Abstract
The effect of dissipation on the instability caused by growing of the slow space charge wave of electron beam is studied. High level of dissipation leads to a new type of dissipative streaming instability. Its growth rate has a previously unknown, inverse proportional dependence on dissipation. The new dependence is a result of superposition of two factors, both of which lead to excitation of the beam wave with negative energy: increasing of beam current and dissipation. Basic parameters of the instability indicate that it can be an important additional factor upon design of high-power high-frequency devices based on relativistic e-beams.
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