أرسل هذا في رسالة قصيرة: A new design and computer simulation of a 5-electrode ion extraction/focusing system

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