Generation of submili-joule picosecond square shaped pulses for low emittance electron generation in photocathode RF-GUN

Issue title: Proceedings of the tenth International Symposium on Applied Electromagnetics and Mechanics ISEM-Tokyo

Article type: Research Article

Authors: Takasago, Kazuya^a | Yada, Akira^a | Miura, Taisuke^b | Washio, Masakazu^a | Kannari, Fumihiko^b | Torizuka, Kenji^c | Endo, Akira

Affiliations: [a] The Femtosecond Technology Research Associations, Department of Applied Physics, Waseda University, Japan | [b] Department of Electronics and Electrical Engineering, Keio University, Japan | [c] National Institute of Advanced Industrial Science and Technology, 5-5, Tokodai, Tsukuba, 300-2635, Japan

Abstract: Arbitrary shaping of a sub-milli joule femtosecond pulses has been demonstrated by manipulation of optical frequency phase components on the Fourier plane. The shaped pulses were pulse trains and picosecond square pulses for low emittance electron generation in a RF photocathode. Since the pulse shaping apparatus was placed between an oscillator and a pulse stretcher in order to avoid damage to the liquid crystal spatial light modulator, phase-only modulation was used for shaping to avoid damage to optical elements in a regenerative amplifier. The phase modulation was designed by simulated annealing optimization method.

DOI: 10.3233/JAE-2002-373

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 14, no. 1-4, pp. 151-156, 2002