Cerenkov Radiation, Transition Radiation and Diffraction Transition Radiation from Periodic Bunches for a Finite Beam Path in Air.
Abstract
Cerenkov, transition and diffraction transition radiation generated diffraction patterns are analyzed in order to determine whether a functional angular dependence exists to differentiate between these radiations. Experimental evidence is presented demonstrating differences in the diffraction pattern after specific changes are made during the experiment to identify transition radiation and diffraction transition radiation effects. Upon comparison with theoretical plots of Cerenkov radiation patterns, all three radiation effects can be isolated. This is significant in that there are no absolute boundaries between these there radiations and furthermore, Cerenkov radiation merges into transition radiation for a finite path length. Additionally, improvements in noise reduction in data recording have been made which lend further support to the validity of the equation for the power in the diffraction pattern of Cerenkov radiation from periodic bunches for a finite path in air as derived by Neighbours and Buskirk. It is also proposed that postulated noise-generated fine structure in previous experiments at NPSAL is partly caused by inherent transition and diffraction transition radiation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1986
- Accession Number
- ADA174338
Entities
People
- Arthur J. O'grady
Organizations
- Naval Postgraduate School