Volumetric X-Ray Imaging for Ceramic Microturbine Rotors

2002 ◽  
Author(s):  
W. A. Ellingson ◽  
E. R. Koehl ◽  
J. Stainbrook ◽  
M. Rivers
Keyword(s):  
Cross Sections ◽  
High Speed ◽  
Production Costs ◽  
Imaging Method ◽  
Scale Production ◽  
Full Size ◽  
X Ray ◽  
X Ray Imaging ◽  
Proof Testing ◽  
Ceramic Components

Use of ceramic components in the hot section of gas-fired microturbines would allow higher operating temperatures and thus better operating efficiencies. However, the cost of such ceramic components is an issue for commercial-scale production. Costs can be reduced, in part, through improving fabrication yields. Use of nondestructive evaluation (NDE) methods in early stages of fabrication will support the development process to improve yields and subsequently reduce costs by rejecting flawed components prior to final processing and proof testing. An NDE approach using high-speed 3D X-ray tomographic imaging has been investigated. A large (40 × 40 cm), flat-panel, amorphous silicon X-ray detector, together with fast image processing, has been shown to allow full-volume X-ray imaging with detection of internal features in full-size as-cast parts. Gelcast radial-flow microturbine rotors, ≈23 cm in diameter, have been studied for internal defects with this 3D X-ray imaging method. Internal cracks, voids, and other variations in density within the rotors have been detected. Data acquisition speeds of 3 full frames per second have been achieved with reconstruction times of individual cross-sections of less than 1 second. This paper presents details of the 3D X-ray imaging method and results achieved on full-size microturbine rotors.

UFO — a scalable platform for high-speed synchrotron X-ray imaging

2016 ◽  
Author(s):  
Andreas Kopmann ◽  
Suren Chilingaryan ◽  
Matthias Vogelgesang ◽  
Timo Dritschler ◽  
Andrey Shkarin ◽  
...  
Keyword(s):  
High Speed ◽  
X Ray ◽  
X Ray Imaging

syris: a flexible and efficient framework for X-ray imaging experiments simulation

2017 ◽  
Vol 24 (6) ◽  
pp. 1283-1295 ◽  
Author(s):  
Tomáš Faragó ◽  
Petr Mikulík ◽  
Alexey Ershov ◽  
Matthias Vogelgesang ◽  
Daniel Hänschke ◽  
...  
Keyword(s):  
Motion Estimation ◽  
Data Processing ◽  
Graphics Processing Units ◽  
High Speed ◽  
Real Data ◽  
Estimation Accuracy ◽  
Processing Parameter ◽  
X Ray ◽  
X Ray Imaging ◽  
Imaging Conditions

An open-source framework for conducting a broad range of virtual X-ray imaging experiments,syris, is presented. The simulated wavefield created by a source propagates through an arbitrary number of objects until it reaches a detector. The objects in the light path and the source are time-dependent, which enables simulations of dynamic experiments,e.g.four-dimensional time-resolved tomography and laminography. The high-level interface ofsyrisis written in Python and its modularity makes the framework very flexible. The computationally demanding parts behind this interface are implemented in OpenCL, which enables fast calculations on modern graphics processing units. The combination of flexibility and speed opens new possibilities for studying novel imaging methods and systematic search of optimal combinations of measurement conditions and data processing parameters. This can help to increase the success rates and efficiency of valuable synchrotron beam time. To demonstrate the capabilities of the framework, various experiments have been simulated and compared with real data. To show the use case of measurement and data processing parameter optimization based on simulation, a virtual counterpart of a high-speed radiography experiment was created and the simulated data were used to select a suitable motion estimation algorithm; one of its parameters was optimized in order to achieve the best motion estimation accuracy when applied on the real data.syriswas also used to simulate tomographic data sets under various imaging conditions which impact the tomographic reconstruction accuracy, and it is shown how the accuracy may guide the selection of imaging conditions for particular use cases.

scholarly journals In Situ Analysis of Laser Powder Bed Fusion Using Simultaneous High-Speed Infrared and X-ray Imaging

JOM ◽  
2020 ◽  
Vol 73 (1) ◽  
pp. 201-211 ◽  
Author(s):  
Benjamin Gould ◽  
Sarah Wolff ◽  
Niranjan Parab ◽  
Cang Zhao ◽  
Maria Cinta Lorenzo-Martin ◽  
...  
Keyword(s):  
High Speed ◽  
In Situ Analysis ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
X Ray ◽  
X Ray Imaging

High speed X-ray imaging camera using a structured CsI(Tl) scintillator

1999 ◽  
Vol 46 (3) ◽  
pp. 232-236 ◽  
Author(s):  
V.V. Nagarkar ◽  
S.V. Tipnis ◽  
T.K. Gupta ◽  
S.R. Miller ◽  
V.B. Gaysinskiy ◽  
...  
Keyword(s):  
High Speed ◽  
X Ray ◽  
X Ray Imaging ◽  
Imaging Camera

