Published May 7, 2012 | Version v1
Journal article Metadata-only

Growth rate and start current in Smith-Purcell free-electron lasers

Creators

  • 1. Institute for Laser Technology, Suita, Osaka 565-0871 (Japan)
  • 2. Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871 (Japan)
  • 3. Department of Electronics, Information and Communication Engineering, Osaka Sangyo University, Osaka 574-8530 (Japan)
  • 4. School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054 (China)
  • 5. Laboratory of Advanced Science and Technology for Industry, University of Hyogo, Ako, Hyogo 678-1205 (Japan)
  • 6. Department of Pure and Applied Physics, Faculty of Engineering Science, Kansai University, Osaka 564-8680 (Japan)

Description

This letter reports a theory to calculate the growth rate and start current of a Smith-Purcell free-electron laser, which is a promising radiation source in the terahertz domain. A two-dimensional model was used to investigate the interaction between a sheet electron beam and the surface wave above a lamellar grating. After deriving the growth rate from the dispersion equation, the start current was carefully estimated by considering the power flow above the grating. The agreement between the predictions of our theory and the results from the particle-in-cell simulations is acceptable.

Additional details

Identifiers

DOI
10.1063/1.4711803;

Publishing Information

Journal Title
Applied Physics Letters
Journal Volume
100
Journal Issue
19
Journal Page Range
p. 191101-191101.4
ISSN
0003-6951
CODEN
APPLAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
43112834
Subject category
S07: ISOTOPES AND RADIATION SOURCES;
Descriptors DEI
CALCULATION METHODS; COMPUTERIZED SIMULATION; DIFFRACTION GRATINGS; ELECTRON BEAMS; FREE ELECTRON LASERS; MATHEMATICAL MODELS; RADIATION SOURCES; THZ RANGE; TWO-DIMENSIONAL CALCULATIONS; WAVE PROPAGATION
Descriptors DEC
BEAMS; FREQUENCY RANGE; LASERS; LEPTON BEAMS; PARTICLE BEAMS; SIMULATION

Optional Information

Notes
(c) 2012 American Institute of Physics