Sparking limits, cavity loading, and beam breakup instability associated with high-current RF linacs
Abstract
The limitations on high current RF linacs due to gap sparking, cavity loading, and the beam breakup instability are studied. It appears possible to achieve cavity accelerating gradients as high as 35 MV/m without sparking. Furthermore, a linear analysis, as well as self consistent particle simulations of a multipulsed 10 kA beam, indicated that only a negligible small fraction of energy is radiated into nonfundamental cavity modes. Finally, the beam breakup instability is analyzed and found to be able to magnify initial radial perturbations by a factor of no more than about 20 during the beam transit time through a 1 GeV accelerator.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- January 1982
- Bibcode:
- 1982STIN...8320023F
- Keywords:
-
- Cavities;
- Electron Beams;
- Linear Accelerators;
- Spark Gaps;
- Beam Injection;
- Field Strength;
- Mathematical Models;
- Standing Waves;
- Electronics and Electrical Engineering