Precise proton energy measurement in the CN Van der Graaff at LNL

by Dr Guido Martin Hernandez (CEADEN)

Tuesday 1 Jul 2014, 11:00 → 12:00 Europe/Rome

LAE meeting room (INFN-LNL)

The CN has an offset between the machine indication and the real energy of the beam of around tens of keV and varies from day to day. One of the key aspects to successfully perform BELINA and n-TOF experiment at CN, as well as others, is the precise knowledge of the proton beam energy and its  distribution.

To achieve this knowledge the well-known time of flight spectrometry is implemented. This technique is widely utilized in science and engineering to measure the kinetic energy of a moving object by measuring the time that the object employs traveling a known distance.

Taking advantage of the presence of a proton pulsed beam we measure the energy distribution of the CN proton beam. An energy resolution lower to one keV was achieved while the proton energy distribution was found to be dependent on the proton beam energy selected and the accelerator optics and it is strongly influenced by the parameters of the 3 MHz pulsing system.