American Physical Society, Topical Group on Instrumentation and Measurement Science
(APS GIMS) Colloquium
Friday, June 11, 2021, 3 pm EDT
This GIMS colloquium will be on instrumentation at LCLS, the free-electron laser at SLAC. The colloquium will have two half-hour talks, with the first one given by Paul Fuoss and the second given by Peter Walter.
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Paul Fuoss, SLAC: "The Evolution of LCLS Capabilities: Two Undulators + Two Accelerators + New Instruments = Scientific Opportunities"
Fuoss abstract: In April of 2009 the Linac Coherent Light Source (LCLS) had first light and became the world’s first hard x-ray free electron laser. Now, twelve years and hundreds of experiments later, an upgraded LCLS has just completed a successful run with two new undulators, one targeted at measurements utilizing soft x-rays and the second providing hard x-rays up to 25 keV. The installation of the new LCLS-II 4 GeV superconducting accelerator that will provide high repetition rate soft x-ray pulses is in its final stages. Plans are finished for an accelerator energy upgrade to 8 GeV, LCLS-II-HE, that will provide high rep-rate hard x-rays. Instruments to exploit the extreme performance of LCLS-II are being built and new hard x-ray instruments for LCLS-II-HE are being designed. I will provide an overview of the rapidly evolving LCLS performance and highlight some of scientific opportunities enabled by the LCLS upgrade.
Fuoss bio: Paul Fuoss joined the SLAC National Accelerator Laboratory staff in 2017 where he is a Distinguished Scientist and Head of Experimental Design for the Linac Coherent Light Source (LCLS). After earning a B.S. in Physics from the South Dakota School of Mines and Technology in 1975, and a Ph.D. in Materials Science from Stanford University in 1980, he joined the staff of Bell Laboratories. In 2002, he moved to Argonne National Laboratory where he led the Synchrotron Radiation Studies group in ANL’s Materials Science Division from 2010 to 2017. His research has focused on the structure and dynamics of amorphous materials, in situ x-ray analysis of materials processes, ultra-fast x-ray science, and coherent x-ray scattering techniques.
Peter Walter, SLAC: "The TMO Instrument: Opportunities, First Results, and Plans for Time-resolved Atomic, Molecular and Optical Science at LCLS-II"
Walter abstract: The new designed Time-resolved Atomic, Molecular and Optical Science end station, will be configured to take full advantage of both the high per pulse energy from the copper accelerator (120 Hz) as well as high average intensity and high repetition rate (1 MHz) from the superconducting accelerator. TMO will support many experimental techniques not currently available at LCLS and will have two X-ray beam focus spots. Thereby, TMO will support AMO science, strong-field and nonlinear science and a new dynamic reaction microscope. We would like to present some of the important science opportunities, new capabilities and instrumentation being planned and conducted at NEH 1.1 (TMO) at LCSL-II.
Walter bio: Peter Walter studied Engineering Physics in Berlin (2009). And he went to PETRA III@DESY in Hamburg for his Ph.D. and Postdoc (2009-2016). In his time at DESY he work in the Group of Jens Viefhaus at the P04 Beamline in the field AMO Physics and received his Ph.D. from the RWTH-University in Aachen in Engineering Physics as an external Ph.D. candidate. He joined SLAC in 2016 as a research associate and was promoted to the role as TMO’s lead scientist in 2017. He and his team designed and operate the new TMO endstation at LCLS II.
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