Journal Article Ion acceleration experiment with the high intensity, high contrast J-KAREN-P laser system

西内, 満美子  ,  桐山, 博光  ,  榊, 泰直  ,  ドーバー, ニコラス ピーター  ,  近藤, 康太郎  ,  宮原, 巧  ,  コーガ, ジェームズ  ,  ピロジコフ, アレキサンダー  ,  匂坂, 明人  ,  福田, 祐仁  ,  小倉, 浩一  ,  渡辺, 幸信  ,  神門, 正城  ,  近藤, 公伯

We report on the status of ion acceleration carried out with the J-KAREN-P laser facility at QST during the commissioning periods of the system. The system can provide PW peak power at 0.1 Hz on target and can deliver short pulses with an energy of 30 J and pulse duration of 30 fs after compression with a contrast level of better than 1012. The current achieved laser intensity is up to ~5x1021 Wcm-2 with an energy of ~9 J on target. The interaction with a 5-μm stainless steel tape target provides electrons with a typical temperature of more than 10 MeV and energetic proton beams with typical maximum energies of > 40 MeV with good reproducibility. The protons are accelerated in the Target Normal Sheath Acceleration regime, which is suitable for many applications including as an injector into a beamline for medical use, which is one of our objectives.

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