Speaker
Description
The nano-diffraction instrument was the first nanoprobe endstation of the NanoMAX beamline at MAX IV and has been in user operation since 2017 [1]. It is based on a diffraction-limited KB mirror system with a long working distance of 100 mm and delivers a highly coherent nano-focused beam down to 40-200 nm, depending on the photon energy [2,3]. The alignment of the KB mirrors is routinely verified and adjusted based on the ptychographic reconstruction of a lithographic test structure [3,4]. The sample alignment is facilitated by a two-circle goniometer, a set of custom-built, long-stroke XYZ positioners, and a high-load XYZ piezo scanner. The entire sample positioning stack is optimized to accommodate sample environments weighing of up to 1000 g. In-situ optical microscopes, providing both on-axis and top-view perspectives, that assist in pre-aligning samples within the X-ray focus. A pixel detector inside an evacuated flight tube measures the forward-scattered signal. A robotic arm allows for the flexible positioning of a state of the art pixel detector in 3D for coherent diffractive imaging or Bragg ptychography [5]. Wide-angle scattering experiments can utilize a large-area detector positioned near the sample. The fluorescence signal emitted by the samples is captured by an energy-dispersive detector. The instrument is frequently used for experiments involving samples environments such as nano-indenters [6], electro-chemistry cells, XBIC setups [7], heaters, high-pressure cells [8], or other user-supplied setups.
We will present its capabilities, recent instrument improvements and upgrades, current sample environments, and results of selected user experiments.
Keywords: Nanoprobe, Ptychography, Cohrent Diffractive Imaging, Nano-Diffraction, X-Ray Fluoresecnce.
References
[1] D. Carbone, et al., Journal of Synchrotron Radiation, 29 (2022), 876-887, doi: 10.1107/S1600577522001333
[2] U. Johansson, et al., Journal of Synchrotron Radiation, 28 (2021), 1935-1947, doi: 10.1107/S1600577521008213
[3] A. Björling, et al., Opt. Express 28, (2020), 5069-5076, doi: 10.1364/OE.386068
[4] M. Kahnt, et al., Opt. Express 30 (2022), 42308, doi: 10.1364/OE.470591
[5] L. Peng, et al. Light: Science & Applications 11 (2022) 73, doi: 10.1038/s41377-022-00758-z
[6] G. Lotze, et al., Journal of Synchrotron Radiation 31 (2024) 42-54, doi: 10.1107/S1600577523010093
[7] J. Keller, et al., Solar RRL 2301018 (2024) 1, doi: 10.1002/solr.202301018
[8] J. Cheng, et al., Matter and Radiation at Extremes 5 (2020) 038401, doi: 10.1063/5.0003288
| I plan to submit also conference proceedings | No |
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