量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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Laser acceleration is an application of high intense laser pulse. The laser accelerated electron beam has a short pulse width as the order of femtosecond. In order to use the laser accelerated electron beam, the stability and the control of the electron beam is one of the problems. In order to control the laser accelerated electron beam, the control of the plasma wave excited by a laser pulse is necessary. In order to control the plasma wave, the wave should be measured. As a first step of the control, we measure the plasma wave. By using two chirped probe pulses, frequency domain holographic (FDH) measurement is conducted. In the case of FDH, the spectrum can be converted to time. FDH is one of the single-shot plasma wave measurements. In order to produce the plasma wave, 10 TW and 30 fs laser pulse is focused onto a Helium gas jet. The two probe pulses are parallel to the main pulse. Without plasma wave, the interference fringes are straight lines. However, with plasma wave, the fringes are shifted. From the shift, the plasma density can be calculated. As a result, single-shot plasma wave measurement is succeeded.
Single Shot Measurement of Plasma Wake Wave by using Frequency Domain Holographic
