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

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Faculty of Engineering, University of Malta, MSD 2080 Msida, Malta
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Faculty of ICT, University of Malta, MSD 2080 Msida, Malta
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Photon Science Division of the Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
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SENIS, Hertizentrum 11, 6300 Zug, Switzerland
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(11), 1230; https://doi.org/10.3390/electronics8111230
Received: 11 October 2019 / Revised: 22 October 2019 / Accepted: 25 October 2019 / Published: 28 October 2019
(This article belongs to the Section Microwave and Wireless Communications)
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. View Full-Text
Keywords: analog-to-digital conversion; ATHOS soft X-ray beamline; Hall probe; three-axis teslameter; undulator analog-to-digital conversion; ATHOS soft X-ray beamline; Hall probe; three-axis teslameter; undulator
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Cassar, J.; Sammut, A.; Sammut, N.; Calvi, M.; Spasic, S.; Popovic Renella, D. Performance Analysis of a Reduced Form-Factor High Accuracy Three-Axis Teslameter. Electronics 2019, 8, 1230.

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