As far as the tile roofs, they last a long time. It isn't the tile that is the issue, it's the felt (or paper) underneath that gets replaced. Mine is 25 years old, has not been replaced yet. Some neighbors have had theirs redone, but many have not as yet. 04-06-2011, 12:00 AM.
Particle Accelerators Could Be Used to Produce Energy (and Plutonium) Particle accelerators, which are not renowned for their real-world applications, could in fact be used to produce energy, according to a 34-year-old research paper that resurfaced this week.
What is Cyclotron Accelerator? Cyclotron accelerator is also a particle accelerator, which is mostly used in small-scale projects. A cyclotron is a circular vacuum chamber where the acceleration of particles begins at the center. The particles take a spiral path as they are accelerated.