Reducing field emission in superconducting cavities with ozone

Roger Ruber

doi:10.1103/PhysRevAccelBeams.27.122001

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Reducing field emission in superconducting cavities with ozone

Roger Ruber

DOI 10.1103/PhysRevAccelBeams.27.122001 · Physical Review Accelerators and Beams

T1

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Abstract

Contaminations on the active surface of high-power microwave resonators, such as radio-frequency accelerator cavities, can greatly enlarge electron field emission and reduce their performance. In this work, we demonstrate the use of ozone to clean the surface of niobium superconducting radio-frequency cavities resulting in reduced field emission and enhanced accelerating gradient before onset of field emission. We report results from processing four cavities.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown