Pioli, S. Alesini, D. Cardelli, F. Gallo, A. Palmer, D.T. Palumbo, L. Piersanti, L. JACoW Geneva, Switzerland 978-3-95450-182-3 10.18429/JACoW-IPAC2017-TUPIK057 English 1822-1823 TUPIK057 gun vacuum operation real-time software Contribution to a conference proceedings 2017 2017-05 http://dx.doi.org/10.18429/JACoW-IPAC2017-TUPIK057 http://jacow.org/ipac2017/papers/tupik057.pdf The new Gamma Beam System (GBS), within the ELI-NP project, under installation in Magurele (RO) by INFN, as part of EuroGammas consortium, can provide gamma rays that open new possibilities for nuclear photonics and nuclear physics. ELI-GBS gamma rays are produced by Compton back-scattering to get monochromaticity (0,1% bandwidth), high flux (10¹³ photon/s the highest in the world), tunable directions and energies up to 19 MeV. Such gamma beam is obtained when a high-intensity laser collides a high-brightness electronbeam with energies up to 720 MeV. The RF-Gun, made with the novel clamping gasket technique, working in '-mode at 100 Hz with a max. RF input of 16 MW, RF peak field of 120 MV/m and filling time of 420 ns was fully tested and conditioned few month ago at ELSA. This paper will describe the real-time fast-interlock system based on waveform mask technique used during RF Gun conditioning in order to monitor on-line reflected RF signals for a faster pulse-to-pulse detection of breakdowns and to ensure the safety of Gun and modulator tripping such devices before next RF pulse.