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BL-10C at the Photon Factory is one of the world’s oldest small-angle X-ray scattering beamlines. In Spring 2014, the original beamline was scrapped and rebuilt as a beamline equipped with new optical components and an experimental system. Two detectors, PILATUS3 2M and PILATUS3 200K (DECTRIS), were installed for SAXS and WAXS measurements, respectively. Additionally, new devices for sample analysis such as a sample changer, a heating/cooling stage, and a HPLC (High Performance Liquid Chromatography) for SEC-SAXS were installed. Moreover, the control system for optical tuning and measurements at the beamline was overhauled, improving ease of operations via several automatic processes. Herein details of the new BL-10C are described. [ABSTRACT FROM AUTHOR]

An integrated controlling system and a unified database for high throughput protein crystallography experiments have been developed. Main features of protein crystallography experiments (purification, crystallization, crystal harvesting, data collection, data processing) were integrated into the software under development. All information necessary to perform protein crystallography experiments is stored (except raw X-ray data that are stored in a central data server) in a MySQL relational database. The database contains four mutually linked hierarchical trees describing protein crystals, data collection of protein crystal and experimental data processing. A database editor was designed and developed. The editor supports basic database functions to view, create, modify and delete user records in the database. Two search engines were realized: direct search of necessary information in the database and object oriented search. The system is based on TCP/IP secure UNIX sockets with four predefined sending and receiving behaviors, which support communications between all connected servers and clients with remote control functions (creating and modifying data for experimental conditions, data acquisition, viewing experimental data, and performing data processing). Two secure login schemes were designed and developed: a direct method (using the developed Linux clients with secure connection) and an indirect method (using the secure SSL connection using secure X11 support from any operating system with X-terminal and SSH support). A part of the system has been implemented on a new MAD beam line, NW12, at the Photon Factory Advanced Ring for general user experiments. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]

The spin relaxation process of A-band exciton in GaN is observed for the first time, to our knowledge, by spin dependent pump and probe reflectance measurement with sub-picosecond’s time resolution. The spin relaxation times at 150–225 K are measured to be 0.47–0.25 ps. These are at least one order of magnitude shorter than those of the other III–V compound semiconductors. The spin relaxation time, τs, is found to be proportional to T-1.4, where T is the temperature. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]