Abstract
The current-compensation factor fm of a high-current relativistic electron beam (REB) with an energy Ee = 1.1 MeV, a current Ib = 24 kA, and a pulse duration tp = 60 ns was investigated. The beam traveled in a metallic drift pipe filled with air at a pressure of 1 to 760 Torr. The dependence of the current compensation of the REB on the resistance of an external liner and the gas pressure was determined by two methods: using Rogowski loops placed around the transport channel or resistive back-current shunts inserted in the breaks of the drift pipe. It was ascertained that fm of the high-current REB slightly varied with the gas pressure and was virtually independent of the resistance of the external liner. It was shown that the current compensation could be correctly determined by measuring the total current with the Rogowski loops placed inside the drift pipe and not with resistive shunts.
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