We demonstrated the availability of high-quality synthetic diamonds suitable for use as x-ray radiators in the GlueX experiment. Of our six samples, one (stone 1482A, slice 1) was well within the design specifications for GlueX.
We also discovered that examining the Bragg peaks of candidate radiators is completely necessary. Although x-ray topographs give some information about the crystals, they were not a good predictor of the width of the Bragg peak. The technique of examining Bragg peaks with x-ray scattering, however, proved sufficient to distinguish the good crystals from the bad ones.
In collaboration with industry and the University of Glasgow, we expect to be able to provide suitable diamond radiators for the GlueX expeiment -- nearly perfect diamonds.
