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
SN - 0920-3796
VL - 160
SP - 1
EP - 10
JO - Fusion Engineering & Design
JF - Fusion Engineering & Design
M1 - 111754
ER -