Ricerc@Sapienza

The Extreme Light Infrastructure - Nuclear Physics
Gamma Beam System (ELI-NP GBS) will be installed and
commissioned starting within the next year in Magurele,
Romania. It will generate gamma beam through Compton
back-scattering of a recirculated laser and a multi-bunch
electron beam, produced by a 720 MeV LINAC. In order
to obtain bunch by bunch position measurements, four cavity
beam position monitors (cBPM) near the two interaction
points are foreseen. Extensive tests on the cBPM readout

The Extreme Light Infrastructure – Nuclear Physics
Gamma Beam Source (ELI-NP GBS) facility will provide
an high intensity laser and a very intense gamma beam for
various experiments. The gamma beam is generated
through incoherent Compton back-scattering of a laser
light off a high brightness electron beam provided by a
720MeV warm LINAC. The electrons are organized in
compact trains with up to 32 bunches, each separated by
16ns. To optimize the laser-electron interaction and
therefore the generation of the gamma rays, one big