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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 high-throughput 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 flat-top focusing optics to generate a flat-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.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
U.S. Department of National Intelligence - Intelligence Advanced Research Projects Activity (IARPA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1563147
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: 2019 SPIE X-Ray Nanoimaging: Instruments and Methods IV , 08/11/19 - 08/15/19, San Diego, CA, USA
Country of Publication:
United States
Language:
English
Subject:
Broad bandwidth; Coherent diffraction imaging; Flat-top zone plate; Ptychography

Citation Formats

Yao, Yudong, Deng, Junjing, Klug, Jeffrey A., Jiang, Yi, Wojcik, Michael, Nashed, Youssef, Preissner, Curt, Roehrig, Christian, Cai, Zhonghou, Cossairt, Oliver, Vogt, Stefan, and Lai, Barry. Optimized illumination for high-throughput ptychography. United States: N. p., 2019. Web. doi:10.1117/12.2530527.
Yao, Yudong, Deng, Junjing, Klug, Jeffrey A., Jiang, Yi, Wojcik, Michael, Nashed, Youssef, Preissner, Curt, Roehrig, Christian, Cai, Zhonghou, Cossairt, Oliver, Vogt, Stefan, & Lai, Barry. Optimized illumination for high-throughput ptychography. United States. doi:10.1117/12.2530527.
Yao, Yudong, Deng, Junjing, Klug, Jeffrey A., Jiang, Yi, Wojcik, Michael, Nashed, Youssef, Preissner, Curt, Roehrig, Christian, Cai, Zhonghou, Cossairt, Oliver, Vogt, Stefan, and Lai, Barry. Sun . "Optimized illumination for high-throughput ptychography". United States. doi:10.1117/12.2530527.
@article{osti_1563147,
title = {Optimized illumination for high-throughput ptychography},
author = {Yao, Yudong and Deng, Junjing and Klug, Jeffrey A. and Jiang, Yi and Wojcik, Michael and Nashed, Youssef and Preissner, Curt and Roehrig, Christian and Cai, Zhonghou and Cossairt, Oliver and Vogt, Stefan and Lai, Barry},
abstractNote = {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 high-throughput 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 flat-top focusing optics to generate a flat-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.},
doi = {10.1117/12.2530527},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {8}
}

Conference:
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