509th Composite Group

University of California

Berkeley Radiation Lab

 

Photo: P-387 (Receiver for Alpha Calutron)

(Photo courtesy of LBNL Image Library)

   

This is a schematic diagram of the receiver for the alpha calutron.  Uranium 235 collects in the small pocket between.  The calutron design settled on in 1942, called "alpha", provided for enrichment of natural uranium to about 15 percent U-235.  Extravagant effort went into designing powerful ion sources and aptly shaped, eventually parabolic collecting slots.  

 

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