BL4-3

Beam line 4-3 is a wiggler side-station dedicated for x-ray absorption spectroscopy and EXAFS measurements on biological, environmental, catalysis, and materials systems. This station enables tender x-ray measurement (S K-edge and up, i.e. 2.4-5 keV) in addition to hard x-rays (up to 10 keV). Separate in-hutch experimental setups are required for the two different energy ranges. In the tender x-ray energy range, the station is setup with a He flight path from the beam line optics to the sample to avoid absorption by air. The beam is collimated and unfocused to allow for high energy-resolution measurements on homogenous samples. BL4-3 is equipped with a 7-element solid-state silicon drift detector in addition to ionization chambers and PIPS/Lytle detectors. A LHe cryostream allows for low-temperature measurements (T ~100 K). A motorized sample holder stage allows sequential measurement on multiple samples, which can be queued in the data collection software. There is an in-hutch gas manifold for in-situ catalysis with mass-flow control and reactor cells, and a potentiostat is available for operando measurements on battery cells.

Source —

20-pole, 2-Tesla wiggler side station, ≤ 0.75 mrad acceptance