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P. ZOBDEH1,* , A. H. ESMAILIAN1, P. ABAD1
During the propagation of an electron bunch through the discontinuity of the (Coulomb) self-fields for the sharp boundary with different dielectric constant, a surface current of background electrons is generated, which in return emits transition radiation. In this study a comparison for temporal field profile of THZ pulse has been investigated for different quasimonoenergetic (momentum) distribution. Our calculation shows a rather well THZ signal for higher pick quasimonoenergetic distribution but according to experimental results, most electrons bunches follow the Boltzmann energy distribution. In our comparison, for distributions consisting quasi- monoenergetic electron, we have shown that the optimum THZ coherent radiation will occur; furthermore in smaller emission (or observation) angle it would be considerable..
Field profile, Momentum, Coherent radiation, Terahertz, Electron acceleration, Dielectric constant.
P. ZOBDEH, A. H. ESMAILIAN, P. ABAD, Effect of plasma-vacuum boundary for coherent transition radiation, Optoelectronics and Advanced Materials - Rapid Communications, 8, 9-10, September-October 2014, pp.840-844 (2014).
Submitted at: June 28, 2014
Accepted at: Sept. 11, 2014
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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