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  ____       ___               _    _    __   _   
 |  _ \\    / _ \\      ___   | || | || | || | || 
 | |_| ||  / //\ \\    /   || | || | || | '--' || 
 | .  //  |  ___  ||  | [] || | \\_/ || | .--. || 
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 `-` --`  `-`   `-`     -|_||   `---`   `-`  `-`  
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Text this: A high-brightness large-diameter graphene coated point cathode field emission electron source