Würzburg 2018 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 8: Poster session
AKBP 8.21: Poster
Mittwoch, 21. März 2018, 18:00–19:30, NW-Bau - HS2
Beam intensity measurement with nA precision - the Cryogenic Current Comparator (CCC) — •David Haider1, Thomas Sieber1, Febin Kurian1, Peter Forck1, Marcus Schwickert1, Frank Schmidl2, Peter Seidel2, Ralf Neubert2, Jessica Golm2,3, Volker Tympel3, Nicolas Marsic4, Herbert De Gersem4, Matthias Schmelz5, Ronny Stolz5, Viatcheslav Zakosarenko6, and Thomas Stöhlker1,2,3 — 1GSI Helmholz Centre for Heavy Ion Research, Darmstadt, Germany — 2Friedrich-Schiller-University Jena, Germany — 3Helmholtz-Institute Jena, Germany — 4TU Darmstadt, Germany — 5Leibniz Institute of Photonic Technology, Jena, Germany — 6Supracon AG, Jena, Germany
The storage of low current beams and the slow extraction of ion beams at FAIR bring new demands for a non-destructive beam intensity monitoring of nA currents. To address this requirement, the concept of a Cryogenic Current Comparator (CCC) using a low temperature SQUID sensor has been adapted to form an extremely sensitive beam current transformer. Such CCCs were installed successfully in the extraction line of GSI SIS18 (2014) and - as the first stand-alone device - in the CERN Antiproton Decelerator (2017). Currently, the next generation of CCCs is being designed as a routine diagnostic system for FAIR and will be tested in CRYRING at GSI. The challenge of the ongoing research is to improve the robustness against external interference, based on electro-mechanical studies, and to optimize the design of each component accordingly. In this contribution, recent results and future developments of the FAIR-CCC are discussed.