Advanced User Interface Generation in the Software Framework for Magnetic Measurements at Cern

Abstract

A model-based approach, the Model-View-Interactor Paradigm, for automatic generation of user interfaces in software frameworks for measurement systems is proposed. The Model-View-Interactor Paradigm is focused on the "interaction" typical in a software framework for measurement applications: the final user interacts with the automatic measurement system executing a suitable high-level script previously written by a test engineer. According to the main design goal of frameworks, the proposed approach allows the user interfaces to be separated easily from the application logic for enhancing the flexibility and reusability of the software. As a practical case study, this approach has been applied to the flexible software framework for magnetic measurements at the European Organization for Nuclear research (CERN). In particular, experimental results about the scenario of permeability measurements are reported.

Multipole correction of stretched-wire measurements of field-gradients in quadrupole accelerator magnets

“…The wire is passed through the magnet aperture and kept taut by means of a motor. A Fast Digital Integrator (FDI) [7] is used to acquire the voltage signal.…”

“…Coils mounted on a support shaft, driven by a motor/encoder unit, deliver voltage signals proportional to the magnetic field. As the coil rotates, a digital integrator records the magnetic flux increments, related to the angular position of the coil by an the encoder [7]. The accuracy of the higher harmonics is improved by a compensated (bucked) coil configuration for rejecting effects of geometrical imperfections.…”