You can just say fusion reactor

The Times of India is a rag that literally accepts bribes for positive coverage; sensationalist garbage is their bread and butter.

But it gets worse: this story is over two years out-of-date.

The KSTAR Research Center at the Korea Institute of Fusion Energy (KFE) announced on the 20th that during the '2023 KSTAR Plasma Campaign' conducted from December of last year to February of this year [2024], it achieved a 48-second operation of ultra-high-temperature plasma at an ion temperature of 100 million degrees and a record 102-second operation in high-confinement mode (H-mode).

This happened back in 2024. Here's a paper.