@inproceedings{afb85de340df448bbfdbee164a56314f,
title = "Optimized illumination for high-throughput ptychography",
abstract = "As a scanning version of coherent diffraction imaging (CDI), X-ray ptychography has become a popular and very successful method for high-resolution quantitative imaging of extended specimens. The requirements of mostly coherent illumination and the scanning mechanism limit the throughput of ptychographic imaging. In this paper, we will introduce the methods we use at the Advanced Photon Source (APS) to achieve highthroughput ptychography by optimizing the parameters of the illumination beam. One work we have done is increasing the illumination flux by using a double-multilayer monochromator (DMM) optics with about 0.8% bandwidth. Compared with our double-crystal monochromator (DCM) optics with 0.01% bandwidth, this DMM optics provides around 20 times more flux. A multi-wavelength reconstruction method has been implemented to deal with the consequential degraded temporal coherence from such an illumination to ensure high-quality reconstruction. In the other work, we adopt a novel use of at-top focusing optics to generate a at-top beam with the diameter of about 1.5 μm on the focal plane. The better uniformity of the probe and the large beam size allow one to significantly increase the step size in ptychography scans and thereby the imaging efficiency.",
keywords = "Broad bandwidth, Coherent diffraction imaging, Flat-top zone plate, Ptychography",
author = "Yudong Yao and Junjing Deng and Klug, {Jeffrey A.} and Yi Jiang and Michael Wojcik and Youssef Nashed and Curt Preissner and Christian Roehrig and Zhonghou Cai and Oliver Cossairt and Stefan Vogt and Barry Lai",
note = "Funding Information: This research used resources of the Advanced Photon Source and the Center for Nanoscale Materials, U.S. Department of Energy (DOE) Office of Science User Facilities operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. This work is partially supported by the Office of the Director of National Intelligence (ODNI), Intelligence Advanced Research Projects Activity (IARPA). The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the ODNI, IARPA, or the U.S. Government. Publisher Copyright: {\textcopyright} 2019 SPIE.; X-Ray Nanoimaging: Instruments and Methods IV 2019 ; Conference date: 11-08-2019 Through 12-08-2019",
year = "2019",
doi = "10.1117/12.2530527",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Barry Lai and Andrea Somogyi",
booktitle = "X-Ray Nanoimaging",
}