3 ms·

I guess this might be a stupid question, but how does the size of the circle matter ? I mean, the particles are going in a round, wouldn't that be like infinite

• danielheath 6y ago
  Turning a particle moving at half light speed requires some pretty big magnets; the bigger the faster and tighter the turn. The bigger turning circle lets them go faster with the same magnets.
• vihren 6y ago
  It is more related to the needed strength of the magnets to keep the particles on track and also the synchrotron radiation. The first issue is that the lower the radius of the circle, the stronger magnetic field is needed because of the increased centrifugal forces. The second issue is that synchrotron radiation leads to loss of energy. It is again proportional to the acceleration perpendicular to the vector of the velocity of the particle [0]. [0] https://en.wikipedia.org/wiki/Synchrotron_radiation https://en.wikipedia.org/wiki/Synchrotron_radiation
• akjssdk 6y ago
  The particles that go around radiate their energy away, which is a function of the radius of the circle. It is called synchrotron radiation and is the main limitation factor of these kind of accelerators.
• deleted 6y ago
  [deleted]
• dilivion 6y ago
  The particles are steered round the accelerator with magnetic fields from superconducting magnets. Higher speeds (and thus energies) can be achieved by increasing the circular circuit radius by limiting the force that has to be applied and the energy loss in the acceleration (change of direction around the circle).