A Novel X-ray Diffractometer for the Florida Split Coil 25 Tesla Magnet

At National High Magnetic Field Laboratory (NHMFL), we are developing a unique X-ray diffractometer for the 25 Tesla Florida Split Coil Magnet for scattering experiments under extremely high static magnetic fields. The X-ray source is a sealed tube (copper or molybdenum anode), connected to the magnet by an evacuated beam tunnel. The detectors are either an image plate or a silicon drift detector, with the data acquisition system based on LabVIEW. Our preliminary experimental results showed that the performance of the detector electronics and the X-ray generator is reliable in the fringe magnetic fields produced at the highest field of 25 T. Using this diffractometer, we will make measurements on standard samples, such as LaB$_{\mathrm{6}}$, Al$_{\mathrm{2}}$O$_{\mathrm{3}}$ and Si, to calibrate the diffraction system. Magnetic samples, such as single crystal HoMnO$_{\mathrm{3}}$ and stainless steel 301 alloys will be measured subsequently. The addition of X-ray diffraction to the unique split coil magnet will significantly expand the NHMFL experimental capabilities. Therefore, external users will be able to probe spin -- lattice interactions at static magnetic fields up to 25T.