CHESS X-ray measurements 11/2006

In November, 2006 we had a one week beam time at CHESS in Cornell University. Participating in this run were: CHESS staff scientist Ken Finkelstein and GlueX collaborators Guangliang Yang, Richard Jones, and Franz Klein. We measured rocking curves for several diamond crystals there. Franz brought with him the target ladder from Hall B, so we had quite a rich variety of samples to examine.

• HallB-G50 : type IA natural diamond, said to be 53 microns thick, mounted on the Hall B target ladder. Experimenters from g8 call this diamond "good", hence the name G50.
• HallB-B50 : type IIA natural diamond, said to be 40 microns thick, mounted on the Hall B target ladder. Experimenters from g8 call this diamond "bad", hence the name B50.
• HallB-20 : type IB synthetic (HPHT) diamond, said to be 18 microns thick, mounted on the Hall B target ladder.
• twin-50 : type IA natural diamond, said to be 50 microns thick, thought to be a twin crystal, part of the Glasgow collection.
• badboy-50 : type IIA natural diamond, said to be 50 microns thick, thought to have a large rocking curve width, part of the Glasgow collection.

All data were archived at UConn. Some interesting results for the 20 micron crystal are shown below.

• Results for the 20 micron diamond