Mechanical Design of a High-Resolution X-ray Powder Diffractometer at the Advanced Photon Source

摘要

A novel high-resolution x-ray powder diffractometer has been designed and commissioned ,at the bending magnet beamline 11-BM at the Advanced Photon Source (APS), Argonne National Laboratory (ANL). This state-of-the-art instrument is designed to meet challenging mechanical and optical specifications for producing high-quality powder diffraction data with high throughput The 2600 mm (H) X 2100 mm (L) X 1700 mm (W) diffractometer consists of five subassemblies:a customized two-circle goniometer with a 3-D adjustable supporting base;a twelve-channel high-resolution crystal analyzer system with an array of precision x-ray slits;a manipulator system for a twelve scintillator x-ray detectors;4-D sample manipulator with cryo-cooling capability;a robot-based sample exchange automation system.The mechanical design of the diffractometer as well as the test results of its positioning performance are presented in this paper.