80keV 1 MW NBI on COMPASS tokamak: the results and operational experience

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F25%3A00647952" target="_blank" >RIV/61389021:_____/25:00647952 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0920379625002753" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0920379625002753</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fusengdes.2025.115078" target="_blank" >10.1016/j.fusengdes.2025.115078</a>

Jazyk výsledku

angličtina

Název v původním jazyce

80keV 1 MW NBI on COMPASS tokamak: the results and operational experience

Popis výsledku v původním jazyce

Prior to the final experimental campaign of the COMPASS tokamak, its heating system was upgraded with the 1 MW, 80 keV Neutral Beam Injection (NBI) unit, complementing the existing two 40 keV, 300 kW NBIs. This upgrade significantly improved tokamak performance, achieving a central electron temperature of 2 keV, a 30 % increase in plasma stored energy, an eightfold rise in neutron yield, and enabling H-mode operation in a reversed toroidal magnetic field. Experimental tests confirmed that the system met its technical specifications, delivering 1 MW of neutral beam power with a beam divergence of <12 mrad, thereby validating its suitability for COMPASS-U. However, the integration process revealed technical and design challenges, which provided valuable insights for mitigation strategies and future improvements. The COMPASS-U project plans to incorporate up to six similar injectors, making the operational experience gained from this upgrade critical for future tokamak operations. Furthermore, the data collected during the campaign highlighted limitations in COMPASS's auxiliary systems, including water cooling performance, grounding schemes, and other infrastructure requirements. These findings will inform the optimization of the future tokamak and NBI's systems and ensure robust performance in next-generation tokamak experiments.

Název v anglickém jazyce

80keV 1 MW NBI on COMPASS tokamak: the results and operational experience

Popis výsledku anglicky

Prior to the final experimental campaign of the COMPASS tokamak, its heating system was upgraded with the 1 MW, 80 keV Neutral Beam Injection (NBI) unit, complementing the existing two 40 keV, 300 kW NBIs. This upgrade significantly improved tokamak performance, achieving a central electron temperature of 2 keV, a 30 % increase in plasma stored energy, an eightfold rise in neutron yield, and enabling H-mode operation in a reversed toroidal magnetic field. Experimental tests confirmed that the system met its technical specifications, delivering 1 MW of neutral beam power with a beam divergence of <12 mrad, thereby validating its suitability for COMPASS-U. However, the integration process revealed technical and design challenges, which provided valuable insights for mitigation strategies and future improvements. The COMPASS-U project plans to incorporate up to six similar injectors, making the operational experience gained from this upgrade critical for future tokamak operations. Furthermore, the data collected during the campaign highlighted limitations in COMPASS's auxiliary systems, including water cooling performance, grounding schemes, and other infrastructure requirements. These findings will inform the optimization of the future tokamak and NBI's systems and ensure robust performance in next-generation tokamak experiments.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

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

216

Číslo periodika v rámci svazku

July

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

115078

Kód UT WoS článku

001472083500001

EID výsledku v databázi Scopus

2-s2.0-105002408156