E-TYPE PHOTODEMODULATORS FOR COHERENT LIGHT SIGNALS.
Final technical rept.,
MICHIGAN UNIV ANN ARBOR ELECTRON PHYSICS LAB
Pagination or Media Count:
The theoretical studies are summarized and an experimental investigation is reported for an E-type traveling-wave phototube. The principal feature of such a device is the centrifugal electrostatic focusing of the electron beam. The theoretical study yields a small-signal power theorem, the types of waves propagating along a thin E-type beam, and a small-signal analysis of the traveling-wave phototube. An expression for the equivalent resistance of the device is derived, with numerical results given for the case of zero circuit loss, zero space charge, and synchronous beam velocity. For comparison, equivalent resistance values are given for O-type phototubes. The experimental investigation involved a phototube designed to operate at S-band. Design considerations and measurement techniques are discussed. Experimental curves for the equivalent resistance are presented and compared with the theoretical results. Author
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