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I. Bolshakova,
V. Chekanov,
I. Duran,
R. Holyaka,
R. Konopleva,
S. Kulikov,
C. Leroy,
E. Makido,
A. Marusenkov,
P.J. Moreau,
I. Nazarkin,
F. Shurygin,
J. Stockel,
G. Vayakis,
V. Yerashok
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ABSTRACT: Present work discusses the issues of creating the instrumentation for testing the semiconductor magnetic field sensors during their irradiation with neutrons in nuclear reactors up to fluences similar to neutron fluences in steady-state sensor locations in ITER. The novelty of the work consists in Hall sensor parameters being investigated: first, directly during the irradiation (in real time), and, second, at high irradiation levels (fast neutron fluence > 10<sup>18</sup>n/cm<sup>2</sup>). Developed instrumentation has been successfully tested and applied in the research experiments on radiation stability of magnetic sensors in IBR-2 (JINR, Dubna) and VVR-M (PNPI, Saint-Petersburg) reactors.
Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2009 First International Conference on; 07/2009
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P. Moreau, I. Bolshakova,
B. Brichard,
G. Chitarin,
R. Delogu,
I. Duran,
A. Encheva,
Y. Fournier,
A. Galo,
A. Le-Luyer,
J.B. Lister,
P. Malard,
J.M. Moret,
P. Pastor,
S. Peruzzo,
J. Romero,
D. Testa,
M. Toussaint,
G. Vayakis,
R. Vila
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ABSTRACT: Magnetic diagnostics of the ITER tokamak must fulfill demanding specifications, because their accuracy and reliability affects margins to the machine engineering limits and there-fore operational flexibility. This paper describes the challenging issues related to the implementation of the magnetic diagnostics in a tokamak environment. We focus on nuclear radiations as they can significantly affect the measurement through Radiation Induced Electromotive Force (RIEMF) or Thermally Induced Electromotive Force (TIEMF). Thermal modeling of magnetic sensors and associated design studies are also reported as the thermal gradient in the sensors must be reduced to avoid TIEMF. Alter-native magnetic sensors such as fiber optic current sensors (FOCS) or steady state magnetic field sensors are also discussed because they serve as a backup to the usual inductive magnetic measurements. We conclude by a brief review of the development needs for magnetic diagnostics.
Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2009 First International Conference on; 07/2009
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ABSTRACT: In the paper, we report the results on the development of Hall sensor-based devices possessing the functions of selfdiagnostics and automatic correction, which are aimed at the improvement of the magnetic field measuring accuracy in radiation environment of thermonuclear reactors. Developed devices are based on radiation-hard semiconductor sensors. The method for device stabilization is offered, which is based on a test method of measurements, where sensor and actuator are combined in a single primary transducer. New algorithm of correction of the transduction function on the basis of frequency separation of differential and integral signal components is proposed. The results of the testing of developed Hall sensor-based devices, applied for the magnetic field measurement at the largest European thermonuclear reactors TORE SUPRA (France) and JET (Great Britain), are presented.
Sensor Letters 02/2007; 5(1):283-288. · 0.82 Impact Factor
