Ultra-high-speed indirect x-ray imaging system with versatile spatiotemporal sampling capabilities

Abstract

A new generation of cameras has made ultra-high-speed x-ray imaging at synchrotron light sources a reality, revealing never-before-seen details of sub-surface transient phenomena. We introduce a versatile indirect imaging system capable of capturing-for the first time-hundreds of sequential x-ray pulses in 16-bunch mode at the European Synchrotron Radiation Facility, recording at 5.68 Mfps over dozens of microseconds, with an effective exposure of 100 ps. The versatile multiplex camera construction of the system allows for various arrangements, including different scintillator configurations, and simultaneous imaging with different resolutions and regions of interest. Image results from a gas gun impact experiment, in which an additive manufactured aluminum lattice was dynamically compressed, is presented as a demonstration of the system's capabilities.

Visual Methods to Assess Strain Fields in Armour Materials Subjected to Dynamic Deformation—A Review

“…This third method the authors describe is similar to DIC and hence could be adapted to provide high and ultra-high-speed 3D DIC, with very small spatial resolution. Further work has been done with X-ray imagining at the European Synchrotron Radiation Facility by Escauriza et al [65] The authors were able to achieve an effective frame rate of 5.68 million FPS, by using three Shimadzu Hyper Vision HPV-X2 cameras (Shimadzu, Kyoto, Japan). The authors converted the x-rays to photons, detectable by the cameras with in-line scintillators.…”

“…Their system was able to capture a pixel size of 32 µm and given the main features of the object were significantly larger than the characteristic length, the edge contrast in the recorded images was enhanced, while preserving the attenuation projection of the target. The experiment the authors used to test the Further work has been done with X-ray imagining at the European Synchrotron Radiation Facility by Escauriza et al [65] The authors were able to achieve an effective frame rate of 5.68 million FPS, by using three Shimadzu Hyper Vision HPV-X2 cameras (Shimadzu, Kyoto, Japan). The authors converted the X-rays to photons, detectable by the cameras with in-line scintillators.…”

“…Their system was able to capture a pixel size of 32 µm and given the main features of the object were significantly larger than the characteristic length, the edge contrast in the recorded images was enhanced, while preserving the attenuation projection of the target. The experiment the authors used to test the method was the impact of a gas gun projectile into an additively manufactured aluminium lattice [65].…”

Use of synchrotron-based radiography to diagnose pulsed power driven wire explosion experiments

“…ID19's two U32 undulators were operated at minimum gap of 11.1 mm and 11.5 mm in order to maximise the spectral flux, giving an x-ray energy spectrum of ∼20 keV-∼50 keV, with mean energy of ∼30 keV. Complete predictions of the spectral flux with these undulator settings were performed by Escauriza et al 18 To minimise heating of the target, particularly the water, and the scintillator, a 1.4 mm diamond filter and a 0.7 mm aluminium filter were positioned in the beam path. The total duration of exposure of the system to the x-ray pulses was limited using a fast shutter to 0.2 s. ID19 had 2 separate "hutches" on the x-ray beam path in which experiments can be conducted.…”

Insights into local shockwave behavior and thermodynamics in granular materials from tomography-initialized mesoscale simulations

“…Future work should repeat these experiments with more than two radiographic measurements per experiment in order to further understand the sensitivity of the mesoscale simulations to choice of tomography slice. Such an experiment would be an ideal opportunity to exploit the newly developed three-camera system reported by Escauriza et al 35…”