Production of picosecond square-shaped ultraviolet pulses for low-emittance electron bunch generation from an RF photocathode

Akira Yada; Kazuya Takasago; Shinji Ito; Tatsuya Yanagida; Jinfeng Yang; Masakazu Washio; Kenji Torizuka; Akira Endo

doi:10.1117/12.469490

Production of picosecond square-shaped ultraviolet pulses for low-emittance electron bunch generation from an RF photocathode

Akira Yada, Kazuya Takasago, Shinji Ito, Tatsuya Yanagida, Jinfeng Yang, Masakazu Washio, Kenji Torizuka, Akira Endo

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

We demonstrated generation of square-shaped ultraviolet pulses and that they reduces the emittance of electron beams from laser-photocathode RF-gun. Some frequency components of femtosecond pulses from a Ti:sapphire oscillator are modulated with a pulse shaper that consists of a lens pair, gratings, and a liquid crystal spatial light modulator (LC-SLM) to generate square-shaped pulses. The shaped pulses were amplified up to 3 mJ through a regenerative amplifier, and were converted to ultraviolet region with two different nonlinear crystals. Energy of the shaped pulses was about 100 μJ which is sufficient to generate electron charge of 1 nC. In our experiment, emittance of electron beam was reduced to as low as almost the half of that with non-shaped pulses.

Original language	English
Pages (from-to)	213-221
Number of pages	9
Journal	Proceedings of SPIE-The International Society for Optical Engineering
Volume	4629
DOIs	https://doi.org/10.1117/12.469490
Publication status	Published - 2002

Keywords

Emittance
Flat top
Pulse shaping
RF-gun
Square pulse
Ultraviolet

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.469490

Cite this

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title = "Production of picosecond square-shaped ultraviolet pulses for low-emittance electron bunch generation from an RF photocathode",

abstract = "We demonstrated generation of square-shaped ultraviolet pulses and that they reduces the emittance of electron beams from laser-photocathode RF-gun. Some frequency components of femtosecond pulses from a Ti:sapphire oscillator are modulated with a pulse shaper that consists of a lens pair, gratings, and a liquid crystal spatial light modulator (LC-SLM) to generate square-shaped pulses. The shaped pulses were amplified up to 3 mJ through a regenerative amplifier, and were converted to ultraviolet region with two different nonlinear crystals. Energy of the shaped pulses was about 100 μJ which is sufficient to generate electron charge of 1 nC. In our experiment, emittance of electron beam was reduced to as low as almost the half of that with non-shaped pulses.",

keywords = "Emittance, Flat top, Pulse shaping, RF-gun, Square pulse, Ultraviolet",

author = "Akira Yada and Kazuya Takasago and Shinji Ito and Tatsuya Yanagida and Jinfeng Yang and Masakazu Washio and Kenji Torizuka and Akira Endo",

year = "2002",

doi = "10.1117/12.469490",

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T1 - Production of picosecond square-shaped ultraviolet pulses for low-emittance electron bunch generation from an RF photocathode

AU - Yada, Akira

AU - Takasago, Kazuya

AU - Ito, Shinji

AU - Yanagida, Tatsuya

AU - Yang, Jinfeng

AU - Washio, Masakazu

AU - Torizuka, Kenji

AU - Endo, Akira

PY - 2002

Y1 - 2002

N2 - We demonstrated generation of square-shaped ultraviolet pulses and that they reduces the emittance of electron beams from laser-photocathode RF-gun. Some frequency components of femtosecond pulses from a Ti:sapphire oscillator are modulated with a pulse shaper that consists of a lens pair, gratings, and a liquid crystal spatial light modulator (LC-SLM) to generate square-shaped pulses. The shaped pulses were amplified up to 3 mJ through a regenerative amplifier, and were converted to ultraviolet region with two different nonlinear crystals. Energy of the shaped pulses was about 100 μJ which is sufficient to generate electron charge of 1 nC. In our experiment, emittance of electron beam was reduced to as low as almost the half of that with non-shaped pulses.

AB - We demonstrated generation of square-shaped ultraviolet pulses and that they reduces the emittance of electron beams from laser-photocathode RF-gun. Some frequency components of femtosecond pulses from a Ti:sapphire oscillator are modulated with a pulse shaper that consists of a lens pair, gratings, and a liquid crystal spatial light modulator (LC-SLM) to generate square-shaped pulses. The shaped pulses were amplified up to 3 mJ through a regenerative amplifier, and were converted to ultraviolet region with two different nonlinear crystals. Energy of the shaped pulses was about 100 μJ which is sufficient to generate electron charge of 1 nC. In our experiment, emittance of electron beam was reduced to as low as almost the half of that with non-shaped pulses.

KW - Emittance

KW - Flat top

KW - Pulse shaping

KW - RF-gun

KW - Square pulse

KW - Ultraviolet

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JO - Proceedings of SPIE-The International Society for Optical Engineering

JF - Proceedings of SPIE-The International Society for Optical Engineering

ER -

Production of picosecond square-shaped ultraviolet pulses for low-emittance electron bunch generation from an RF photocathode

Abstract

Keywords

ASJC Scopus subject areas

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