High-brightness electron injectors: A review
Abstract
The last decade has seen increased emphasis on the development of high-brightness electron beams because of rigorous requirements of the new generation of colliders and the advent of free-electron lasers. The approaches now being explored for attaining intense, bright electron beams are described. The methods for producing bright electron beams include photocathode-based, short-pulse injectors; direct current electrostatic accelerator sources; long-pulse beams, which are then compressed in time using subharmonic bunching; combining first and third harmonics in an accelerator to attain the equivalent of high-gradient dc fields; and LaB6 radio frequency guns. For several of the approaches, the temporal length of the electron pulse is decreased after acceleration to relativistic energies by impressing an energy spread on the electron bunch and using a nonisochronous beam-transport system to increase the peak current.
- Publication:
-
Presented at the 13th Particle Accelerator Conference
- Pub Date:
- 1989
- Bibcode:
- 1989paac.confT..20S
- Keywords:
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- Beam Injection;
- Brightness;
- Electron Accelerators;
- Electron Beams;
- Free Electron Lasers;
- Injectors;
- Photoelectric Emission;
- Beam Currents;
- Electron Bunching;
- Electron Guns;
- Electrostatic Generators;
- Photocathodes;
- Pulse Generators;
- Electronics and Electrical Engineering