To my knowledge you’re the first author to publish a story in which the dense plasma focus device is used as an actual power source, but I could be way wrong about that. I started writing a story about a year ago that features dense plasma focus technology, but it remains unfinished so far.
I’d think readers of science fiction would readily accept fusion generators some forty years into the future. Compared to other sorts of futuristic technologies, I don’t think that’s much of a stretch. Then again, one could have said the same thing forty years ago.