| Paper |
Title |
Page |
| MOPB05 |
Smith-Purcell Radiation with Negative-index Material |
20 |
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- D. Li, K. Imasaki
ILT, Suita, Osaka, Japan
- M.R. Asakawa
Kansai University, Osaka, Japan
- M. Hangyo, K. Takano
ILE Osaka, Suita, Japan
- S. Miyamoto
LASTI, Hyogo, Japan
- Y. Tsunawaki
OSU, Daito, Osaka, Japan
- Z. Yang
UESTC, Chengdu, Sichuan, People's Republic of China
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Smith-Purcell radiation from an electric line charge that moves, at constant speed, parallel to a grating made of metamaterial with negative index is analyzed. Through theoretical analysis and computations, we show that the Smith-Purcell radiation is stronger from a grating of negative-index material, than positive-index material and perfect conductor. Also, we found the radiation strongly depends on the values of permeability and permittivity.
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| MOPB06 |
Smith-Purcell Free Electron Laser with Bragg Reflector |
24 |
| |
- D. Li, K. Imasaki
ILT, Suita, Osaka, Japan
- M.R. Asakawa
Kansai University, Osaka, Japan
- M. Hangyo
ILE Osaka, Suita, Japan
- S. Miyamoto
LASTI, Hyogo, Japan
- Y. Tsunawaki
OSU, Daito, Osaka, Japan
- Z. Yang
UESTC, Chengdu, Sichuan, People's Republic of China
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Grating with Bragg reflectors for the Smith-Purcell free-electron laser is proposed to improve the reflection coefficient, resulting in enhancing the interaction of the surface wave with the electron beam and, consequently, relax the requirements to the electron beam. With the help of particle-in-cell simulations, it has been shown that, the usage of Bragg reflectors may improve the growth rate, shorten the time for the device to reach saturation and lower the start current for the operation of a Smith-Purcell free-electron laser.
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