During the almost 90-minute visit, Reed held a series of question and answer sessions with managers, researchers and staff.
Among many topics, Reed learned about the history of the facility, talked with engineers who use X-rays to study the atomic origins of failures in metal structures, and learned how researchers are developing a highly energy efficient, prototype high energy, highly focused linear electron beam accelerator.
This suggests a fundamental connection between superconductivity and fluctuations in some other order parameter.
The VBPMs great advantage over the traditional white beam monitors is that they provide simultaneously beam position, profile full-width half maximum (FWHM) and intensity information about the beam. The fact that the beam can also be observed visually make the beam setup/alignment procedure much faster and easier.
Diamond VBPMs now operate at A, C, D, F3 and G2 beam lines along with Helium luminescence and X-ray scatter based VBPMs.
Instead of watching Saturday morning cartoons, these students got out of bed early to come to Cornell University to learn about how light can be focused and used for scientific experiments. In addition to creating edge-lit cards by carving scraps of plexiglass material and hooking up LED's to button-batteries, kids took a tour of the CHESS experimental hutches. They peered into a microscope to view samples of crystalized proteins and learned how light from the accelerator is captured to produce extraordinary images of tiny structures.
A classic example of such a molecule is TIPS-pentacene with a pentacene backbone and two bulky tri-isopropyl silyl ethynyl (TIPS) side groups that render the molecule soluble in toluene. A feature of this class of materials is low lattice symmetry and polymorphism, i.e., depending on the crystallization conditions, different crystal structures and types of molecular packing may form. The distance between the p-orbitals is all-important for device performance - the closer the better.
Due to the demand for longer and larger inner and outer diameter capillaries, a new requirement is the need to measure outer diameters greater than 6 mm. Example projects include requests by the APS transmission x-ray microscope project, Cornell’s X-ray emission spectrometer project and the FDA laser funnel application. To accommodate these requests, a newly purchase Keyence sensor head with monitor, Model LS-7030M will be soon commissioned. It expands our capabilities to profile large outer diameter capillaries up to 30 mm.
On the other hand, long ERL undulators with short periods will generate higher radiation power density on beamline first optics than encountered at 3rd generation sources. We have recently published thermal and strain analyses, and wavefront simulation for cryogenic cooled Si(111) monochromators showing that beam quality within the radiation central cone should be well preserved. This important result depends strongly on very small ERL source emittance in BOTH horizontal and vertical directions, making the undulator central cone very small.
The system was designed with flexibility in mind, allowing for X-ray diffraction experiments to be combined with a wide suite of mechanical tests. Loads are applied to samples by a Bose 3330 testing system capable of applying a max 3000N at a frequency of 100hz for high-cycle fatigue testing. 250lbs (1112N) and 1000lbs (4448N) load cells are available for high and low load amplitude loading. Fixtures are available for tensile, compressive, and fully reversed loading. A furnace capable of heating samples to 1000°C during mechanical loading is also available.
In a recent work, Masayo Suzuki et. al.1 have reported the development of a high-flux X-ray monitor based upon the scintillation of Ar gas as X-rays pass through it. Unlike ion chambers, where the temporal response is limited by the drift velocity of charged particles in gaseous media, it is possible for Ar-scintillation monitors to yield time resolution better than 50 ns.
At CHESS, we have created a device that uses the same principle as the one mentioned above with the added capability of measuring X-ray beam position, in addition to flux.
Self-made tape measurers hang suspended from the ceiling, stretched to reach the tops of the tables with 10cm increments clearly marked. Kids take turns vertically propelling the balls using student-made ball-launchers. This was the scene in the eXploration station this past month when first graders from Fall Creek Elementary School participated in bimonthly visits to Xraise at Cornell during the past school year. Teachers Chris Bell and Abigail Bokaer brought their students, sometimes riding the bus and sometime walking up the hill, to participate in these science investigations.