Fusion startup Tokamak Energy has set a world record by reaching 100 millionth plasma temperature in the ST40 small spherical tokamak.

British nuclear fusion company Tokamak Energy has announced that it has broken the world record for nuclear fusion. The plasma temperature in the tokamak reached 100 million degrees Celsius. The press statement says that this is the threshold required for the commercialization of fusion energy.

The company’s ST40 spherical tokamak is privately funded. It was built to test nuclear fusion, the reaction that the sun and stars use to produce energy. When two atoms collide with each other, forming a heavier nucleus, releasing a huge amount of energy.

According to Tokamak Energy, 100 million degrees Celsius is the highest temperature recorded by a spherical tokamak. Previously, several government-backed laboratories around the world have already reported 100 million degrees in conventional tokamaks, including South Korea’s KSTAR reactor and China’s EAST reactor. However, Tokamak Energy broke the record with a “more compact fusion device”. It took scientists just five years and less than 50 million pounds ($70 million) to do this.

“This achievement further confirms that spherical tokamaks are the optimal path to delivering clean, safe, low cost, scalable and globally deployable commercial fusion power,” Tokamak Energy said in a press statement.