Hands-on and beam loss criterion at SARAF SC linac

Beam loss criterion for beam dynamics simulation is derived from the dose rate level which will allow hands-on maintenance. In this short paper we define a new beam loss criterion for SARAF SC (Super Conducting) linac based on the hands-on maintenance criterion used successfully for maintenance of high energy high intensity proton linacs. According to the high intensity proton linacs facilities working experience, we suggest a realistic dose limit for the SARAF which will allow hands-on maintenance. At this approach the annual dose limit for design (define as 1/10 of the annual dose limit for worker, 2000 mrem), will be taken into account at the maintenance program of the linac. We also repeated the residual activity calculation along the SC linac with novel experimental cross sections. Based on this analysis we suggest that the beam loss criterion will vary along the SC linac to keep the dose rate below 10 mrem/h. In this new definition the beam loss criterion is around 200 nA/m in the MEBT and decreases to 1 nA/m at 40 MeV.