Performance Analysis of a Reduced Form-Factor High Accuracy Three-Axis Teslameter

Electronics

Johann Cassar¹  Andrew Sammut¹  Nicholas Sammut²  Marco Calvi³  Sasa Spasic⁴  Dragana Popovic Renella⁴ 

[1] Faculty of Engineering, University of Malta, MSD 2080 Msida, Malta;Faculty of ICT, University of Malta, MSD 2080 Msida, Malta;Photon Science Division of the Paul Scherrer Institute, 5232 Villigen PSI, Switzerland;SENIS, Hertizentrum 11, 6300 Zug, Switzerland;

关键词: analog-to-digital conversion;    athos soft x-ray beamline;    hall probe;    three-axis teslameter;    undulator;   

DOI  :  10.3390/electronics8111230

来源: DOAJ

【 摘 要 】

In the framework of the SwissFEL project at the Paul Scherrer Institute (PSI), a Hall probe bench is being developed for the high-precision magnetic characterization of the insertion devices for the ATHOS soft X-ray beamline. For this purpose, a novel three-axis teslameter has been developed, which will be placed between the undulator and its outer shell in a very limited volumetric space of 150 × 50 × 45 mm. Together with a SENIS^® 3-axis Hall probe at the center of the cross sectional area of the undulator, the setup will traverse along the undulator length on a specifically designed rig with minimal vibrations. This teslameter has all the analog signal conditioning circuitry for the Hall probe and also has on board 24-bit digitization. The instrument also handles an interface to a linear absolute encoder. The old instrumentation used only had analog signal conditioning circuitry whilst digitization was done off board. The new instrument also provides a very accurate magnetic field map in the µT range with simultaneous readings from the position encoder at an accuracy of ±3 µm. In this paper, a series of tests are described, which were performed at PSI in order to establish the measuring precision and repeatability of the instrument.

【 授权许可】

Unknown