链接地址：https://www.chess.cornell.edu/
Focusing on our users and the unique capabilities of CHESS, CHESS-U is an upgrade that will extend CHESS’s capacity for cutting-edge, innovative science and technology. This will be achieved by replacing of one-sixth of the CESR storage ring with modern multibend achromats and by replacing or upgrading the x-ray beamlines to take greatest advantage of the new undulator sources.At the completion of CHESS-U in 2018, CHESS will be the premier synchrotron source in the US for high-energy, high-flux x-ray studies.
High Flux + High Energy = High Penetration
High-energy x-rays (20-150keV) have a wavelength short enough that diffraction can determine the distance between atoms and energy well above electron binding energies, minimizing photoelectric absorption and enhancing penetration. These characteristics are key requirement for in-situ and operando studies of materials at the macroscopic level. The horizontal emittance of the ribbon shaped beam created in CHESS-U will be ~30 nanometers, allowing users to perform experiments like never before!
This upgrade will enable new scientific capabilities at CHESS including enhanced microspectroscopy for a variety of life sciences, improved time-resolved XRD for both metallurgical metals/alloys as well as fundamental studies into strongly correlated materials.
Flexibility for the Future
CHESS plays a leading role in development of innovative instrumentation in support of first- and best-of-class experiments. CHESS-U will provide even more undulator beamtime availability for individual user groups to develop new instruments, new techniques, and new applications for synchrotron radiation.
Internationally, it is becoming harder and harder for students (undergraduate, graduate) to actively get"behind the shield wall,"CHESS welcomes students to actively participate in the design and assembly of their experiments. This approach introduces a new generation of synchrotron scientists that will greatly impact the world of physics.
