USA flag logo/image

An Official Website of the United States Government

Development of a Superconducting RF Crabbing System based on a Quarter Wave…

Award Information

Department of Energy
Award ID:
Program Year/Program:
2012 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
10 c
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 1
Fiscal Year: 2012
Title: Development of a Superconducting RF Crabbing System based on a Quarter Wave Resonator for Ultrashort Pulses at Light Sources
Agency: DOE
Contract: DE-FG02-12ER90257
Award Amount: $150,000.00


Many lines of research currently ongoing at storage ring light sources would benefit from intense, tunable, few picoseconds x-ray pulses for time-domain experiments. The use of a deflecting cavity has several advantages over other proposals to produce these pulses. A crab cavity does not accelerate the bunch, but instead deflects the head of the bunch relative to the tail. This kind of chirp in the transverse momentum imposes an angle-time correlation on the light emitted from the undulator that can be used for time-domain experiments or manipulated with proper x-ray optics to produce ps-scale x-ray pulses. This SBIR proposal seeks to develop a superconducting crab cavity for this use in light sources. Here, a quarter-wave geometry is proposed that operates in the fundamental resonant mode, unlike the more conventional elliptical cavities that have been used for this application, which operate on a higher-order mode and require dampers for the fundamental mode. Further, the quarter-wave geometry has a very different spectrum of higher-order modes than elliptical shapes. Taking advantage of this sparse mode spectrum, an innovative design is proposed with a large beam pipe to allow all higher-order modes to propagate to absorbers at room temperature outside the cryomodule. The quarter wave structure is also efficient and compact, often relevant considerations for crabbing cavities.

Principal Investigator:

Chase Boulware

Business Contact:

Jerry L. 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