Electromagnetic instability in a quadrupole-focus accelerator
Abstract
The addition of helical focusing to a modified betatron configuration is shown to give rise to an electromagnetic instability under certain conditions. The instability arises from a three wave coupling between the helical field, a transverse mode on the beam, and a transverse-electric waveguide mode. An analytic dispersion relation is derived. Several features of the instability are confirmed using three dimensional computer simulations.
- Publication:
-
Unknown
- Pub Date:
- October 1985
- Bibcode:
- 1985eiqf.book.....H
- Keywords:
-
- Betatrons;
- Electromagnetic Interactions;
- Focusing;
- Multipoles;
- Quadrupole Networks;
- Wave Interaction;
- Computerized Simulation;
- Field Theory (Physics);
- Moments;
- Stability;
- Nuclear and High-Energy Physics