V. Zakosarenko,
M. Schmelz,
T. Schönau,
S. Anders,
J. Kunert,
V. Tympel,
R. Neubert,
F. Schmidl,
P. Seidel,
T. Stöhlker,
D. Haider,
M. Schwickert,
T. Sieber,
and R. Stolz
Coreless SQUID-based cryogenic current comparator for non-destructive intensity diagnostics of charged particle beams
Supercond. Sci. Technol., 32 :014002 (January 2019)
Coreless SQUID-based cryogenic current comparator for non-destructive intensity diagnostics of charged particle beams
Supercond. Sci. Technol., 32 :014002 (January 2019)
Abstract:
We report on a novel concept and prototype development of a coreless SQUID-based charged-particle beam monitor as a non-destructive diagnostic tool for accelerator facilities. Omitting the typically used pickup coil with a high magnetic permeability core leads to a significant improvement in low-frequency noise performance. Moreover, a revised shielding geometry allows for very compact and rather lightweight device designs. Based on highly sensitive SQUIDs featuring sub-micron cross-type Josephson tunnel junctions, our prototype device exhibits a current sensitivity of about 6 pA Hz(-1/2) in the white noise region. Together with a measured shielding factor of about 135 dB this opens up the way for its widespread use in modern accelerator facilities.