Dark Current Measurements on a Superconducting Cavity using a Cryogenic Current Comparator

• Main Authors: Geithner, R, Neubert, R, Vodel, W, Seidel, P, Knaack, K, Vilcins, S, Wittenburg, K, Kugeler, O, Knobloch, J
• Format: Journal Article
• Language: English
• Published: 29-07-2010
• Subjects: Physics - Instrumentation and Detectors
• DOI: 10.48550/arxiv.1007.5184

This paper presents non-destructive dark current measurements of
superconducting TESLA cavities for superconducting LINACs. The measurements
were carried out in a highly disturbed accelerator environment using a low
temperature superconducting d.c. SQUID based Cryogenic Current Comparator
(CCC). The overall current sensitivity under these rough conditions was
measured to be 0.2 nA/sqrt(Hz) which enables the detection of dark currents of
5 nA.