Numerical analysis of a folded superconducting coaxial shield for cryogenic current comparators

in: Nuclear Instruments and Methods in Physics Research Section A-Accelerators, Spectrometers, Detectors and Associated Equipment (2019)
Marsic, Nicolas; Müller, Wolfgang F. O.; De Gersem, H. ; Schmelz, Matthias; Stolz, Ronny; Kurian, Febin; Sieber, Thomas; Schwickert, Marcus; Zakosarenko, Vyacheslav
This paper presents a new shield configuration for cryogenic current comparators (CCCs), namely the folded coaxial geometry. An analytical model describing its shielding performance is developed first, and then validated by means of finite element simulations. Thanks to this model, the fundamental properties of the new shield are highlighted. Additionally, this paper compares the volumetric performance of the folded coaxial shield to the one of a ring shield, the latter being installed in many CCCs for measuring particle beam currents in accelerator facilities.

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