Dear Richard, You have sent the e-mail below to Francesco De Carlo a few days ago. He has forwarded your e-mail to me because I am the scientist who has interest and capability to help you. Over the last few years, I have developed high-resolution x-ray topography capabiliy at the APS. We have studied a few different materials including diamonds. Specifically, we have studied the effect of etching for removing surface strain on high-pressured and high-temperature grown diamonds. We also have collaboration on investigating the crystalline defects for CVD grown diamonds. I believe that we have appropriate experties and instrumentational capabilities that could be useful to you for investigating the structural details of the diamond crystals. Currenlty, we are developing ccd-based quantative analysis methods to resolve the strain and lattice distortion with a spatial resoltuion down to about 1 micron. Thus, both qualitative and quantitative characterizations can be readily made. Since the APS is the User Facilities, there are specific guide-lines for applying for the beamtime needed for the research. I am quite eager to help you through the appropriate procedures neccessary for this. In addition, if you are interested in quick measurement outside of formal process, I would see if this can be done for one sample.. I am carbon-copying this e-mail to my postdoc, Yuncheng Zhong, who is developing the quantitative methods for analyzing the x-ray topographs. I am sure that he also would be interested in knowing more about your research. I propose we talk over the phone to find out our mutual interests and how this can be achieved. I will be available for most of Today and next week. So, I would appreciate your calling me to discuss the details. I am sending you some of the published x-ray topograph studies that were performed at our beamline. Sincerely, Yong Chu