# High-Speed X-Ray Imager ‘Hayaka’ and Its Application for Quick Imaging XAFS and in Coquendo 4DCT Observation

## TL;DR

A high-speed X-ray camera called 'Hayaka' was developed to capture ultra-fast structural and chemical changes, enabling real-time 3D imaging of processes like noodle boiling.

## Contribution

The development of a lens-coupled X-ray camera with 1 μs exposure time and 5000 fps frame rate for high-speed XAFS and 4DCT.

## Key findings

- The 'Hayaka' camera achieved a spatial resolution of 77 μm with a 10 μs exposure time.
- Quick XAFS near the Cu K-edge was completed in 0.5 seconds using high-speed energy scanning.
- In situ 4DCT of noodle boiling was performed with 0.5 s time resolution over 150 s.

## Abstract

What are the main findings?
Developed a lens-coupled high-speed X-ray camera, “Hayaka,” capable of high-resolution imaging with a 1 μs minimum exposure time and a 5000 fps maximum frame rate.Demonstrated high-speed energy scanning for QXAFS near the Cu K-edge in 0.5 s and achieved in situ 4D-CT observation of the somen noodle boiling process with a 0.5 s time resolution.

Developed a lens-coupled high-speed X-ray camera, “Hayaka,” capable of high-resolution imaging with a 1 μs minimum exposure time and a 5000 fps maximum frame rate.

Demonstrated high-speed energy scanning for QXAFS near the Cu K-edge in 0.5 s and achieved in situ 4D-CT observation of the somen noodle boiling process with a 0.5 s time resolution.

What are the implications of the main findings?
The “Hayaka” camera system enables the observation of ultra-fast structural changes and chemical state transitions.This high-speed 4D-CT technique opens new possibilities for real-time, three-dimensional analysis of complex dynamic processes in food science and materials engineering.

The “Hayaka” camera system enables the observation of ultra-fast structural changes and chemical state transitions.

This high-speed 4D-CT technique opens new possibilities for real-time, three-dimensional analysis of complex dynamic processes in food science and materials engineering.

A lens-coupled high-speed X-ray camera, “Hayaka”, was developed for quick imaging of X-ray absorption fine structure (XAFS) and time-resolved high-speed computed tomography (CT) using synchrotron radiation (SR). This camera is a lens-coupled type, composed of a scintillator, an imaging lens system, and a high-speed visible light sCMOS, capable of imaging with a minimum exposure time of 1 μs and a maximum frame rate of 5000 frames/s (fps). A feasibility study using white and monochromatic SR at the beamline BL07 of the SAGA Light Source showed that fine X-ray images with a spatial resolution of 77 μm can be captured with an exposure time of 10 μs. Furthermore, quick imaging XAFS, combined with high-speed energy scanning of a small Ge double crystal monochromator of the same beamline, enabled spectral image data to be acquired near the Cu K-edge in a minimum of 0.5 s. Additionally, an in coquendo 4DCT (time-resolved 3D observation of cooking processes) observation combined with a high-speed rotation table revealed the boiling process of Japanese somen noodles over 150 s with a time resolution of 0.5 s.