Test-bench for characterization of steady state magnetic sensors parameters in wide temperature range

Kovařík, K.; Ďuran, I.; Sentkerestiová, J.; Šesták, D.

doi:10.1016/j.fusengdes.2013.02.150

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…The investigation was conducted in the Hall sensor laboratory of the Institute of Plasma Physics in Prague. The test rig consists of a single-axis Helmholtz coil assembly [5] powered by a programmable 20 kW current source. The Hall voltage was measured by a nanovoltmeter, and the temperature was measured with a set of platinum resistance temperature detectors.…”

Section: Methodsmentioning

confidence: 99%

Investigation of linearity of the ITER outer vessel steady-state magnetic field sensors at high temperature

et al. 2017

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A: Three vacuum vessel sectors in ITER will be instrumented by the outer vessel steadystate magnetic field sensors. Each sensor unit features a pair of metallic Hall sensors with a sensing layer made of bismuth to measure tangential and normal components of the local magnetic field. The influence of temperature and magnetic field on the Hall coefficient was tested for the temperature range from 25 to 250 • C and the magnetic field range from 0 to 0.5 T. A fit of the Hall coefficient normalized temperature function independent of magnetic field was found, and a model of the Hall coefficient functional dependence at a wide range of temperature and magnetic field was built with the purpose to simplify the calibration procedure. K: Plasma diagnostics -probes; Detector alignment and calibration methods (lasers, sources, particle-beams) 1Corresponding author.

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Section: Methodsmentioning

confidence: 99%

Investigation of linearity of the ITER outer vessel steady-state magnetic field sensors at high temperature

et al. 2017

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“…Figures 6(a) and (b) (see also [21,45,46]) show the design of the Cu Hall sensor and the manufactured sensor (respectively): In figure 6(a) the 'I' contacts are used for the input voltage (bias), while the 'U' contacts are used for the output voltage. The measurement of the sensitivity (in the range of 0.1-0.5 mV A / T −1 ) of these Hall sensors was carried out versus the thickness of the Cu sensing layer, and the results are shown in figure 7.…”

Section: For This Reason Hall Sensors Are Considered Where the Integrmentioning

confidence: 99%

“…The substrate of Al 2 O 3 was chosen for practical purposes: It suffers from a 0.1-0.3% swelling at a fluence of 10 24 neutron m −2 ; for the application in the DEMO environment a substrate of Si 3 N 4 can be a better choice since it is resistant to a fluence of 10 26 neutron m −2 Figures 6(a) and (b) (see also [21,45,46]) show the design of the Cu Hall sensor and the manufactured sensor (respectively): In figure 6(a) the 'I' contacts are used for the input voltage (bias), while the 'U' contacts are used for the output voltage. The measurement of the sensitivity (in the range of 0.1-0.5 mV A / T −1 ) of these Hall sensors was carried out versus the thickness of the Cu sensing layer, and the results are shown in figure 7.…”

Section: Magnetic Measurements For Equilibrium Reconstruc-mentioning

confidence: 99%

Diagnostics and control for the steady state and pulsed tokamak DEMO

Orsitto¹,

Villari²,

Moro³

et al. 2016

Nucl. Fusion

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The present paper is devoted to a first assessment of the DEMO diagnostics systems and controls in the context of pulsed and steady state reactor design under study in Europe. In particular, the main arguments treated are: (i) The quantities to be measured in DEMO and the requirements for the measurements; (ii) the present capability of the diagnostic and control technology, determining the most urgent gaps, and (iii) the program and strategy of the research and development (R&D) needed to fill the gaps. Burn control, magnetohydrodynamic stability, and basic machine protection require improvements to the ITER technology, and moderated efforts in R&D can be dedicated to infrared diagnostics (reflectometry, electron cyclotron emission, polarimetry) and neutron diagnostics. Metallic Hall sensors appear to be a promising candidate for magnetic measurements in the high neutron fluence and long/steady state discharges of DEMO.

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