First Measurements of a New Type of Coreless Cryogenic Current Comparators (4C) for Non-Destructive Intensity Diagnostics of Charged Particles

Tympel, Volker; Anders, Solveig; De Gersem, Herbert; Golm, Jessica; Haider, David; Kunert, Juergen; Marsic, Nicolas; Müller, Wolfgang; Schmelz, Matthias; Schmidl, Frank; Schwickert, Marcus; Schönau, Thomas; Seidel, Paul; Sieber, Thomas; Stapelfeld, Max; Stöhlker, Thomas; Stolz, Ronny; Tan, Jocelyn; Zakosarenko, Vyacheslav

doi:10.18429/JACoW-IBIC2019-MOPP008

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RIS citation export for MOPP008: First Measurements of a New Type of Coreless Cryogenic Current Comparators (4C) for Non-Destructive Intensity Diagnostics of Charged Particles

TY  - CONF
AU  - Tympel, V.
AU  - Anders, S.
AU  - De Gersem, H.
AU  - Golm, J.
AU  - Haider, D.M.
AU  - Kunert, J.
AU  - Marsic, N.
AU  - Müller, W.F.O.
AU  - Schmelz, M.
AU  - Schmidl, F.
AU  - Schwickert, M.
AU  - Schönau, T.
AU  - Seidel, P.
AU  - Sieber, T.
AU  - Stapelfeld, M.
AU  - Stolz, R.
AU  - Stöhlker, T.
AU  - Tan, J.
AU  - Zakosarenko, V.
ED  - Schaa, Volker RW
ED  - Jansson, Andreas
ED  - Shea, Thomas
ED  - Olander, Johan
TI  - First Measurements of a New Type of Coreless Cryogenic Current Comparators (4C) for Non-Destructive Intensity Diagnostics of Charged Particles
J2  - Proc. of IBIC2019, Malmö, Sweden, 08-12 September 2019
CY  - Malmö, Sweden
T2  - International Beam Instrumentation Conferenc
T3  - 8
LA  - english
AB  - The non-destructive and highly sensitive measurement of a charged particle beam is of utmost importance for modern particle accelerator facilities. A Cryogenic Current Comparator (CCC) can be used to measure beam currents in the nA-range. Therein, charged particles passing through a superconducting toroid induce screening currents at the surface of the toroid, which are measured via SQUIDs. Classical CCC beam monitors make use of a high magnetic permeability core as a flux-concentrator for the pickup coil. The core increases the pickup inductance and thus coupling to the beam, but unfortunately also raises low-frequency noise and thermal drift. In the new concept from the Leibniz Institute of Photonic Technology the Coreless Cryogenic Current Comparator (4C) completely omits this core and instead uses highly sensitive SQUIDs featuring sub-micron cross-type Josephson tunnel junctions. Combined with a new shielding geometry a compact and comparably lightweight design has been developed, which exhibits a current sensitivity of about 6 pA/sqrt(Hz) in the white noise region and a measured shielding factor of about 134 dB*.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 82
EP  - 84
KW  - pick-up
KW  - shielding
KW  - cryogenics
KW  - niobium
KW  - coupling
DA  - 2019/11
PY  - 2019
SN  - 2673-5350
SN  - 978-3-95450-204-2
DO  - doi:10.18429/JACoW-IBIC2019-MOPP008
UR  - http://jacow.org/ibic2019/papers/mopp008.pdf
ER  -