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Double-Laue monochromator at F2

Figure 1b: Sagittal bender. Red arrows indicate paths of X-ray travel.

The monochromator consists of benders (for sagittal focusing), tilt stages (for diffraction angle adjustments), and several travel stages (for aligning monochromator crystals).

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Peter Ko
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J. Y. Peter Ko: Hands-on experience makes an x-ray optics expert

His current position at CHESS is "project scientist." Peter has played a key role in designing a new type of x-ray monochromator that provides uniquely flexible capabilities to focus high photon energy (40-100keV) beams to feed the F2 station. We've highlighted the new hardware capabilities previously [1].

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Peter Ko
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New capability for energy materials

In the past, users performing electrochemical experiments at beamlines brought their potentiostats from their home laboratories. Because they are delicate, there is a risk of breakage of their internal components while transporting them, adding delays to users’ research programs if they do break. By having one at CHESS, users no longer need to bring one from their laboratories. There are several advantages of the Bio-Logic model. First, because of its portable design, it can easily be set up at different stations.

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Peter Ko
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Understanding deformation in shape memory alloys using high-energy X-ray diffraction microscopy

Due to these favorable properties, they have potential for various industrial and medical applications. The shape memory property in these materials is possible due to thermally- or stress-induced transformation from austenite phase to martensite phase; however microstructural elements in nickel-titanium (NiTi) SMAs –  such as precipitates, inclusions and grain boundaries – can be sources of constraints that negatively influence response to their deformation. Prof.

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Peter Ko
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