Throughout the years, we have developed five different types of VBPMs. These VBPMs are schematically shown in Figure 1 with images created by these devices. All VBPMs provide position information with submicron precision, in addition to visual information about the X-ray cross-sectional shape. The data delivered from the VBPMs are normally updated in each second. This frequency of data delivery is appropriate for the position feedback system and our signal-archiving timing intervals.

Students will have a day and a half of lectures and hands-on software tutorials on the basics of BioSAXS data collection and processing from expert practitioners in the field. This will be followed by real data collection on MacCHESS beamlines (F1 and G1 stations).

And, the tiny beam has to hit the tiny crystal. The location of the beam can be well determined and doesn't change, but how do we know where the crystal is?

SABIC recently instituted this award to spur and acknowledge innovation in scientific and engineering fields contributing to the advancement of chemical engineering. Purdum is the first author on the paper "Understanding Polymorph Transformations in Core-Chlorinated Naphthalene Diimides and their Impact on Thin-Film Transistor Performance," published recently in Advanced Functional Materials [1].

Their paper - “High Dynamic Range Pixel Array Detector for Scanning Transmission Electron Microscopy” - discusses the transfer of their popular x-ray detector technology into the environment of the electron microscope [1]. Pixel Array Detectors, or PADs, have brought outstanding new capabilities to x-ray instruments, such as in-pixel circuitry providing a 1,000,000:1 dynamic range within a single frame and 1.1 kHz framing rate enabling rapid data collection.

Dr. Georg Hoffstaetter, former head of the SRF group, will now become Cornell’s Principal Investigator for C-BETA (Cornell-Brookhaven ERL Test Accelerator).

The day included talks by Peter Wittich, on his past work at the Sudbury Neutrino Observatory, and Julia Thom-Levy, on the CERN particle accelerator. Both are Cornell associate professors of physics who co-sponsored the event through funding from the Particle Physics at the Energy Frontier Award #1307256, from the National Science Foundation. Research Assistant Professor Ryan Fisher, from Syracuse University, also presented on the recent news of the first observation of gravitational waves and on his work with Advanced LIGO.

A joint team of scientists from the Cornell High Energy Synchrotron Source (CHESS), King Abdullah University of Science and Technology (KAUST) in Saudi Arabia, and Stanford University just reported an experimental break-through for studying the structural evolution of organic transistor layers during the coating process in-situ and in real-time with x-ray scattering.

Organic field-effect transistors (OFETs) find multiple applications, for instance as switches in active displays, radio frequency identification tags, or flexible biomedical sensors. The mobility of an organic semiconductor film is a measure for the velocity of charge carrier transport and is reflected in the operational speed of the device. Normally, the single crystal of an organic semiconductor achieves higher mobility than a thin film by several orders of magnitude, but would be hard to implement in solution-based production processes.

The signals look much like x-ray absorption near-edge spectroscopy (XANES), but the element K-edges (E_K) are not otherwise accessible at CHESS. XRS offers possibilities for monitoring light element chemical and physical processes when soft x-rays cannot be used, for example samples at high pressure or during chemical processing. Analyzer crystals are positioned to collect and reflect scattered hard x-ray photons at energy E₁ as incident beam energy E₀ is scanned in the vicinity of E₁+ E_K.