Journal Article

PUBDB-2020-02867

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Photon statistics and signal to noise ratio for incoherent diffraction imaging

Trost, F. (Corresponding author)CFEL*DESY* ; Ayyer, K.CFEL*MPG*XFEL.EU*EMBL* ; Chapman, H. N.CFEL*DESY*

2020
IOP [London]

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Please use a persistent id in citations: doi:10.1088/1367-2630/aba85c  doi:10.3204/PUBDB-2020-02867

Abstract: Intensity interferometry is a well known method in astronomy. Recently, a related method called incoherent diffractive imaging (IDI) was proposed to apply intensity correlations of x-ray fluorescence radiation to determine the 3D arrangement of the emitting atoms in a sample. Here we discuss inherent sources of noise affecting IDI and derive a model to estimate the dependence of the signal to noise ratio (SNR) on the photon counts per pixel, the temporal coherence (or number of modes), and the shape of the imaged object. Simulations in two- and three-dimensions have been performed to validate the predictions of the model. We find that contrary to coherent imaging methods, higher intensities and higher detected counts do not always correspond to a larger SNR. Also, larger and more complex objects generally yield a poorer SNR despite the higher measured counts. The framework developed here should be a valuable guide to future experimental design.

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Contributing Institute(s):

1. CFEL-Coherent X-Ray Imaging (FS-CFEL-1)
2. FS-CFEL-1 (Group Leader: Henry Chapman) (CFEL-I)

Research Program(s):

1. 6215 - Soft Matter, Health and Life Sciences (POF3-621) (POF3-621)
2. DFG project 390715994 - EXC 2056: CUI: Advanced Imaging of Matter (390715994) (390715994)
3. DFG project 194651731 - EXC 1074: Hamburger Zentrum für ultraschnelle Beobachtung (CUI): Struktur, Dynamik und Kontrolle von Materie auf atomarer Skala (194651731) (194651731)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2020

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Trost, F. (Corresponding author)CFEL*DESY* ; Ayyer, K.CFEL*MPG*XFEL.EU*EMBL* ; Chapman, H.CFEL*DESY*
Photon statistics and signal to noise ratio for incoherent diffraction imaging
[10.3204/PUBDB-2020-01763]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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