High-speed rotating device for X-ray tomography with 10 ms temporal resolution

Abstract

The temporal resolution of X-ray tomography, using a synchrotron radiation X-ray source, has been improved to millisecond order in recent years. However, the sample must be rotated at a speed of more than a few thousand revolutions per minute, which makes it difficult to control the environment around the sample. In this study, a high-speed rotation device has been developed, comprising two synchronized coaxial motors movable along the direction of the axis, which can stretch or compress the rotating sample. Using this device, tomograms of breaking rubber were successfully obtained at a temporal resolution of 10 ms.

Exploring Frontiers of 4D X-ray Tomography

“…Recently, dynamic 4D observation has also become possible. Figure 7 demonstrates 4D X-ray CT with a temporal resolution of 10 ms for the process of breaking rubber while pulling it [41,42]. The upper left pad of Figure 7 shows a schematic illustration of the rotating device for the 4D X-ray CT.…”

“…Figure 7. Real-time 4D observation of rubber tensile fracture process (10-ms temporal resolution)[41,42]. Upper: rotation device for high-speed X-ray CT, lower: 4D tomograms of tensile fracture process of rubber.…”

High-resolution fast-tomography brain-imaging beamline at the Taiwan Photon Source

“…Our current imaging system is not optimized for fast shutter speed, < 1 ms, and high image frame rate, >100 Hz (Mokso et al, 2017). Moreover, the current sample rotation mechanism for tomography cannot operate at high speed to take advantage of the 1 ms exposure (Mashita et al, 2021).…”

Microscopic observation of the effects of elongation on the polymer chain dynamics of crosslinked polybutadiene using quasi-elastic γ-ray scattering

“…For example, it was reported that the cavities formed during the fracture of a material improve its resistance to further fracture owing to the release of polymer constraints between cavities (Ishikawa & Chiba, 1990). Although the macroscopic fracture phenomenon has been examined using electron microscopy, X-ray tomography and mechanical measurements (Bayraktar et al, 2008;Uesugi et al, 2016;Mashita et al, 2021), few studies have focused on the changes in polymer dynamics associated with stress concentration and release at the molecular scale. Understanding the stress-producing phenomenon over a wide range (i.e.…”

“…Improvements in the mechanical strength and resistance to fracture are required in numerous rubber products. It is therefore desirable to clearly understand the microscopic fracture mechanism of rubber, and so considerable research has been conducted on the fracturing of polymer materials (Ishikawa & Chiba, 1990;Bayraktar et al, 2008;Uesugi et al, 2016;Mashita et al, 2021;Choi et al, 2012;Naoki et al, 1974;Nakajima et al, 1978;Diaz-Calleja et al, 1987;Munch et al, 2006;Boyer, 1968;Engels et al, 2012;Retting, 1970;Kalfoglou & Williams, 1972;Suzuki et al, 2019). For example, it was reported that the cavities formed during the fracture of a material improve its resistance to further fracture owing to the release of polymer constraints between cavities (Ishikawa & Chiba, 1990).…”