed with neutron-induced background. The γ-flash starts at t = 3 μs. The charge-sensitive preamplifier has a short decay shaping time of 3 μs. The preamplifier signals are shown in blue with two different gate lengths (1 μs and 2 μs) for gamma-flash, for gating off the signals by the switch. The 1 μs gated off preamplifier signal is saturated for about 15 μs. The 2 μs gated off preamplifier signal (hatched area) has no more saturation. (Figure courtesy S. Urlass, PhD thesis TU Dresden, 2022).

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