High-sensitive remote diagnostics of the accelerated particles' beam cross section

A gauge for remote monitoring of the density distribution of an accelerated particle beam over a cross section is described. It is based on the analysis of spatial distribution of residual gas ionization products. With the transverse homogeneous electric field the released charges are transported through a narrow slot behind which they are analyzed. Then they are registered by the open electron-optical converter with a micro-channel-plate amplifier. The image of the beam distribution over the cross section from the electron-optical converter screen is read by a TV camera for representation on a monitor. The detector was tested on cyclotrons at IAE (Moscow), INP (Kiev), and INP (Prague) to show that the detectors are very useful devices for unconnected beam diagnostics at different accelerators.<>