A CALORIMETER WITH A SECTIONIZED DETECTOR FOR MEASURING CHARACTERISTICS OF PULSE ELECTRON-BEAMS

A calorimeter with a sectionized collector consisting of 42 elements i s intended for measuring the energy content and energy density distrib ution over the cross section of a pulse electron beam with a pulse dur ation of several tens of nanoseconds. The cross-sectional area of each aluminum or graphite element decreases in the direction away from the surface, on which the beam is incident. An MMT-1-100 k Omega thermist or is attached to the opposite side of each element. The use of such a detector increases the accuracy of calorimetric measurements of beams with sharply nonuniform current densities. An electronic-relay device for recording the thermistors' readings for similar to 2 s and a meth od for certifying 42 measurement channels are described. The calorimet er is used for investigating characteristics of tubular pulse beams of electrons with an energy below 2 MeV and a current no greater than 15 0 kA, as wel as a pulse duration of similar to 40 ns with a variable a verage beam diameter from 145 to 180 mm, beam ''wall'' thickness of 3- 10 mm, and a beam energy content up to 12 kJ.