Design and Development of a Reduced Form-Factor High Accuracy Three-Axis Teslameter

Cassar, Johann; Sammut, Andrew; Sammut, Nicholas; Calvi, M.; Dimitrijevic, Sasa; Popović, R.S.

doi:10.3390/electronics8030368

Cited by 4 publications

(8 citation statements)

References 10 publications

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“…The developed instrument comprises interfacing circuitry to a 3-axes Hall probe using the spinning current modulation technique [4][5][6] explained in detail in Section 3 and further amplified in [7]. Each axis of the Hall probe is biased with a very high precision and temperature independent 2.5 mA current source.…”

Section: Architecture Of the Electronic Circuitrymentioning

confidence: 99%

“…The modulator then converts the analog input signal into a high-speed, pulse-wave representation. Further details of the implementation can be found in [7]. (1) = .…”

Section: Architecture Of the Electronic Circuitrymentioning

confidence: 99%

“…The offset fluctuation and drift were measured in the frequency bandwidth from 0.1 to 10 Hz, as explained in [7]. Table 5 shows the results of the noise obtained before low pass filtering to a 10 Hz bandwidth.…”

Section: Offset Fluctuation and Drift (01-10 Hz)mentioning

confidence: 99%

“…As clearly explained in [7,12], the digital filter in the delta-sigma ADC with a sinc 3 architecture introduces a time delay between the analog input and digital output. A breakdown of the delay is presented in Table 2 in [7].…”

Section: Phase Analysismentioning

confidence: 99%

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

Cassar

Sammut

et al. 2019

Electronics

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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 x 50 x 45 mm. Together with a 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.

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Section: Architecture Of the Electronic Circuitrymentioning

confidence: 99%

“…The modulator then converts the analog input signal into a high-speed, pulse-wave representation. Further details of the implementation can be found in [7]. (1) = .…”

Section: Architecture Of the Electronic Circuitrymentioning

confidence: 99%

Section: Offset Fluctuation and Drift (01-10 Hz)mentioning

confidence: 99%

Section: Phase Analysismentioning

confidence: 99%

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

Cassar

Sammut

et al. 2019

Electronics

Self Cite

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“…The magnetic measurement data is acquired through the new Three-axis Teslameter [8]. This instrument provides a fully integrated solution with an optimized analogue-to-digital conversion stage and a proper spinning current analogue readout circuit for the interfacing of a three-axes Hall probe sensor.…”

Section: Electronicsmentioning

confidence: 99%

Development of a new magnetic measurement bench for in-vacuum undulators

et al. 2019

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Magnetic measurement benches are used to measure the magnetic field profile of insertion devices such as undulators. A critical feature of these benches is the traversal of a measurement head such as a Hall probe through the undulator whilst keeping it perfectly centered, ensuring that the measurement obtained is not distorted by physical displacements of the probe during measurement. This paper presents a detailed novel design for a new magnetic measurement bench based on the SAFALI Hall probe positioning system, which facilitates the measurement as well as magnetic optimisation of the magnetic field from inside of a vacuum chamber. The paper gives a brief introduction to in-vacuum undulators and describes the new developments in the magnetic measurement bench. The design of the electronics involved in the bench is then explained, including the wireless communication systems used to operate the bench. The reproducibility of magnetic field measurements as well as the precision of the hall probe positioning are also discussed and presented.

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Analysis of the first magnetic results of the PSI APPLE X undulators in elliptical polarisation

Liang

Calvi

Couprie

et al. 2021

Nuclear Instruments and Methods in Physics Research Section A:

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Design and Development of a Reduced Form-Factor High Accuracy Three-Axis Teslameter

Cited by 4 publications

References 10 publications

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

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

Development of a new magnetic measurement bench for in-vacuum undulators

Analysis of the first magnetic results of the PSI APPLE X undulators in elliptical polarisation

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