Optical spikes and superradiant pulse propagation in a free-electron laser
- Authors
- Hahn, Sang June; Lee, Jae Koo
- Issue Date
- Jul-1993
- Publisher
- ELSEVIER SCIENCE BV
- Citation
- NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.331, no.1-3, pp 390 - 394
- Pages
- 5
- Journal Title
- NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
- Volume
- 331
- Number
- 1-3
- Start Page
- 390
- End Page
- 394
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/59352
- DOI
- 10.1016/0168-9002(93)90077-U
- ISSN
- 0168-9002
1872-9576
- Abstract
- With one-dimensional nonlinear pulse propagation equations, we show numerically that the spiking behavior of free-electron lasers can be described by the superradiant pulse evolution. Two distinct dynamical regimes are defined by the characteristic length scales; slippage length (L(s)) and slippage distance (L(syn)) during one synchrotron period. In the superradiant regime (L(syn) > L(s)), the superradiant pulse (FWHM congruent-to 1/2L(Syn)) is generated in the trailing slippage region of the electron pulse. In the spiking regime (L(syn) less-than-or-equal-to L(s)), the continuous pulse modulation (FWHM congruent-to 1/2L(syn)) and the long-wavelength sidebands are observed. To compare with the experimental results, the realistic axial current profile and the shot noise are considered.
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