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Titolo:
3D SIMULATIONS ON OUTPUT POWER FLUCTUATION IN A SHORT BUNCH RF-LINAC FEL
Autore:
SENTOKU Y; FURUKAWA H; MIMA K; TAGUCHI T; KURUMA S; YASUDA H; YAMANAKA C; NAKAI S;
Indirizzi:
MITSUBISHI RES INST INC TOKYO JAPAN INST LASER TECHNOL OSAKA JAPAN OSAKA UNIV,INST LASER ENGN OSAKA JAPAN SETSUNAN UNIV,DEPT ELECT ENGN OSAKA JAPAN
Titolo Testata:
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment
fascicolo: 1-3, volume: 358, anno: 1995,
pagine: 463 - 466
SICI:
0168-9002(1995)358:1-3<463:3SOOPF>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
MODE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
5
Recensione:
Indirizzi per estratti:
Citazione:
Y. Sentoku et al., "3D SIMULATIONS ON OUTPUT POWER FLUCTUATION IN A SHORT BUNCH RF-LINAC FEL", Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 358(1-3), 1995, pp. 463-466

Abstract

A space-time dependent 3D simulation code has been developed in orderto analyze the RF-linac FEL oscillator dynamics. Our simulation code employed both the transverse mode spectral method and the longitudinalfinite difference method. The electron beam is modeled by a group of super particles which have a density profile in the time domain. In this model the electron beam is able to determine the energy spread and the finite emittance. This simulation code enables us to describe the transverse mode competition and the slippage effects in the resonator cavity. In this paper, a high power infrared FEL with a short bunch electron beam is investigated. The output power fluctuation with cavity desynchronism is simulated with this code. Especially, we investigatedthe effects of the transverse mode competition, energy spread, and the finite emittance of the electron beam on the output fluctuation. Using FELIX parameters, the FEL oscillator is simulated for 300 passes. The output power oscillates periodically in the case of single transverse mode and not in the case of multi-transverse modes. In a warm beam with multi-transverse modes, the emission is higher than that with a single mode, and the optical pulse shape is almost the after 100 passes. Furthermore, the phase space motion of the laser field is periodic and stable. As a result of the simulation, we recommend that high powerinfrared FEL operation should include multi-transverse modes in orderto get higher emission and a more stable optical pulse.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 11:49:25