The main cause of decay of particle accelerator beams is the scattering due to residual gas particles in the vacuum rings. I read some research suggesting (in my understanding) that most of these free gas particles (CO2, CO etc) are the result of desorption from the surface of the vacuum tube (which carries the beam) due to synchrotron radiation from the beam. ie -- beam produces synchrotron radiation, which interacts with surface of the tube carrying the beam, resulting in desorption and release of residual gas particles which then collide with beam particles to cause scattering and beam decay. Is this correct? If we reduce beam velocity by a factor of 10, which would dramatically reduce synchrotron radiation (which in my understanding is proportional to 8th power of v), would that also proportionally increase beam lifetime? Any research on lower velocity beams out there?