We report on the test results obtained with a prototype beam profiler based
on a thin slit and a CsI scintillator, read out by means of a compact phot
omultiplier. Such a device has proven to be suitable to perform ion beam di
agnostics at low and very low intensities. In particular, our device is sui
table for being used in the energy and intensity ranges expected at the EXC
YT radioactive ion beam facility, that is currently under development at LN
S Catania. (C) 1999 Elsevier Science B.V. All rights reserved.