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

Kód výsledku v 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>

Nalezeny alternativní kódy

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

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Fusion Engineering and Design

ISSN

0920-3796

e-ISSN

1873-7196

Svazek periodika

168

Číslo periodika v rámci svazku

July

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

5

Strana od-do

112467

Kód UT WoS článku

000670076200004

EID výsledku v databázi Scopus

2-s2.0-85102246506