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Stopped-flow mixer for Time-Resolved SAXSA fast stopped-flow mixer is available at BL4-2 for Time-Resolved (TR) solution SAXS experiment. Our high frame rate pixel array detector (Pilatus 300K) and high X-ray flux multilayer monochromator (Mo/B4C multilayer) can be combined in order to achieve fast time-resolution up to 5msec. Our SasTool program is used for reducing the 2D detector images and produces buffer subtracted Intensity vs. q data for each time point of the TR-SAXS measurement. A customized sample injector has been developed to reduce the required sample volume to a minimum of 30ul per shot (standard is currently 50-100ul) eliminating the sample consuming priming of the lines before the measurements. An automatic wash cycle for the sample cell (capillary) is employed after every single shot to ensure that the capillary is clean and no residues remain in the cell from the previous measurement. Main features: Currently the TR-SAXS experiments require a large investment of time from the BL4-2 staff. If you wish to use the TR-SAXS set up or have any question, please contact BL4-2 staff well in advance of submitting beam time request.
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