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Long-term operation of niobium superconducting resonators in the Argonne heavy-ion linac

K.W. Shepard-1984-01-01-University of North Texas Digital Library (University of North Texas)
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This paper describes some of the effects observed in operating superconducting resonators over long periods of time at high field levels. The resonators are the niobium split-ring resonators which form the Argonne superconducting heavy-ion linac, and the period of operation considered extends from initial operation in 1978 to the present and includes more than 17,000 hours of operation with beam. In what follows, first a brief description of the resonators and operating procedures is given. Then, the on-line performance of all the resonators in one cryostat module over a period of several years is reviewed and discussed. Finally, the nature and causes of performance degradation in several (atypical) resonators are examined.

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This paper describes some of the effects observed in operating superconducting resonators over long periods of time at high field levels. The resonators are the niobium split-ring resonators which form the Argonne superconducting heavy-ion linac, and the period of operation considered extends from initial operation in 1978 to the present and includes more than 17,000 hours of operation with beam. In what follows, first a brief description of the resonators and operating procedures is given. Then, the on-line performance of all the resonators in one cryostat module over a period of several years is reviewed and discussed. Finally, the nature and causes of performance degradation in several (atypical) resonators are examined.

Keywords

Linear particle acceleratorHeavy ionNiobiumNational laboratoryNuclear physicsResonatorPhysicsNuclear engineering

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