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Development of High-Q SRF Structures by Nitrogen Doping for Superconducting Electron Linacs

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-SC0017734
Agency Tracking Number: 230036
Amount: $150,000.00
Phase: Phase I
Program: STTR
Solicitation Topic Code: 29j
Solicitation Number: DE-FOA-0001619
Solicitation Year: 2017
Award Year: 2017
Award Start Date (Proposal Award Date): 2017-06-12
Award End Date (Contract End Date): 2018-03-11
Small Business Information
1012 N. Walnut Street
Lansing, MI 48906-5061
United States
DUNS: 621290001
HUBZone Owned: Yes
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Chase Boulware
 (517) 999-3475
Business Contact
 Jerry Hollister
Phone: (517) 999-3475
Research Institution
 Fermi National Accelerator Laboratory
 Sergey Belomestnykh
PO Box 500
Batavia, IL 60510-5011
United States

 (630) 840-5015
 Federally Funded R&D Center (FFRDC)

One of the most exciting recent developments in superconducting RF technology has been the discovery of a nitrogen-doping process which can reliably increase the superconducting quality factor of niobium resonators well above 1010 at high frequency (>1 GHz). This process is now well demonstrated in particular for TESLA-style 9-cell cavities at 1.3 GHz. Nitrogen doping is part of the plan for the production of the cavities for LCLS-II, significantly increasing the cryogenic efficiency of the machine, and allowing significant capital cost reductions. This STTR proposal will expand the application of nitrogen doping to the low-frequency regime. Niowave is currently developing commercial superconducting electron linacs for a number of important applications including high-power free-electron lasers, the production of medical and industrial radioisotopes, materials processing, sterilization, and cargo scanning applications. These systems typically operate at 350 MHz, but at 4 Kelvin operating temperature, where reduction of BCS losses would be an important efficiency enhancement. Pushing commercial linacs into a regime where a small cryocooler could provide for the cryogenic load of the accelerating cavity would have a huge impact. In this project, Niowave would send a 350-MHz niobium resonator to Fermilab for nitrogen doping and a vertical test to demonstrate high quality factor. The collaboration would then proceed toward a full accelerator demonstration with beam, which would demonstrate the preservation of the high-quality factor through the cryomodule installation, coupler installation, and operation with high-power electron beam.

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

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