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Particle and x-ray generation by irradiation of gaseous and solid targets with a 100 TW laser pulse

O Willi, M Behmke, L Gezici, B Hidding, R Jung, T Königstein, A Pipahl, J Osterholz, G Pretzler, A Pukhov2009年Plasma Physics and Controlled FusionIF 2.2出版社

The recently commissioned 100 TW, TiSa laser system (2.5 J, 25 fs) at the University of Düsseldorf has been used to study various issues at relativistic intensities including interaction physics, electron and proton acceleration and higher surface harmonics. The plasma evolution during and after laser pulse propagation through underdense gaseous targets was investigated with an optical probe pulse. Under similar experimental conditions the electron beam was recorded with Lanex screens and an electron spectrometer. On solid thin foil targets the production of protons was studied using a magnetic spectrometer. Due to the high contrast of the laser pulse, foil targets as thin as 300 nm could be used. Higher harmonics from laser irradiated fused silica targets were observed.

日本語訳

最近導入されたデュッセルドルフ大学の100 TW、TiSaレーザーシステム(2.5 J、25 fs)を用いて、相対論的強度における様々な問題、すなわち相互作用物理、電子加速・陽子加速、高次高調波発生について研究を行った。低密度ガスターゲット中でのレーザーパルス伝搬中および伝搬後のプラズマの時間発展を、プローブパルスを用いて調べた。同様の実験条件において、電子ビームをランクススクリーンと電子分光器を用いて記録した。固体薄膜ターゲット上での陽子生成を磁気分光器を用いて研究した。レーザーパルスの高いコントラスト比により、300 nmという薄い薄膜ターゲットの使用が可能となった。溶融石英ターゲットからの高次高調波発生を観測した。

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