TY - DATA T1 - The results of the numerical simulation of the temporal profile of the seeded FEL output pulses when a 13th-order harmonic pulse are introduced into the undulator(s) to interact with an electron bunch whose durations are (a) 0 PY - 2013/08/13 AU - T Sato AU - T Togashi AU - K Yamakawa AU - M Aoyama AU - K Midorikawa AU - E J Takahashi AU - K Yamanouchi AU - S Owada AU - A Iwasaki AU - K Fukami UR - https://iop.figshare.com/articles/figure/_The_results_of_the_numerical_simulation_of_the_temporal_profile_of_the_seeded_FEL_output_pulses_whe/1012363 DO - 10.6084/m9.figshare.1012363.v1 L4 - https://ndownloader.figshare.com/files/1480185 KW - contrast ratio KW - test accelerator KW - riken KW - FEL output pulses KW - amplification processes KW - sase KW - electron bunch duration KW - nm KW - wavelength region KW - scss KW - femtosecond laser pulses KW - electron bunch KW - electron bunches KW - undulator KW - Atomic Physics KW - Molecular Physics N2 - Figure 4. The results of the numerical simulation of the temporal profile of the seeded FEL output pulses when a 13th-order harmonic pulse are introduced into the undulator(s) to interact with an electron bunch whose durations are (a) 0. 2 ps, (b) 0.6 ps and (c) 1 ps. The solid and dashed lines represent respectively the temporal profiles obtained using one undulator (4.5 m length) and those obtained using two undulators (9 m length in total). Abstract By introducing 13th- (61.7 nm) and 15th-order harmonics (53.4 nm) of femtosecond laser pulses at 800 nm into an undulator of SCSS (SPring-8 Compact SASE Source) test accelerator at RIKEN, these harmonic pulses were amplified by a factor of more than 102 with a high contrast ratio through the interaction between accelerated electron bunches and the harmonic pulses. From numerical simulations of the amplification processes of high-order harmonic pulses in the undulator, optimum conditions of the electron bunch duration interacting with the high-order harmonic pulses were investigated for generating full-coherent and intense pulses in the extreme ultraviolet wavelength region. ER -