title: Dark current measurements on a superconducting cavity using a cryogenic current comparator.
abstract: This paper presents nondestructive dark current measurements of tera electron volt energy superconducting linear accelerator cavities. The measurements were carried out in an extremely noisy accelerator environment using a low temperature dc superconducting quantum interference device based cryogenic current comparator. The overall current sensitivity under these rough conditions was measured to be 0.2 nA/Hz(1/2), which enables the detection of dark currents of 5 nA.
authors.affiliation: Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Germany. rene.geithner@uni-jena.de
authors.forename: R
authors.initials: R
authors.lastname: Geithner
authors.forename: R
authors.initials: R
authors.lastname: Neubert
authors.forename: W
authors.initials: W
authors.lastname: Vodel
authors.forename: P
authors.initials: P
authors.lastname: Seidel
authors.forename: K
authors.initials: K
authors.lastname: Knaack
authors.forename: S
authors.initials: S
authors.lastname: Vilcins
authors.forename: K
authors.initials: K
authors.lastname: Wittenburg
authors.forename: O
authors.initials: O
authors.lastname: Kugeler
authors.forename: J
authors.initials: J
authors.lastname: Knobloch