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September 2012 Print

David Shuh, Senior Scientist, Chemical Sciences Division

 

09-2012-ring leader shuhFor the past decade, David Shuh has led one of the most in-demand beamlines at the ALS. In addition to his position as a Senior Scientist in Berkeley Lab’s Chemical Sciences Division (CSD), Shuh is Project Leader at ALS Beamline 11.0.2 , the Molecular Environmental Sciences (MES) Beamline, a leading national resource in the field of soft x-ray synchrotron radiation research. Research at the MES Beamline has provided some of the first significant molecular-level understandings of important chemical and physical processes taking place at interfaces under real or more realistic conditions than ever before possible.

Run by the LBNL CSD in partnership with the ALS, Shuh credits the MES Beamline’s popularity and success to multiple factors, a primary one being its initiation with a strong, innovative, and sufficiently developed scientific program proposed by the initial core research team members (Hendrik Bluhm-CSD, Mary K. Gilles-CSD, and Tolek Tyliszczak-ALS). Secondly, the needs of the scientific programs were expertly translated into a revolutionary general-purpose beamline operating from 75 eV to about 2100 eV downstream of an elliptical polarization undulator (EPU) and flagship endstations. The beamline construction team was led by Tony Warwick and they did a fabulous job including the development of a fantastic monochromator.

“The contributions and dedication of the core research team and the scientists at the MES Beamline have been key to the development of scientific programs, endstations, support of general users, and general user scientific programs,” says Shuh.

Shuh also notes that it was the strong and unwavering support of the U. S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, through the Divisions of Materials Science and Chemical Sciences, Geosciences, and Biosciences, that enabled the construction of the MES Beamline.

“The strong operational support provided early on from of the DOE’s Division of Chemical Sciences, Geosciences, and Biosciences served as a solid foundation for all the developments that have followed at the MES Beamline,” says Shuh. “And the partnership and support we’ve received from the ALS has also been key to our success.”

The MES Beamline Scanning Transmission X-Ray Microscope (STXM) endstation is a top worldwide resource for a diverse set of scientific investigations utilizing soft x-ray STXM. The endstation pair – the MES Ambient Pressure X-ray Photoelectron Spectroscopy (APXPS) endstations are leaders in surface studies of interfaces at pressures approaching 10 Torr for a wide range of energy research. Shuh notes that several other synchrotron radiation facilities have built similar beamlines and endstations, adding that “imitation is the highest form of flattery.”

The MES research team’s significant scientific diversity and history has also been a major contributor to the success of the beamline, says Shuh. Physicists Tolek Tyliszczak and Hendrik Bluhm, as well as chemist Mary K. Gilles, were all involved early on in the MES Beamline effort.

“The scientific diversity of the staff, their expertise, dedication, and years of experience are invaluable to the wide range of users at the MES Beamline and in general to the ALS as well,” says Shuh.

The MES Beamline scientists have been recognized over the years for their development of beamline endstation instrumentation. Tolek Tyliszczak has been awarded two ALS Klaus Halbach Awards for Innovative Instrumentation as part of two teams for STXM developments in 2002 and 2010. Similarly, Hendrik Bluhm was part of a team awarded a Halbach Award in 2004 and an R&D 100 Award in 2010 for the development of ambient pressure photoelectron spectroscopy.

Shuh and the MES team have seen many accomplishments over the years at the MES Beamline – he notes that they’ve had a tremendous impact in magnetic dynamics, the development and use of in-situ reaction cells for science in the soft x-ray regime, environmental science, and a significant impact on realistic catalysis and interfacial science across the board.

In addition to his role at the MES Beamline, Shuh is the Director of the Glenn T. Seaborg Center and is a co-lead on the Berkeley Lab Critical Materials Initiative. Shuh, along with Frances Houle (CSD), will work toward reducing current shortages and preventing future shortages through advances in nanoscience, chemistry, materials science, computation and theory, physics, materials genomics, and energy analysis techniques. The project will make use of Department of Energy national user facilities located throughout the country.