Raising gradient limitations in 2.1 GHz superconducting photonic band gap accelerator cavities

Journal Article · Mon Jun 16 04:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4884428· OSTI ID:22299907

Arsenyev, Sergey A.; Haynes, W. Brian; Shchegolkov, Dmitry Yu.; Suvorova, Natalya A.; Tajima, Tsuyoshi ^[1]; Boulware, Chase H.; Grimm, Terry L. ^[2]

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1. Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545 (United States)
2. Niowave, Inc., 1012 North Walnut Street, Lansing, Michigan 48906 (United States)

We report results from recent 2.1 GHz superconducting radio frequency (SRF) photonic band gap (PBG) resonator experiments at Los Alamos. Two 2.1 GHz PBG cells with elliptical rods were fabricated and tested at high power in a liquid helium bath at the temperatures of 4 K and below 2 K. The described SRF PBG cells were designed with a particular emphasis on changing the shape of the PBG rods to reduce peak surface magnetic fields and at the same time to preserve its effectiveness at damping higher-order-modes. The superconducting PBG cavities have great potential for damping long-range wakefields in SRF accelerator structures without affecting the fundamental accelerating mode. The cells performed in accordance with simulation's predictions and the maximum achieved accelerating gradient was 18.3 MV/m. This represents a 30% increase over gradients previously demonstrated in superconducting PBG cavities with round rods.

• OSTI ID: 22299907
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 24 Vol. 104; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACCELERATORS
CAVITY RESONATORS
FORECASTING
GHZ RANGE
HELIUM
MAGNETIC FIELDS
RADIOWAVE RADIATION
RESONATORS
SIMULATION
SUPERCONDUCTIVITY
SURFACES