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X-RAY RUNS: Apply for Beamtime

2017  Nov 1 - Dec 21

2018  Feb 7 - Apr 3
2018  Proposal/BTR deadline: 12/1/17

2018  Apr 11 - Jun 4
2018  Proposal/BTR deadline: 2/1/18

Issue No. 12
The exciting installation of undulator x-ray sources at CHESS culminates two years of development and overcoming past limitations. Longtime staff and users will recall that many years ago CHESS worked with APS staff to design and test "APS undulator A". Doing that required running our storage ring with only a single beam of electrons. The challenges of being able to run undulators with both electrons and positrons in the machine, as well as overcoming x-ray optics heat load problems caused by short length beamlines at CHESS, have all been overcome by a steady application of ingenuity and engineering talent. And, I might add, by patience on the part of the user community who helped us work around a lengthy commissioning cycle. Short articles by Arthur Woll and Jacob Ruff show the gains already being made at G and A-lines, respectively. Other stories continue the beat of providing new capabilities - a Pilatus 6M detector at A1 and a novel x-ray emission spectrometer at C-line. We've also just posted dates and deadlines for the first two run cycles in 2015, so prepare more great experiments!

Ernest Fontes



2014: October 8 - December 9
2015: February 4 - March 31
   Proposals due 12/3/14; Beamtime Requests due 1/5/15
2015: May 27 - July 14   Proposals due 3/10/15; Beamtime Requests due 4/15/15 




♦  JOB OPENING:   Engineering Materials Specialist at CHESS/Cornell 

As of October 2014, the three CHESS experimental stations known as G-line joined A1 and A2 in becoming among the first undulator-fed beam lines at CHESS. Thanks to a little luck and a lot of clever engineering... more »
The CHESS West wiggler source was removed over the summer.  In its place are two custom 1.5m CHESS Compact Undulators which now feed the A-line/G-line endstations... more »
For most of CHESS's history, it was not possible to use undulator insertion devices. The reason for this was that in order to counter-rotate electrons and positrons in the same storage ring there had to be a "pretzel" orbit that caused the two particle beams... more »
A Pilatus3 6M pixel array detector has replaced the Q-210 CCD detector in the A1 hutch. This is the preferred detector worldwide for macromolecular crystallography, because of its large dynamic range, zero background, very small point spread function, and millisecond readout time... more »
The CHESS A-Line controls and safety systems have been upgraded to a modern PLC based system. The old relay and L.E.D. system has been replaced with a hybrid system that... more »
CHESS scientist Ken Finkelstein and engineers Aaron Lyndaker and Tom Krawczyk have just completed a unique, high resolution spectrometer for x-ray fluorescence studies... more »
Starting last October, the CLASSE IT group has been commissioning a new data acquisition network with high-speed low-latency connections from the CHESS beamlines to over 130 terabytes of redundant disk arrays dedicated to the storage of CHESS x-ray data... more »
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The Cornell High Energy Synchrotron Source (CHESS), a national user facility, is supported by the National Science Foundation and the National Institutes of Health/National Institute of General Medical Sciences under NSF award DMR-1332208. CHESS is operated and managed for the National Science Foundation by Cornell University.
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