ABOUT

The overarching goal of the Advanced Imaging and Data Analysis (AIDA) theme is the formation of a sustainable, long-term funded Nordic research programme and the establishment of a physical hub and competence platform that can continue developing imaging techniques for the future. In this way, we will establish a network for fostering advanced imaging experts through building excellence and innovation in both research and education.

The Theme builds upon the unique expertise gained in two previous LINXS themes (Imaging and Northern Lights on Food (NLF)) and aims to promote the continued advancement and refinement of both sample preparation and instrumentation, fostering development of scientific and innovation environments to enable cutting-edge deep technology and learning across science areas. This integrated approach of method and science areas will create a long-term benefit to the overall user community both with a continuous stream of new students and new groups, as well as building on the people that have already taken their first steps on the imaging path.

HAPPENING IN THEME

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CORE GROUP

WORKING GROUPS FOR AIDA

AIDA working group 1

Spectral Nano-imaging

In this working group, the chemical speciation takes centre stage in combination with ultimate resolution methods in chemical imaging. This means, for instance, identifying elements with X-ray Fluorescence, but also disentangling different chemical species of the same element with Scanning Transmission X- ray Microscopy and complementary IR-microscopies. Mostly conducted in 2D, the 3rd dimension is formed by the spectral component. The big advantage is that these techniques require no labelling and instead purely work with the composition or chemistry inherent to the sample, which is therefore relevant for a wide variety of scientific fields. Over the past five years, nano-imaging techniques have come to fruition at MAX IV, with the addition of new operational beamlines and end-stations, and now the time is right for e.g., the development of more streamlined data analysis approaches and assistance with sample preparation for experiments. A separate aim is to reach out to experts in laboratory-based, high-resolution imaging techniques, including optical (fluorescence) methods and spatial proteomics as well as electron-based methods such as TEM and STM while bridging to working group 2. This integration expands the scope of synchrotron experiments, thus providing a comprehensive nano-imaging toolkit.

AIDA WORKING GROUP 2

Micro-tomographic Imaging

Phase-contrast micro-computed tomography is an imaging modality that has evolved rapidly in the past few decades. The method exploits the wave-like behaviour of x-rays and neutrons, providing images with superior contrast in comparison to standard attenuation-based imaging. Due to the coherent properties of synchrotron radiation, phase-contrast imaging has been implemented at all synchrotron imaging beamlines, but even with neutron imaging it is possible to obtain phase-contrast images by use of optical gratings to produce beam interference. In these grating interferometers, it is even possible to extract so-called dark-field images based on the scattering in the sample. Such grating interferometers are even implemented at laboratory x-ray micro-tomography setups, along with propagation-based phase-contrast imaging.

The method experts in WG2 of the AIDA theme work with micro-tomographic imaging at synchrotrons, at neutron facilities, at free-electron laser facilities, and at laboratory-based x-ray sources both in academia and industry. Networking activities internally in the WG2 will provide cross fertilization for method optimization at different instruments and provide a strong basis of competence for the Advanced Study Groups.

AIDA WORKING GROUP 3

Advanced image processing

 

AIDA working group 4:

Coherent imaging methods

This working group is a fundamental layer between the acqiusition of raw data and scientific interpretation, dealing with specific data-oriented goals while facing a cross-disciplinary challenge. Besides focused activities inside the working group to advance the use of e.g. machine learning, VR and AR for imaging methods, cross-working group initiatives, such as hackathons and visualization-themed workshops are also foreseen, organized around the central themes provided by the Advanced Study Groups.

The primary emphasis in this working group will be on innovative approaches for extracting multiscale information from X-ray/neutron imaging data, visualizing results in an comprehensive way and delivering this whole process as a user-friendly environment. Additionally, we aim to foster collaboration among Imaging method users to share their expertise to educate and mentor the next generation of scientists.

Coherent X-ray imaging (CXI) encompasses different methods that all produce ultra-sharp, high-resolution images of the microscopic world, but without relying on the size of the focal spot to set the resolution. Instead, they use a property of advanced light sources: the highly organized "coherent" X-ray beams, to illuminate a sample. The scattered or diffracted light is recorded with a 2D camera and powerful computer algorithms are then used to reconstruct the final 2D or 3D images. Different techniques (ptychography, (Bragg)-coherent diffraction imaging (B-CDI), holography, etc.) cater for different kinds of samples and properties, such that they can be used across diverse scientific fields, for instance: at free electron lasers it captures the structures of delicate biomolecules and viruses before they can be destroyed by the intense pulses, whereas the microscopic stress & strain, or magnetic domains of quantum materials are tackled at synchrotrons. This Working Group works on events to inform people about these techniques, spread their use into new areas, as well as training and development in data analysis pipelines, and following new and upcoming methods, like multi-beam ptychography.

 

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