Variable q-range x-ray scattering chamber for chemical and materials science at the Advanced Photon Source

17th Pan-American Synchrotron Radiation Instrumentation Conference

Schmidt, O.^1 ; Debartolo, J.^2 ; Kurtz, C.^2 ; Lee, B.^2 ; Seifert, S.^2 ; Winans, R.^2 ; Zuo, X.^2

Engineering Support Division, Argonne National Laboratory, Argonne, IL, United States^1

X-Ray Science Division, Argonne National Laboratory, Argonne, IL, United States^2

关键词: Advanced photon source;    Direct X-ray;    Fully automated;    Ray trajectories;    Sample-to-detector distance;    Vacuum chambers;    Vacuum environment;    X-ray transmission;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/493/1/012010/pdf
DOI  :  10.1088/1742-6596/493/1/012010

来源: IOP

【 摘 要 】

We present here the design of a novel variable q-range x-ray scattering instrument recently installed at Sector 12 of the Advanced Photon Source. This device provides automated, computer-controlled q-range changes for x-ray scattering experiments by varying the sample-to-detector distance within a large vacuum chamber. Eliminating the need to vent the system when changing camera lengths allows for quick and efficient change-overs between experimental setups. The detector cannot operate in a vacuum environment; therefore it is housed within an air chamber open to atmospheric pressure. A large carbon window isolates the detector from vacuum while allowing high x-ray transmission. An array of motorized beam stops mounted directly upstream of the window protects the detector from the direct x-ray beam for various types of scattering experiments. A smaller detector protrudes into the lower front section for simultaneous wide-angle x-ray scattering data collection. A fully automated support structure aligns the vacuum chamber to the x-ray trajectory.