Innovative amplifiers for muon spectroscopy experiments at RAL

The high intensity pulsed muon beam of ISIS facility at Rutherford Appleton Laboratory (RAL, U.K.) allows to perform high precision muonic X-ray spectroscopy experiments. In particular, FAMU and CHNET-TANDEM projects at RAL are dedicated, respectively, to a precise measurement of the Zemach radius of the proton through the measure of the hyperfine splitting of the ground state of the muonic hydrogen atom and to the optimization of analytical methods based on the muonic atom spectroscopy for non-destructive elementary characterization of archaeological samples. Custom electronic boards dedicated to the detector amplification stages have been designed and prototypized to provide fast high resolution for both experiments. The main features and performance of these custom boards are described in details in this work.