Test bench for calibration of magnetic field sensor prototypes for COMPASS-U tokamak

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F21%3A00543176" target="_blank" >RIV/61389021:_____/21:00543176 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/21:10439758 RIV/49777513:23220/21:43961939

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S092037962100243X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S092037962100243X?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fusengdes.2021.112467" target="_blank" >10.1016/j.fusengdes.2021.112467</a>

Result language

angličtina

Original language name

Test bench for calibration of magnetic field sensor prototypes for COMPASS-U tokamak

Original language description

Magnetic field sensors are fundamental for control and physics exploitation of fusion devices. Their inductive nature implies high dynamic ranges and a broad bandwidth, thus a precise characterization and calibration of these probes is paramount. COMPASS-U will have a completely new set of magnetic diagnostics, from sensors to data acquisition. Sensors installed in-vessel will operate at 300–500 °C and should survive transients of even higher temperatures and thus materials used should be high-temperature compatible. These design limitations will have an impact on the dynamic range and bandwidth of the sensors, which needs to be reliably quantified, optimally with the same test bench for all sensor types. The first part of this work presents a test bench and the process of how to calibrate the effective area using a large solenoidal coil and frequency response of the magnetic sensor prototypes with a Helmholtz coil. In the second part, test results of the sensor prototypes are presented and discussed in detail. The low-bandwidth sensors made of mineral insulated cable (MIC), intended for plasma control and machine protection, show negligible attenuation up to 10 kHz, sufficient for their role. For fast coils consisting of bare wire wound on ceramic mandrel and Thick Printed Copper (TPC) sensors the negligible attenuation measured below 1 MHz is again sufficient for their intended purpose of detecting fast coherent plasma fluctuations. Resonances introduced by the capacitance of long cables from the vacuum vessel feedthroughs to the data acquisition systems are measured, to model their influence on the signal.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Fusion Engineering and Design

ISSN

0920-3796

e-ISSN

1873-7196

Volume of the periodical

168

Issue of the periodical within the volume

July

Country of publishing house

CH - SWITZERLAND

Number of pages

5

Pages from-to

112467

UT code for WoS article

000670076200004

EID of the result in the Scopus database

2-s2.0-85102246506