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Sandra G. Biedron, Ph.D.

Dr. Sandra G. Biedron

Section Lead, Laser and Beam Physics
Argonne National Laboratory

Energy Systems Division
Bldg 200 L-135
9700 S Cass Ave
Argonne IL 60439-4803
United States

tel: 630 252 1162
fax: 630 252 5703
E-mail: biedron@engr.colostate.edu

Area of Expertise

Electron-beam-based light sources (synchrotrons, coherent radiators, and free-electron lasers)


Dr. Sandra G. Biedron is an Applied Physicist and Project Manager in the Energy Systems Division of Argonne National Laboratory (ANL), where she pursues novel beam source research as well as unique analytical tools for applications such as detection. Dr. Biedron is the Principal Investigator on projects totaling several million USD, and has worked at Argonne National Laboratory for 12 years. She obtained her Ph.D. in Accelerator Physics from the University of Lund in Sweden. Dr. Biedron has one patent; over 100 technical papers; and over fifty formal presentations, many as invited. Sandra is an active member of the IEEE, SPIE, and APS. Since 2004, she has chaired the SPIE Scholarships and Grants Committee. She is a Senior Member of the IEEE, and has served as a technical reviewer for a number of projects and organizations, including the CRDF (U.S. Civilian Research & Development Foundation) that assists the Former Soviet States, and the National Science Foundation.

Lecture Title(s)

Coherent Radiators Including Short-Wavelength, High-Gain, Single-Pass, Free-Electron Lasers and Associated Exotic Schemes
There is significant interest from the scientific community in producing sources of fully tunable, fully coherent electromagnetic radiation in nearly every wavelength regime - from the Terahertz (sub-mm) to the hard x-rays. Free-electron lasers and more generally coherent electron radiators offer this possibility. Exotic beam techniques including pre-bunching of electrons, non-linear harmonic generation, and multi-harmonic undulators serve to further expand the utility of said devices. Tunable bunch compression can increase the peak current of the electron bunch directly out of the electron gun. Nonlinear harmonic generation in the exponential gain regime, which is driven by bunching at the fundamental wavelength, may provide a path toward both enhancing and extending the usefulness of short-wavelength (sub-optical) free-electron laser (FEL) facility. Related "exotic" generation schemes, which exploit properties of harmonic production in various undulator topologies, have been discussed both in the past and more recently. Here, an overview of free-electron lasers and coherent radiators and their uses as well as the effect of more exotic schemes will be provided.
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