Fusion energy group Helion said the company has completed a $465-million Series G investment round, increasing the Everett, Washington-based group’s valuation to $15.5 billion. Helion is among dozens ...

Colorado-headquartered Xcimer Energy has announced the start of operations for Phoenix, what the company calls the largest ...

Fusion startup Xcimer Energy on Wednesday flipped the switch on its Phoenix laser system, which the company says is the largest privately owned example in the world. Xcimer’s approach to fusion power ...

Housed inside Xcimer's 74,000-square-foot laser facility, Phoenix uses a krypton fluoride excimer laser, a gas-laser design ...