USA flag logo/image

An Official Website of the United States Government

Development of a Superconducting RF Multi-Spoke Cavity for Compact Light Sources

Award Information

Department of Energy
Award ID:
Program Year/Program:
2012 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
15 b
Solicitation Number:
Small Business Information
Niowave, Inc.
1012 N. Walnut Street Lansing, MI 48906-5061
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: Yes
Phase 2
Fiscal Year: 2012
Title: Development of a Superconducting RF Multi-Spoke Cavity for Compact Light Sources
Agency: DOE
Contract: DE-FG02-11ER90121
Award Amount: $1,000,000.00


Superconducting radio frequency (SRF) accelerating cavities are being successfully used for acceleration of electron beams worldwide. The use of superconducting structures helps maximize the accelerating gradient, which is a highly desirable trait for applications involving linear accelerators or storage rings. Application of todays multi-spoke accelerating structures in future SRF electron linacs and synchrotrons will allow a further reduction in the overall size of acceleration sections without compromising its performance. Compact accelerators utilizing SRF cavities can be successfully used in the broad range of applications from x-rays machines for cancer therapy and sterilization, to tunable x-ray and gamma sources, to high energy electron accelerators and colliders. This SBIR proposal will develop a design of the 700 MHz superconducting multi-spoke cavity capable of accelerating electrons. In addition to building a cavity and associated cryomodule, Niowave will integrate a 5 watt cryocooler with the spoke cryomodule, resulting in a stand-alone spoke cavity based accelerating system operating at 4 K. Phase I demonstrated the technical feasibility of the project by completing the preliminary cavity and cryomodule designs. Phase II will finalize both designs, then fabricate and test the SRF multi-spoke cavity in the cryomodule. The cavity is designed to operate at 700 MHz and is capable of differential acceleration of electrons by ~12.5 MeV with electric and magnetic surface fields no more than ~46.7 MV/m and ~79.8 mT respectively. The integrated cryocooler system operates at 4 K. The cryogenic load can be significantly reduced by operating in a pulsed mode or by reducing the overall accelerating voltage.

Principal Investigator:

Terry L Grimm

Business Contact:

Jerry Hollister
Small Business Information at Submission:

Niowave, Inc.
1012 N. Walnut St. Lansing, MI -

EIN/Tax ID: 030579926
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: Yes