Text this: Coherent transition radiation from short electron bunches

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