Electron cooling

Electron cooling (Russian: электронное охлаждение) is a method to shrink the emittance (size, divergence, and energy spread) of a charged particle beam without removing particles from the beam.

Since the number of particles remains unchanged and the space coordinates and their derivatives (angles) are reduced, this means that the phase space occupied by the stored particles is compressed.

The method was invented by Gersh Budker at INP, Novosibirsk, in 1966 for the purpose of increasing luminosity of hadron colliders.

[1] It was first tested in 1974 with 68 MeV protons at NAP-M storage ring at INP.

Basically, electron cooling works as follows: This accelerator physics-related article is a stub.