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    Scattering Probes of Material Structure

    BYU physics researchers use some of the world's brightest x-ray and neutron sources to study the atomic structure and dynamics of advanced materials like superconductors and piezoelectrics. At the Advanced Photon Source at Argonne National Laboratory, electrons travel around a one-kilometer synchrotron ring at nearly the speed of light, emitting high-energy tangential Bremsstrahlung x-rays that are collimated into beams and scattered from material samples.

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    Ready for Another Night

    University Photographer, Mark Philbrick, captured this sunset image of the BYU West Mountain Observatory in early June 2016. At the same time, Physics and Astronomy students were at work preparing the telescopes for yet another night of research observations. Data are secured on these nights for a wide variety of projects ranging from careful searches for exoplanets to monitoring active galaxies. The resulting data support research efforts of BYU students and faculty and in many cases contribute to larger international collaborations.

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    Radiation from Wavepackets

    When an electron is born through ionization in a strong laser field, the wavepacket can be very large. As this large wavepacket continues to experience the laser field, different parts of the packet are accelerated in different directions. How will such a system radiate light? Contradicting predictions have been published in the literature, and Professors Justin Peatross and Michael Ware are looking to solve the issue with theory and experiment.

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    Predictions on candidate superalloys

    Superalloys are high-performance materials that are essential to key transportation and power generation technologies. By using BYU's supercomputer as a virtual lab, together with state-of-the-art algorithms for modeling materials, the Materials Simulation Group (msg.byu.edu) has identified 75 new superalloy candidates for which there are no reported phase diagrams. The new candidates may be the key to enhanced performance in transportation and power generation components. The figure shows the computed formation enthalpy over more than 700 Ni-based systems that were explored as part of this large survey. Roughly speaking, the darker the circle, the more promising the system. The x-y coordinates in the grid denote the two minority elements that are combined with nickel.

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    Predicting new superalloys

    Superalloys are high-performance materials that are essential to key transportation and power generation technologies. By using BYU's supercomputer as a virtual lab, together with state-of-the-art algorithms for modeling materials, the Materials Simulation Group (msg.byu.edu) has identified 75 new superalloy candidates for which there are no reported phase diagrams. The new candidates may be the key to enhanced performance in transportation and power generation components. The figure shows the formation enthalpy and relative stability (to other phases) of more than 2000 Ni/Co/Fe-based systems. The Co- and Fe-based systems have been offset to the right for clarity. Any system landing in the dashed boxes is more promising than the new Co-Al-W system that was discovered in 2006 (Sato et al, Science).

Calendar

18 Jan, Today

Colloquium: Nick Nelson
4:00 PM
Sunset
5:29 PM

19 Jan, Thursday

Sunrise
7:46 AM

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Recently Published Research

Harold Stokes, Seth Van Orden, and Branton Campbell recently published an article titled "ISOSUBGROUP: an internet tool for generating isotropy subgroups of crystallographic space groups" in Journal of Applied Crystallography. Click on the image above to read it.

Astronomy Picture of the Day

Space Station Vista: Planet and Galaxy: If you could circle the Earth aboard the International Space Station, what might you see? Some amazing vistas, one of which was captured in this breathtaking picture in mid-2015. First, visible at the top, are parts of the space station itself including solar panels....

This photograph and Description come from NASA's Astronomy Picture of the Day web site.

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