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Very High Efficiency X-ray FEL Oscillator

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-SC0018559
Agency Tracking Number: 243744
Amount: $999,551.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: 07a
Solicitation Number: DE-FOA-0001975
Solicitation Year: 2019
Award Year: 2019
Award Start Date (Proposal Award Date): 2019-05-28
Award End Date (Contract End Date): 2021-05-27
Small Business Information
1717 Stewart Street
Santa Monica, CA 90404-4021
United States
DUNS: 140789137
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Alex Murokh
 (310) 822-5845
Business Contact
 Alex Murokh
Phone: (310) 822-5845
Research Institution

X-ray Free Electron Laser in an Oscillator configuration (XFELO) offers significant advantages over single pass machines, including an enhanced spectral brightness and potentially improved output stability. However, a poor outcoupling efficiency of the X-ray optical resonators (< 4%), represents a significant practical limitation of the XFELO output in a low gain regime. In response to this problem, RadiaBeam Technologies and UCLA are proposing to develop an XFELO operating in a high gain regime, where a single pass FEL gain is sufficiently high to overcome optical cavity losses (a regime, similar to a regenerative amplifier FEL). A particularly promising approach is TESSA (Tapering Enhanced Stimulated Superradiant Amplification) oscillator configuration, where a strongly tapered undulator is embedded into the optical cavity, to combine high repetition rate, with the very high single pass efficiency and peak power. The main result of the Phase I activities is the development of a reliable time-dependent 3D simulation model for the planned experimental demonstration of the high frequency oscillator. In addition, we carried out a detailed planning for experimental proof-of-concept investigation of the TESSA oscillator at the UV wavelength, to be conducted in the Phase II. The Phase II project will be carried out at the Argonne National Laboratory LEA facility, where the existing 4 meters TESSA undulator, will be embedded inside the optical cavity in an oscillator configuration. In Year 1, a LEA photoinjector will be upgraded to achieve pulse train operations, and in Year 2 the entire oscillator system will be commissioned and optimized. Commercial Applications and Other Benefits: The FEL technology, hitherto developed for the research needs only, could also find numerous industrial applications, with improved cost efficiency, reliability and versatility. Towards that end, a successful implementation of the high gain TESSA oscillator, will open a path to high impact industrial FEL applications in lithography, nanoengineering, and directed energy.

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

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