Short-Period RF Undulator for a SASE Nanometer Source

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG02-10ER85868
Agency Tracking Number: 95672
Amount: $100,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2010
Solicitation Year: 2010
Solicitation Topic Code: 15 c
Solicitation Number: DE-FOA-0000161
Small Business Information
258 Bradley St., 2nd fl., New Haven, CT, 06510
DUNS: 084736651
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Jay Hirshfield
 (203) 789-1164
Business Contact
 George Trahan
Title: Dr.
Phone: (203) 789-1165
Research Institution
For future compact light sources for discovery science and medical diagnostics, it would be beneficial to reduce the energy of the electron beam constituting the source. For nanometer wavelength radiation, the radiation would be Self-Amplified Spontaneous Emission (SASE), originating when the beam undulates in a periodic transverse magnetic field. For a given radiation wavelength, reducing the undulator period allows a concomitant reduction in the beam energy. But practical limits prevent arbitrary reductions in the period for a static undulator. However, an electromagnetic undulator does not encounter those limits. This project is aimed at design that uses cavities energized with high-power 34-GHz radiation to create an undulator with a period less than 1 cm, with an undulator parameter of the order of unity, and with an aperture (or gap) greater than 2.25 mm. Cavities are to be devised that can support the strong electromagnetic fields needed for this application, and which lend themselves to cascading for realizing an undulator several meters in length. Commercial applications and other benefits: Present light sources that generate nanometer-scale radiation are large, expensive, and located at only a few national laboratories in the US. If such sources were made less expensive and smaller, by reduction in the energy of the electron beam needed through use of an undulator developed in this project, it could make it possible to install the sources at regional centers where they would be more widely available than at present. Medical and industrial uses for these nanometer light sources could generate an annual market of many millions of dollars that in turn would create a large demand for the new undulators.

* Information listed above is at the time of submission. *

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