ELI5: Explain Like I'm 5

Fusion energy gain factor

Okay kiddo, let me try to explain this to you in a way you can understand. Fusion energy gain factor is all about creating energy from atoms. When we combine two lighter atoms, like hydrogen, to make a heavier one, like helium, we get energy. It's kind of like doing a puzzle - when we put the pieces together, we get a bigger picture and a prize.

Now, the fusion energy gain factor is how much energy we get out of the fusion puzzle compared to how much energy we put into it. If we put in a little bit of energy and get a lot more energy out, then we have a high fusion gain factor. That means we are getting a lot more energy than we are using, which is great!

Scientists are working on trying to make fusion energy gain factor higher and higher, so that we can use this technology to create more clean and sustainable energy for our planet. It's kind of like trying to make a better puzzle with more pieces that give us even cooler prizes.