Prof H A Fried

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The kinetic power theorem for an electron beam that interacts solely with longitudinal electric fields was formulated by L. J. Chu (1). It has served to explore the conditions under which growing waves can be excited by interaction of a beam with an rf structure and has established an analogy between longitudinal beam amplifiers and linear passive networks.(More)
In the April 15, 1955, Quarterly Progress Report, it was shown that Pierce's model of a transverse field tube permits the definition of a small signal kinetic power flow in the beam of the same significance as the kinetic power flow defined by Chu for longitudinal beam tubes (1). The electromagnetic power extracted from the beam by a surrounding structure(More)