Preprint

PUBDB-2024-05719

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Parallax in angular sensitive powder diffraction tomography

Modregger, P. (Corresponding author)Extern*DESY* ; Khaliq, A.Extern*DESY* ; Wittwer, F.XFEL.EU*DESY*

2024

This record in other databases:

Report No.: arXiv:2409.00157

Abstract: While a few methods for the determination of depth-resolved strain distributions each with inherent limitations are available, tomographic reconstruction has been applied to this problem in only a limited sense. One of the challenges was the potential impact of geometric parallax, which constitutes a non-negligible lateral offset of diffraction information arising from different sample depths at the detector. Here, the effect of parallax was investigated and two main results have emerged. First, the impact of parallax was found to be additive to other offset contributions, which implies a straightforward correction. Second, for tomographic scans utilizing a full 360{\deg} rotation parallax has been found to have no impact on reconstructions of angular information.

---

Contributing Institute(s):

1. FS-PETRA (FS-PETRA)
2. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: I-20231255 (I-20231255) (I-20231255)

Experiment(s):

1. PETRA Beamline P06 (PETRA III)
2. PETRA Beamline P21.2 (PETRA III)

Appears in the scientific report 2024

---