Visiting scientists from the University of Virginia have used the facilities of the Cornell High Energy Synchrotron Source (CHESS) to observe their chemistry in action. By firing high-intensity X-rays into a sample in a process known as X-ray crystallography, CHESS scientists took a series of snapshots of a material as it crystallized, showing how changes in the formula affect the process of crystal growth.
NSF CAREER Award, 2017-2022
Assistant Professor Silberstein received a 5-yr, 500,000 award from the Division of Civil, Mechanical and Manufacturing Innovation (CMMI), NSF.
Award Abstract #1653059
CAREER: Building a Mechanistic Understanding of Mechanochemically Adaptive Polymers
With the capability of handling above one million counts per second per channel, the implementation of a 4 channel Xspress 3 for the Vortex ME-4 solid drift detector (SDD) at CHESS makes it easy to count multi-million counts per second of XRF. That is an increase of XRF counting rate by more than one order of magnitude comparing to the DXP-XMAP system we have been using for Vortex ME-4 SDD up to recently.
This means that beyond what happens on the front lines here at our lab, we foster a culture of science that transcends the space between our walls. Our public engagement and education team, Xraise, raises interest and awareness in science by letting the science speak for itself. Bathed in photons and electrons our entire lives, it’s easy to take for granted that light is emitted when charged particles are accelerated.
In this project, dubbed CHESS-U, an 80 meter section of the Cornell Electron Storage Ring (CESR) will be replaced by 12 compact double-bend achromats (DBA’s) to lower electron beam emittance by a factor of three. The critical element in the achromat is a 2.3 meter long combined function (CF) dipole magnet which has a curved geometry. In this cost-effective and transversely compact design, the magnet has a “C-shape” core of dimensions 260 x 412 mm and tapered pole shape.
Neatly sorted pallets of steel I-beams and C-channel litter the assembly area. A new 10’ long welding table holds a massive section of wall structure. Assembled across the room, standing tall, are the first three sections. Fully welded and bolted together, they tower over CHESS Staff inspecting what will become the first new hutches built at CHESS in over 15 years. We are on schedule for installation late this summer and commissioning of hutch 1A3 as an extension of the F2 hutch in January of 2018.
Short summaries for various systems follow below.
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.
This seminar was established based on a general interest in learning more about CHESS, how a synchrotron works, and basic information about many x-ray methods. Members intend to both expand upon personal knowledge of x-ray methods and incorporate new techniques into their respective research projects.