First (calibration) experiment using proton beam from FRENA at SINP

This work presents the first calibration experiment of a 3 MV Tandetron accelerator, FRENA, performed in May 2022. The ${}^7$Li(p,n) reaction threshold was measured to calibrate the terminal voltage measuring device. A LiF target of thickness 175 $\mu$g/cm${}^2$ was used in the experiment. The measured threshold was 1872$\pm$2.7 keV, indicating 6$-$10 keV energy shift.