# ''warping'' -- This is increasingly a problem as diamond thickness is reduced. Whole-crystal rocking curve broadening on the order of several mrad (compare with GlueX requirement of 20 μrad RMS) were seen in all 3 crystals less than 20 microns thick that were examined at CHESS. Two of these had never been exposed to an electron beam, so the warping cannot be attributed to radiation damage. A technique must be found to thin diamonds down to 20 microns that does not result in a free-standing crystal that is this badly warped, or else a mounting technique must be found which can hold the crystal flat once it has been thinned to 20 microns. | # ''warping'' -- This is increasingly a problem as diamond thickness is reduced. Whole-crystal rocking curve broadening on the order of several mrad (compare with GlueX requirement of 20 μrad RMS) were seen in all 3 crystals less than 20 microns thick that were examined at CHESS. Two of these had never been exposed to an electron beam, so the warping cannot be attributed to radiation damage. A technique must be found to thin diamonds down to 20 microns that does not result in a free-standing crystal that is this badly warped, or else a mounting technique must be found which can hold the crystal flat once it has been thinned to 20 microns. |