A method and apparatus for producing a monochromatic beam. A plurality of beams are generated from a polyenergetic source. The beams are then transmitted through a bent crystal, preferably a bent Laue crystal, having a non-cylindrical shape. A position of the bent crystal is rocked with respect to the polyenergetic source until a plurality of divergent monochromatic beams are emitted from the bent crystal.
This work was supported in part by U.S. Army Grant DAMD17-96-1-6143; U.S. Department of Energy Contract DE-AC02-76CH00016; and U.S. Department of Defense Advanced Research Projects Agency, ARPA Contract AOB227.