Contribution to a conference proceedings/Contribution to a book

GSI-2017-01773

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The Next Generation of Cryogenic Current Comparators for Beam Monitoring

Tympel, V. (Corresponding author) ; Golm, J. ; Neubert, R. ; Seidel, P. ; Schmelz, M. ; Stolz, R. ; Zakosarenko, V. ; Kurian, F.GSI* ; Schwickert, M.GSI* ; Sieber, T.GSI* ; Stöhlker, T.GSI*

2017
[CERN] [Genf]
ISBN: 978-3-95450-177-9

Abstract: A new Cryogenic Current Comparator with eXtendedDimensions (CCC-XD), compared to earlier versions builtfor GSI, is currently under development for a non-destructive,highly-sensitive monitoring of nA-intensities ofbeams for larger beamline diameters planned for the newFAIR accelerator facility at GSI. The CCC consists of a:1) flux concentrator,2) superconducting shield against external magneticfield and a3) superconducting toroidal coil of niobium which isread out by a4) Superconducting Quantum Interference Device(SQUID).The new flux concentrator (1) comprises a specially designedhighly-permeable core made of nano-crystallinematerial, in order to assure low-noise operation with highsystem bandwidth of up to 200 kHz. The superconductingshielding of niobium (2) is extended in its geometric dimensionscompared to the predecessor CCC and thus willsuppress (better -200 dB) disturbing magnetic fields of thebeamline environment more effectively. For the CCD-XDreadout, new SQUID sensors (4) with sub-μm Josephsonjunctions are used which enable the lowest possible noiselimitedcurrent resolution in combination with a good suppressionof external disturbances.The CCC-XD system, together with a new dedicated cryostat,will be ready for testing in the CRYRING at GSI inspring 2017. For the application of a CCC in the antiprotonstorage ring at CERN a pulse shape correction has been developedand tested in parallel. Results from electricalmeasurements of two components (1 and 4) of the newCCC-XD setup will be presented in this work.

Keyword(s): Teilchenbeschleuniger ; Geladenes Teilchen ; Strahlüberwachung

Note: Literaturangaben; "Proceedings of the 5th International Beam Instrumentation Conference" - Einstiegsseite (JACoW.org); English

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Contributing Institute(s):

1. Atomphysik (ATP)
2. HI Jena (HIJ)
3. Beam Diagnostics (BEA)

Research Program(s):

1. 6211 - Extreme States of Matter: From Cold Ions to Hot Plasmas (POF3-621) (POF3-621)

Appears in the scientific report 2017

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