Form factor effects on microwave Cerenkov radiation
Turner, Edward R.
Neighbours, John R.
Maruyama, Xavier K.
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The effects of the electron bunch charge distribution on the production of microwave Cerenkov radiation in air are investigated. The representation of this distribution is presented in terms of a function called the form factor. Theory is developed which uses two dimensionless quantities to study the form factor effects. These are the emission length to wavelength ratio and the bunch length to wavelength ratio. A prediction is made for conditions which allows a concentration of radiation ninety degrees to the beam. Results are reported of experiments which were performed to measure the effects of the form factor using parameters available at the Naval Postgraduate School's linear accelerator. Findings from these experiments along with suggestions for further research are included. Keywords include: Microwave Cerenkov Radiation; and Stimulated Cerenkov Radiation
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