Ptycho-Tomography
ALS User's Meeting, Lawrence Berkeley National Laboratory, Berkeley CA, October 3-4, 2018.
Buillding 30- Room: 206 ( Berkeley Lab site map)
Huibin Chang [1], Bjoern Enders[2], Pablo Enfedaque[1], Hari Krishnan[1], Stefano Marchesini [1], David Shapiro [3]
[1] CAMERA, Computational Research Division, [2] STROBE/UC Berkeley, [3] Advanced Light Source
ABSTRACT
Ptychography has enabled in recent years nanometer resolution, macroscopic field of view, and the capability to retrieve chemical, orbital, electronic, or magnetic contrast by reconstruction of both the phase (refractive index) and attenuation coefficients of a sample. The ptycho-tomography reconstruction problem is in principle similar to two dimensional ptychography. In practice, nanoscale imaging and three-dimensional tomographic reconstruction can be challenging because sample drifts are almost inevitable at high resolution, the phase of the tomographic projection may be wrapped around, measurements may have outliers, a fluctuating background, or may be restricted to a limited angular range of sample rotations. Several groups, including other DOE light sources, have developed new solutions to these practical problems. This workshop will serve to strengthen collaborations among the synchrotron x-ray nano-imaging community and offer a forum to discuss practical solutions for routine user operations.
Wednesday (workshop) Oct 3rd
Chair: Stefano Marchesini, CAMERA, Lawrence Berkeley Lab.
8:30-8:40 Welcome and Introductions, Stefano Marchesini, CAMERA, CRD-LBL)
8:40-9:10 Three-dimensional localization of nanoscale battery reactions, Young-Sang Yu (ALS, LBL)
9:10-9:30 "Nanosurveyor 2: The Next Generation Operando Ptychography Microscope at the ALS", Kasra Nowrouzi (ALS, LBL)
9:30-10:00 "New algorithm for blind ptychography and applications in partial coherence analysis and background removal", Huibin Chang, (CAMERA, LBL)
10:00-10:20 Break
Chair: Bjoern Enders, STROBE, UC Berkeley.
10:30-11:00 "Single-step 3D imaging framework for optical and X-ray phase tomography" Michael Chen (EECS/UC Berkeley)
11:00-11:30 "High-speed 3D imaging with ptychography", Doga Gursoy (APS, Argonne National Lab)
11:30-12:00 Dula Parkinson (ALS, LBL)
Group Photo
12:00-1:30 Lunch
Chair: David Shapiro, ALS, Lawrence Berkeley Lab.
1:30-2:00 "Atomic resolution phase contrast imaging in Transmission Electron Microscopy in Two and Three dimensions", Colin Optus (NCEM, Lawrence Berkeley Lab)
2:00-2:30 “Acceleration of Multi-mode X-ray Ptychography Reconstruction”, Leo Fang (Brookhaven National Lab)
2:30-3:00 "Ptychotomography at Diamond", Aaron Parson (Diamond Light Source, UK).
3:00-3:20 Break
Chair: Pablo Enfedaque, CAMERA, Lawrence Berkeley Lab
3:30-4:00 “CDI development at CSX”, Wen Hu (NSLSII- Brookhaven National Lab)
4:00:4:30 "Tomocam" Dinesh Kumar (CRD, Lawrence Berkeley Lab.),
4:30-5:00 Discussion: Benchmarks, databanks, formats, workflows, Ptycho-Developer workshop.
Thursday (tutorial) Oct 4th
9:00 - 10:00 Pablo Enfedaque: SHARP hands-on tutorial. Jupiter notebook
10:00-10:20 Break
10:20-10:45 Pablo Enfedaque: SHARP hands-on tutorial.
10:45-11:15 Streaming overview and demo, Hari Krishnan, Bjoern Enders
11:20 - 11:45 Dinesh Kumar, Tomocam (demo and overview) (30 min)
12:00-13:30 (Lunch break )
1:30-2:00 Tour around the beamline
