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

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Text this: Ion beam emittance measurement based on transformation matrix theory