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| Title | Analytical and Numerical Performance Analysis of a Cryogenic Current Comparator | |||||
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| Abstract | Nowadays, cryogenic current comparators (CCCs) are among the most accurate devices for measuring extremely small electric currents. Probably the most interesting property of this equipment, is the excellent position independence of the current passing through it. This feature motivated the use of CCCs for beam instrumentation in particle accelerators. A typical CCC consists of a ferrite core, a pick-up coil, a superconducting quantum interference device, appropriate electronics and superconducting shielding consisting of a meander structure. This configuration offers a strong attenuation for all the magnetic field components, except for the azimuthal one. Thus, high precision measurements of extremely low beam currents are made possible. The damping performance of this device is analysed in this work. A 3D finite element (FE) analysis has been carried out and the computed results were compared to an analytical model*. Furthermore, in order to reduce the computation time, a 2.5D FE model is also proposed and discussed. | |||||
| Footnotes & References | * K. Grohmann et al., Field attenuation as the underlying principle of cryo-current comparators 2. Ring cavity elements, Cryogenics, vol. 16, no. 10, pp. 601-605, 1976. |
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| Funding | This research is funded by the German Bundesministerium für Bildung und Forschung as the project BMBF-05P15RDRBB Ultra-Sensitive Strahlstrommessung für zukünftige Beschleunigeranlagen. | |||||
| Paper | download MOPAB037.PDF [0.152 MB / 3 pages] | |||||
| Export | download ※ BibTeX ※ LaTeX ※ Text/Word ※ RIS ※ EndNote | |||||
| Conference | IPAC2017, Copenhagen, Denmark | |||||
| Series | International Particle Accelerator Conference (8th) | |||||
| Proceedings | Link to full IPAC2017 Proccedings | |||||
| Session | Posters Monday 1 | |||||
| Date | 15-May-17 16:00–18:00 | |||||
| Main Classification | 06 Beam Instrumentation, Controls, Feedback and Operational Aspects | |||||
| Sub Classification | T03 Beam Diagnostics and Instrumentation | |||||
| Keywords | damping, cryogenics, dipole, simulation, beam-diagnostic | |||||
| Publisher | JACoW, Geneva, Switzerland | |||||
| Editors | Volker RW Schaa (GSI, Darmstadt, Germany); Gianluigi Arduini (CERN, Geneva, Switzerland); Juliana Pranke (ESS, Lund, Sweden); Mike Seidel (PSI, Villigen, Switzerland); Mats Lindroos (ESS, Lund, Sweden) | |||||
| ISBN | 978-3-95450-182-3 | |||||
| Published | May 2017 | |||||
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