PAC09 - List of Authors (Alekhina, T.Yu.)

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Alekhina, T.Yu.

Paper	Title	Page
TH6REP037	Radiation of a Charge Crossing a Left-Handed Medium Boundary and Prospects for its Application to Beam Diagnostics	4030
	A.V. Tyukhtin, T.Yu. Alekhina, E.G. Doil'nitsina, S.N. Galyamin Saint-Petersburg State University, Saint-Petersburg
	Funding: Physical Faculty of St.Petersburg State University (14.10.08); SBIR DOE (DE-FG02-08ER85031) Radiation of a charge crossing the boundary between vacuum and left-handed medium is analyzed. The medium is characterized by permittivity and permeability with frequency dispersion of “plasmatic” type. Such properties can be realized in some modern metamaterials with a relatively simple structure. Both the case of unbounded medium and the case of circular waveguide are considered. Analytical expressions for field components are obtained and algorithm of their computation is developed. The main attention is given to the analysis of radiation in vacuum region. In particular, it is shown that two types of radiation can be generated in this region. One of them is an ordinary transition radiation having relatively large magnitude. Another type of radiation can be named the “Cherenkov-transition” radiation. Conditions of generating this type of radiation are obtained. This effect and some another properties of radiation can be used for diagnostics of beams. For example, the detector with two energy thresholds can be designed.

Paper

Title

Page

TH6REP037

Radiation of a Charge Crossing a Left-Handed Medium Boundary and Prospects for its Application to Beam Diagnostics

4030

A.V. Tyukhtin, T.Yu. Alekhina, E.G. Doil'nitsina, S.N. Galyamin
Saint-Petersburg State University, Saint-Petersburg

Funding: Physical Faculty of St.Petersburg State University (14.10.08); SBIR DOE (DE-FG02-08ER85031)

Radiation of a charge crossing the boundary between vacuum and left-handed medium is analyzed. The medium is characterized by permittivity and permeability with frequency dispersion of “plasmatic” type. Such properties can be realized in some modern metamaterials with a relatively simple structure. Both the case of unbounded medium and the case of circular waveguide are considered. Analytical expressions for field components are obtained and algorithm of their computation is developed. The main attention is given to the analysis of radiation in vacuum region. In particular, it is shown that two types of radiation can be generated in this region. One of them is an ordinary transition radiation having relatively large magnitude. Another type of radiation can be named the “Cherenkov-transition” radiation. Conditions of generating this type of radiation are obtained. This effect and some another properties of radiation can be used for diagnostics of beams. For example, the detector with two energy thresholds can be designed.