Ribbon beam free electron laser
US4888776A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1988 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Dec 13, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/0903
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An FEL array is comprised of adjacent FEL modules. Each module preferably uses a ribbon beam plasma-anode E-gun (PAG) or another plasma-assisted E-gun to produce a planar E-beam that interacts with a planar wiggler magnetic field. The modules may share a common electron gun. A control signal is input through a phase priming array to preselect the radiation mode. A planar, distributed Bragg resonator/reflector is used to set up a high-Q cavity, enabling the low gain module to produce high power radiation. The FEL modules are arranged in an array to reduce the output radiation flux density while achieving high output power density in the far-field, and to permit beam steering by phase control of individual modules. The relatively low current density of the individual E-guns lessens the size of the guiding magnetic field in each module to the extent that the wiggler magnetic field alone is sufficient to perform this guiding function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.