Accession Number : AD0726124

Title :   Bremsstrahlung Model for Transition Radiation.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA INST OF TECH PASADENA ANTENNA LAB

Personal Author(s) : Seshadri,S. R. ; Papas,Charles H.

Report Date : APR 1971

Pagination or Media Count : 23

Abstract : The characteristics of transition radiation are investigated by modeling it as that due to a charged particle in uniform rectilinear motion changing its velocity abruptly to another constant value at any point of its trajectory in an unbounded homogeneous dielectric medium. When the particle velocities are much less than the phase velocity of electromagnetic waves, the equivalent source of transition radiation is found to be a Hertzian dipole situated on the particle trajectory at the location where the charge has a discontinuous change in its velocity and oriented along the direction of motion of the charge. Cerenkov wave is excited if the initial particle velocity is superluminal and is unaffected by the discontinuous change in the particle velocity. The characteristics of this Cerenkov wave are independent of the nature of the particle velocity after the transition. (Author)

Descriptors :   (*CERENKOV RADIATION, PARTICLE TRAJECTORIES), BREMSSTRAHLUNG, ELECTROMAGNETIC FIELDS, PARTIAL DIFFERENTIAL EQUATIONS, INTEGRAL TRANSFORMS, ASYMPTOTIC SERIES, ELECTRICAL PROPERTIES

Subject Categories : Nuclear Physics & Elementary Particle Physics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE