It is shown that there is an essential limit on the focusing of electron beams due to synchrotron radiation in the final focusing lens of a linear collider. The minimum possible beam size is determined almost only by an invariant emittance of a beam which is given at the entrance of a linear accelerator.
- Received 14 June 1988
- Published in the issue dated 10 October 1988
© 1988 The American Physical Society