First test results for a residual gas beam profile monitor

A residual gas beam profile monitor (RG-BPM) has been designed to study the cooling process of an ion beam circulating in a storage ring where the residual gas has a very low pressure. In this case the residual gas ion rate is very low and a single ion counting technique is required to reconstruct the beam profile. The peculiar feature of this device is the read-out system that can lead to a sensitive improvement of the spatial resolution. The same device can work also in analog mode at higher residual gas pressure and, then, it can be used also for other kind of accelerators. The test of the RG-BPM on an ion beam from an electrostatic accelerator is here given. The preliminary test arrangement for the ion single counting mode is also presented