ORNL, Oak Ridge, Tennessee, USA
The Spallation Neutron Source Ring accumulates 0.6 μs long proton bunches of up to 1.6·1014 protons with a typical peak current of over 50 A during a 1 ms cycle. To qualify the beam, we perform different transverse profile measurements that can be done at full intensity. The electron beam scanner performs a non-invasive measurement of the transverse and longitudinal profiles of the beam in the ring. Electrons passing over and through the proton beam are deflected and projected on a fluorescent screen. Analysis of the projection yields the transverse profile while multi transverse profiles offset in time yield the longitudinal profile. Progress made with this system will be discussed as well as temperature measurements of the stripping foil and other transverse measurements.
