The following science pages will show how X-rays have become a mainstream tool for examining the structure and function of our material world, with an eye towards designing new materials, solving technological problems, and even curing diseases.
CHESS users come from around the world and represent both academic and corporate communities.
The National Science Foundation will support a “sub-facility” at CHESS. Other federal and state agencies, private foundations, academic institutions, and private industry will become partners, supporting and developing other portions of CHESS.
With a strong commitment to education, CHESS provides experiences to students, educators and the public that make science familiar and accessible.
The Cornell High Energy Synchrotron Source is a high-intensity X-ray source which provides our users state-of-the-art synchrotron radiation facilities for research in Physics, Chemistry, Biology, and Environmental and Materials Sciences.
X-ray attenuation/absorption data are from the NIST database.
The average ionization enegies are obtained from the SLAC web site.
Standard CHESS chamber lengths: short: 6 cm, long: 27 cm.
A calculator program uses a simple model to calculate the X-ray flux from the ion chamber current data. The model includes single-ionization of the gas, and does not takes into account some of the secondary effects such as charge recombination, or space-charge effect.
At station A2 with multi-layer optics at 10keV.
The 6cm N2 ion chamber count was 109400 at 1E-6 gain. The calculated flux: 9.6E11 ph/s.
At station A2 with <111> optics at 50keV.
The 6cm N2 ion chamber count was 722000 at 1E-10 gain. The calculated flux: 2.55E9 ph/s.