Development of a Superconducting RF Crabbing System based on a Quarter Wave Resonator for Ultrashort Pulses at Light Sources

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$150,000.00
Award Year:
2012
Program:
SBIR
Phase:
Phase I
Contract:
DE-FG02-12ER90257
Award Id:
n/a
Agency Tracking Number:
98793
Solicitation Year:
2012
Solicitation Topic Code:
10 c
Solicitation Number:
DE-FOA-0000577
Small Business Information
1012 N. Walnut St., Lansing, MI, -
Hubzone Owned:
Y
Minority Owned:
N
Woman Owned:
N
Duns:
621290001
Principal Investigator:
ChaseBoulware
Dr.
(803) 840-2303
boulware@niowaveinc.com
Business Contact:
JerryHollister
Dr.
(517) 230-7417
hollister@niowaveinc.com
Research Institute:
Stub




Abstract
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.

* information listed above is at the time of submission.

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