Hydrogen diffusion in titanium-hydride observed by the diffraction-enhanced X-ray imaging method

2007 ◽  
Vol 204 (8) ◽  
pp. 2734-2739 ◽  
Author(s):  
K. Mizuno ◽  
Y. Furuya ◽  
K. Hirano ◽  
H. Okamoto
Keyword(s):  
Titanium Hydride ◽  
Hydrogen Diffusion ◽  
Imaging Method ◽  
X Ray ◽  
X Ray Imaging

Experimental study of single vs. two-close-frequency heating impact on confinement and losses dynamics in ECR Ion Sources plasmas by means of X-ray spectroscopy and imaging

2021 ◽  
Author(s):  
David Mascali ◽  
Eugenia Naselli ◽  
Richard Racz ◽  
Sándor Biri ◽  
Luigi Celona ◽  
...  
Keyword(s):  
Ion Source ◽  
Single Frequency ◽  
Specific Power ◽  
Imaging Method ◽  
X Ray ◽  
Plasma Chamber ◽  
X Ray Imaging ◽  
Close Frequency ◽  
The Impact ◽  
Frequency Heating

Abstract We hereby report the study of confinement and electron losses dynamics in the magnetic trap of an Electron Cyclotron Resonance Ion Source (ECRIS) using a special multi-diagnostic setup that has allowed the simultaneous collection of plasma radio-self-emission and X-ray images in the range 500 eV - 20 keV. Argon plasmas were generated in single and two close frequency heating (TCFH) modes. Evidences of turbulent regimes have been found: for stable and unstable configurations quantitative characterizations of the plasma radio self-emission have been carried out, then compared with local measurement of plasma energy content evaluated by X-ray imaging. This imaging method is the only one able to clearly separate X-ray radiation coming from the plasma from the one coming from the plasma chamber walls. X-ray imaging has been also supported and benchmarked by volumetric spectroscopy performed via SDD and HPGe detectors. The obtained results in terms of X-ray intensity signal coming from the plasma core and from the plasma chamber walls have permitted to estimate the average ratio: plasma vs. walls (i.e., plasma losses) as a function of input RF power and pumping wave frequency, showing an evident increase (above the experimental errors) of the intensity in the 2-20 keV energy range due to the plasma losses in case of unstable plasma. This ratio was well correlated with the strength of the instabilities, in single frequency heating (SFH) operation mode; in TCFH mode, under specific power balance conditions and frequency combinations, it was possible to damp the instabilities, thus the plasma losses were observed to decrease and a general reconfiguration of the spatial plasma structure occurred (the X-ray emission was more concentrated in the center of the plasma chamber). In the end, a simplified model has been used to simulate electron heating under different pumping frequencies, discussing the impact of velocity anisotropy vs. the onset of the instability, and the mechanism of particles diffusion in the velocity space in stable and unstable regimes.

High-efficiency fast X-ray imaging detector development at SSRF

2019 ◽  
Vol 26 (5) ◽  
pp. 1631-1637
Author(s):  
Honglan Xie ◽  
Hongxin Luo ◽  
Guohao Du ◽  
Chengqiang Zhao ◽  
Wendong Xu ◽  
...  
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Sampling Rate ◽  
Coupling Efficiency ◽  
Numerical Aperture ◽  
X Ray ◽  
Temporal Sampling ◽  
X Ray Imaging ◽  
Imaging Detector ◽  
Working Distance

Indirect X-ray imaging detectors consisting of scintillator screens, long-working-distance microscope lenses and scientific high-speed complementary metal-oxide semiconductor (CMOS) cameras are usually used to realize fast X-ray imaging with white-beam synchrotron radiation. However, the detector efficiency is limited by the coupling efficiency of the long-working-distance microscope lenses, which is only about 5%. A long-working-distance microscope lenses system with a large numerical aperture (NA) is designed to increase the coupling efficiency. It offers an NA of 0.5 at 8× magnification. The Mitutoyo long-working-distance microscope lenses system offers an NA of 0.21 at 7.5× magnification. Compared with the Mitutoyo system, the developed long-working-distance microscope lenses system offers about twice the NA and four times the coupling efficiency. In the indirect X-ray imaging detector, a 50 µm-thick LuAG:Ce scintillator matching with the NA, and a high-speed visible-light CMOS FastCAM SAZ Photron camera are used. Test results show that the detector realized fast X-ray imaging with a frame rate of 100000 frames s−1 and fast X-ray microtomography with a temporal sampling rate up to 25 Hz (25 tomograms s−1).

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