From Event: SPIE Optical Engineering + Applications, 2017
Motivated by the Advanced Photon Source Upgrade (APS-U), a new hard X-ray microscope called “Velociprobe” has been recently designed and built for fast ptychographic imaging with high spatial resolution. We are addressing the challenges of high-resolution and fast scanning with novel hardware/stage designs, new positioner control designs, and new data acquisition strategies, including the use of high bandwidth interferometric measurements. The use of granite, air-bearing-supported stages provides the necessary long travel ranges for coarse motion to accommodate real samples and variable energy operation while remaining highly stable during fine scanning. Scanning the low-mass zone plate enables high-speed high-precision motion of the probe over the sample. Our primary goal is to use this instrument to demonstrate sub-10 nm spatial resolution ptychography over a 1-square-micron area in under 10 seconds. We have also designed the instrument to take advantage of the upgraded source when the APS-U is completed. This presentation will describe the unique designs and characteristics of this instrument, and some preliminary data obtained during the instrument commission.
Junjing Deng, Curt A. Preissner, Christian Roehrig, Michael Wojcik, Shane Sullivan, David J. Vine, Barry Lai, and Stefan Vogt, "The Velociprobe: A fast hard x-ray nanoprobe for ptychographic imaging (Conference Presentation)," Proc. SPIE 10389, X-Ray Nanoimaging: Instruments and Methods III, 103890M (Presented at SPIE Optical Engineering + Applications: August 08, 2017; Published: 19 September 2017); https://doi.org/10.1117/12.2276502.5581201819001.
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