Date of Award

Spring 1968

Document Type

Thesis - Restricted

Degree Name

Master of Science (MS)

Department

Electrical Engineering

First Advisor

Ishii, Thomas Koryn

Second Advisor

Szews, A. P.

Third Advisor

Wa, Sherman H.

Abstract

This thesis presents experimental and theoretical results which indicates that a reflex klystron oscillator can be used as an acceleration detection instrument where the shift in the oscillation frequency is a function of the applied acceleration . The principle of operation is one of mechanical tuning . The Acceleration causes a small change in the size of the resonant cavity which produces the frequency shift. This frequency shift was found to be linear with respect to t he acceleration input . The change in frequency was also found to be repeatable, controllable, and therefore predictable as required in this application.

In this test, a modified reflex klystron type 2K25 i\f8S used at an oscillation frequency of 9.3 GHz and a scale factor of 66 cm./sec.[squared] per MHz was obtained. A simple theory is given to explain the operation of the accelerometer model. The theory, through the use of an equivalent circuit, predicts that the output will be linear over an operating range of at least 300 MHz. Although the experimental test configuration was relatively simple, the results were very good and there was a general agreement between theoretical and experimental results . A comparison with present-day accelerometers indicates that the klystron accelerometer may be capable of replacing some of these 1n a particular application.

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