Contains reports on work completed.Joint Services Electronics Programs (U.S. Army, U.S. Navy, and U.S. Air Force) under Contract DA 28-043-AMC-02536(E

Strandberg, Malcom W. P.

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II. MICROWAVE SPECTROSCOPYAcademic and Research StaffProf. M. W. P. Strandberg J. G. IngersollDr. S. R. Reznek J. D. KiersteadGraduate StudentsJ. B. Barton J. U. Free G. C. RappeL. R. Fox R. M. Langdon, Jr. B. N. YungM. K. MaulUndergraduate StudentsC. B. FriedbergS. R. KutnerM. J. MarkovitzA. WORK COMPLETED1. MICROWAVE MAGNETORESISTANCE MEASUREMENTSThis work has been completed by Charles B. Friedberg and submitted as a thesisto the Department of Physics, M. I. T. , May 1968, in partial fulfillment of the require-ments for the degree of Bachelor of Science. A summary of the thesis research follows.The magnetoresistance of a conducting solid is measured at high frequencies throughthe techniques of microwave spectroscopy. The measurement is based on the detectionof electromagnetic power absorbed by conduction electrons under the conditions imposedby a resonant cavity and an external magnetic field. The magnetic field dependence ofthis power absorption is calculated and verified experimentally within one order of mag-nitude for a thin copper film. The method that has been developed has potential applica-tion to the problem of detecting electronic conductivity in organic substances, particu-larly in certain bio-molecules that are important in life processes.M. W. P. Strandberg2. ELECTRONIC CONTRIBUTION TO ULTRASONIC ATTENUATIONIN A METAL FILMThis work has been completed by Morris J. Markovitz and submitted as a thesis tothe Department of Physics, M. I. T. , May 1968, in partial fulfillment of the requirementsfor the degree of Bachelor of Science. A summary of the thesis research follows.An experiment designed to measure the electronic contribution to the ultrasonicacoustic attenuation coefficient in a metal is described. Although the point at whichThis work was supported by the Joint Services Electronics Programs (U. S. Army,U. S. Navy, and U. S. Air Force) under Contract DA 28-043-AMC-02536(E).QPR No. 90(II. MICROWAVE SPECTROSCOPY)final results would be obtained was not reached, a complete description of what wasdone, and what further results should have been achieved, is presented. It was neces-sary to design and build a resonant cavity. Until that time, useful (but incomplete)experimentation had been performed with another cavity. The new cavity has now beenbuilt, but further refinements are needed before it can be used.Other possible experiments that may be performed with approximately the sameexperimental procedure are mentioned.M. W. P. StrandbergQPR No. 90

Microwave Spectroscopy

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Microwave Spectroscopy

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