Plasma current measurement at JET using polarimetry-based fibre optic current sensor

Willem Leysen; Andrei Goussarov; Marc Wuilpart; Nicolas P.S. Beaumont; Alexandru Boboc; David Croft; Nicolas Bekris; Paola Batistoni; null JET Contibutors

doi:10.1016/j.fusengdes.2020.111754

Plasma current measurement at JET using polarimetry-based fibre optic current sensor

Willem Leysen, Andrei Goussarov, Marc Wuilpart, Nicolas P.S. Beaumont, Alexandru Boboc, David Croft, Nicolas Bekris, Paola Batistoni, JET Contibutors

Nuclear Engineering Office

Research output › peer-review

Abstract

The ITER Fibre Optic Current Sensor (FOCS) is a dc coupled current measurement system that will provide back-up ITER plasma current measurements using a sensing fibre located on the outer surface of the vacuum vessel. To address the impact of a harsh tokamak environment on the sensor performance we installed a FOCS system on JET and performed current measurements in various machine operating scenarios for currents up to 3 MA. Me have observed a good agreement between the FOCS and the reference Continuous External Rogowski (CER) coils data. The linearity of the FOCS response was demonstrated. The FOCS has performance characteristics compatible with the ITER requirements and in contrast to the CER is non-sensitive to magnetic crosstalk effects.

Original language	English
Article number	111754
Pages (from-to)	1-10
Number of pages	10
Journal	Fusion Engineering & Design
Volume	160
DOIs	https://doi.org/10.1016/j.fusengdes.2020.111754
State	Published - Nov 2020

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Cite this

@article{49dd0fd8fad54cc4b8ba96605177bd12,

title = "Plasma current measurement at JET using polarimetry-based fibre optic current sensor",

abstract = "The ITER Fibre Optic Current Sensor (FOCS) is a dc coupled current measurement system that will provide back-up ITER plasma current measurements using a sensing fibre located on the outer surface of the vacuum vessel. To address the impact of a harsh tokamak environment on the sensor performance we installed a FOCS system on JET and performed current measurements in various machine operating scenarios for currents up to 3 MA. Me have observed a good agreement between the FOCS and the reference Continuous External Rogowski (CER) coils data. The linearity of the FOCS response was demonstrated. The FOCS has performance characteristics compatible with the ITER requirements and in contrast to the CER is non-sensitive to magnetic crosstalk effects.",

keywords = "JET, ITER magnetic diagnostics, Plasma current measurements, Fibre optic current sensor, Faraday effect, Radiation effects",

author = "Willem Leysen and Andrei Goussarov and Marc Wuilpart and Beaumont, {Nicolas P.S.} and Alexandru Boboc and David Croft and Nicolas Bekris and Paola Batistoni and {JET Contibutors}",

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year = "2020",

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doi = "10.1016/j.fusengdes.2020.111754",

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TY - JOUR

T1 - Plasma current measurement at JET using polarimetry-based fibre optic current sensor

AU - Leysen, Willem

AU - Goussarov, Andrei

AU - Wuilpart, Marc

AU - Beaumont, Nicolas P.S.

AU - Boboc, Alexandru

AU - Croft, David

AU - Bekris, Nicolas

AU - Batistoni, Paola

AU - JET Contibutors, null

N1 - Score=10

PY - 2020/11

Y1 - 2020/11

N2 - The ITER Fibre Optic Current Sensor (FOCS) is a dc coupled current measurement system that will provide back-up ITER plasma current measurements using a sensing fibre located on the outer surface of the vacuum vessel. To address the impact of a harsh tokamak environment on the sensor performance we installed a FOCS system on JET and performed current measurements in various machine operating scenarios for currents up to 3 MA. Me have observed a good agreement between the FOCS and the reference Continuous External Rogowski (CER) coils data. The linearity of the FOCS response was demonstrated. The FOCS has performance characteristics compatible with the ITER requirements and in contrast to the CER is non-sensitive to magnetic crosstalk effects.

AB - The ITER Fibre Optic Current Sensor (FOCS) is a dc coupled current measurement system that will provide back-up ITER plasma current measurements using a sensing fibre located on the outer surface of the vacuum vessel. To address the impact of a harsh tokamak environment on the sensor performance we installed a FOCS system on JET and performed current measurements in various machine operating scenarios for currents up to 3 MA. Me have observed a good agreement between the FOCS and the reference Continuous External Rogowski (CER) coils data. The linearity of the FOCS response was demonstrated. The FOCS has performance characteristics compatible with the ITER requirements and in contrast to the CER is non-sensitive to magnetic crosstalk effects.

KW - JET

KW - ITER magnetic diagnostics

KW - Plasma current measurements

KW - Fibre optic current sensor

KW - Faraday effect

KW - Radiation effects

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/overview/39576951

U2 - 10.1016/j.fusengdes.2020.111754

DO - 10.1016/j.fusengdes.2020.111754

M3 - Article

VL - 160

SP - 1

EP - 10

JO - Fusion Engineering & Design

JF - Fusion Engineering & Design

SN - 0920-3796

M1 - 111754

ER -