Magnetic induction monitor measurements of beam spatial characteristics in technological electron linear accelerators

A high-current two-section pulsed electron linear accelerator (ELA) "EPOS" has been in successful operation at "Accelerator" R&D Production Establishment, NSC KIPT, for a few years. Its main parameters are the current pulse length -4 μs, the pulse current 0.4 to 1 A, the pulse recurrence rate -150 Hz, the electron energy - up to 30 MeV. To provide a safe beam guiding, four-winding magnetic induction monitors were devised, making possible measurements of the position of the beam current center relative to the accelerator axis with an error of ±0.5 mm at the input and output of the second accelerating section. At present, the "Accelerator" specialists have developed a compact two-section ELA "KUT-20", at the output of which a similar magnetic induction monitor is installed. Below, we present the results of bench calibration of the monitor as well as the experimental results of measuring-channel operation at the "EPOS" accelerator. The possibility of determining the second moment, which characterizes the difference of the beam cross section from its axially symmetric section, is demonstrated