Section: People

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Peter (Jun Young) Ko

Project Scientist - CHESS

While he has never taken any formal courses in "synchrotron beamline science", Jun Young Peter Ko has worked on projects over the past 10 years that were clearly moving him towards expertise in the field. His current position at CHESS is "project scientist." Peter has played a key role in designing a new type of x-ray monochromator that provides uniquely flexible capabilities to focus high photon energy (40-100keV) beams to feed the F2 station. We've highlighted the new hardware capabilities previously [1]. Two critically important aspects of this development were to make it possible for the CHESS F2 station to provide high-intensity, high-energy x-ray beams competitive with other light sources, and also to make possible new in-situ and operando science initiatives at CHESS in structural and energy materials.

Coming to Cornell, Peter took a post-doctoral position with Joel Brock in the School of Applied and Engineering Physics, supported by the Energy Materials Center at Cornell (emc2). Stationed at CHESS, he supported researchers using the A2 station to perform in-situ and operando x-ray diffraction studies of electrochemical systems, including surface characterization of electrodeposition and catalytic processes. His beamline responsibilities centered around developing experimental capabilities for high energy x-rays, including commission the then-newly received GE large-area detector, which is now a staple 40 cm square detector used at A2 and F2 (CHESS now owns two). At that time, it was clear that CHESS needed a good way to focus intense high-energy wiggler beams, like those available at A2 and F2, and that exploring, adopting and adapting designs in use at other laboratories was a high priority. Peter took on that challenge and developed a prototype double-Laue monochromator which he installed at the hard-bend B-line station for a test during the first CHESS undulator test in 2012.