Speaker
Description
The ISOLDE Superconducting Recoil Separator (ISRS)[1] under development at CERN aims to achieve unprecedented mass resolution and transmission efficiency through a compact, Fixed Field Alternating Gradient (FFAG) storage ring composed of Canted Cosine Theta (CCT) multifunction superconducting magnets. Each MAGDEM prototype integrates combined dipole and quadrupole fields within a cryogen-free architecture, representing a critical milestone in the ISRS magnet technology program. To experimentally validate its electromagnetic performance, a dedicated 3D Magnetic Field Scanner System (MFSS) has been designed at the University of Huelva.
The MFSS combines a computer-controlled positioning system with a HallinSight® 32×2-pixel 3D Hall sensor array, achieving sub-millimeter spatial resolution (1 mm step, 0.05 mm precision) and magnetic sensitivity better than 100 µT. The integrated software suite provides automated motion control, synchronized data acquisition, and real-time comparison with COMSOL-based field simulations. The system demonstrates alignment precision below 1.9 mrad and calibration accuracy of 0.2% for a 15 mT reference field.
Preliminary mapping results confirm excellent agreement between measured and simulated fields, consistent with the quench-protection design studies. This successful implementation establishes the MFSS as an essential diagnostic platform for field verification, calibration, and quality assurance of future ISRS superconducting elements and test-bench installations at ISOLDE.
References
[1] ISRS website: http://www.uhu.es/isrs
