Text this: Coherent transition radiation from short electron bunches

 _    _     ______    _____     _____             
| || | ||  /_   _//  / ____||  |  ___||   ____    
| || | ||   -| ||-  / //---`'  | ||__    |    \\  
| \\_/ ||   _| ||_  \ \\___    | ||__    | [] ||  
 \____//   /_____//  \_____||  |_____||  |  __//  
  `---`    `-----`    `----`   `-----`   |_|`-`   
                                         `-`