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Title: Axial interaction free-electron laser

Abstract

Electron orbits from a helical axial wiggler in an axial guide field are absolutely unstable as power is extracted from the particles. For off-axis beams an axial FEL mechanism exists when the axial electric field in a TM mode is wiggled to interact with the axial velocity of the electrons that form the beam. The interaction strength is comparable to that for helical FELs and is insensitive to beam orbit errors. The orbits for this mechanism are extremely stable in the absence of space charge and lead to high extraction efficiencies without particle phasing incoherence or interception. This interaction mechanism is suitable for use with intense annular electron beams for high power generation at microwave frequencies. 5 figs.

Inventors:
Issue Date:
Research Org.:
University of California
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
527785
Patent Number(s):
5,663,971
Application Number:
PAN: 8-626,661
Assignee:
Univ. of California, Office of Technology Transfer, Alameda, CA (United States) PTO; SCA: 426002; PA: EDB-97:126641; SN: 97001846769
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 2 Sep 1997
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; FREE ELECTRON LASERS; WIGGLER MAGNETS; ORBIT STABILITY; OSCILLATION MODES; ELECTRON BEAMS; MICROWAVE RADIATION

Citation Formats

Carlsten, B.E. Axial interaction free-electron laser. United States: N. p., 1997. Web.
Carlsten, B.E. Axial interaction free-electron laser. United States.
Carlsten, B.E. Tue . "Axial interaction free-electron laser". United States.
@article{osti_527785,
title = {Axial interaction free-electron laser},
author = {Carlsten, B.E.},
abstractNote = {Electron orbits from a helical axial wiggler in an axial guide field are absolutely unstable as power is extracted from the particles. For off-axis beams an axial FEL mechanism exists when the axial electric field in a TM mode is wiggled to interact with the axial velocity of the electrons that form the beam. The interaction strength is comparable to that for helical FELs and is insensitive to beam orbit errors. The orbits for this mechanism are extremely stable in the absence of space charge and lead to high extraction efficiencies without particle phasing incoherence or interception. This interaction mechanism is suitable for use with intense annular electron beams for high power generation at microwave frequencies. 5 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {9}
}