Issue No. 51
From the Director
These are exciting times here at CHESS. It's always a good feeling to have users back on the experimental floor after the winter down.

The science performed by CHESS users continues to be spectacular. The articles on Shape Memory Alloys and Li-S Battery Operation are stunningly beautiful examples of multi-dimensional x-ray data sets being applied to challenging technological problems with enormous societal impact. The 3D structural model and local strain states of a shape memory alloy generated by HEDM coupled with sophisticated modeling enabled researchers to track the local stress states as the material responds to cyclic loading. The time-resolved study of Li-S as it discharges provides for the first time a clear picture of how these batteries operate. Both of these studies required CHESS's intense high energy x-ray beams and experimental support systems.

And, the CHESS-U upgrade is in full production mode. Magnet girders, front ends, hutches, and x-ray optics are all being delivered, characterized, and prepared for installation this summer. A prototype hutch (ID1A3) was installed this fall, received first light on January 31st, and first experiments are already taking advantage of the new capabilities and collecting data as I type. Stay tuned for more exceptional science!

Finally, CHESS continues to develop new x-ray optics technology. The article on DRIE of channels in germanium illustrates CHESS's continuing work on transformative new x-ray optical devices.

Please note that the date of the 2018 CHESS Users' Meeting has been changed to May 15th, 2018. Once again, in addition to the general meeting, CHESS will host hands-on technical workshops. Check the CHESS website periodically for updates.

Hope to see you all on the experimental floor sometime soon.

-Joel Brock

              February 7 - April 3

              April 11 - June 4

              March 9

              May 15

Shape memory alloys (SMAs) are materials that can "remember" their original form after undergoing deformation... more »

With the dramatic increase of energy applications, the development of novel high performance electro energy storage systems with energy densities surpassing those of state-of-the-art lithium ion batteries has become more urgent.... more »

Time multiplexed, deep reactive ion etching is a standard silicon microfabrication technique for fabricating MEMS sensors, actuators, and more recently in CMOS development... more »

Little known outside of a small, but growing group of aeronautics enthusiasts, walkalong gliding has been described as "the paper airplane that keeps on flying."... more »

The first hutch constructed for the CHESS-U upgrade has begun commissioning and saw first light on January 31, 2018, a short 10 months after the contract with ADC Inc. to pre-fabricate the hutch enclosures was signed... more »
The Cornell High Energy Synchrotron Source (CHESS), a national user facility, is supported by the National Science Foundation under NSF award DMR-1332208. CHESS is operated and managed for the National Science Foundation by Cornell University. Structural biology at CHESS is supported by MacCHESS award GM-103485 from the National Institutes of Health/National Institute of General Medical Sciences.

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