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            ______    ______   __   __   __   _   
  ____     /_   _//  /_____//  \ \\/ // | || | || 
 |    \\    -| ||-   `____ `    \ ` //  | '--' || 
 | [] ||    _| ||_   /___//      | ||   | .--. || 
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 |_|`-`    `-----`   /_//        `-`'   `-`  `-`  
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發送短信 : Beam Dynamics Investigation for the Compact Seeded THz-FEL Amplifier