Super-ponderomotive electron acceleration in blowout plasma heated by multi-picosecond relativistic intensity laser pulse
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2018
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| _version_ | 1866912418262679552 |
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| author | Kojima, Sadaoki Hata, Masayasu Iwata, Natsumi Arikawa, Yasunobu Morace, Alessio Sakata, Shouhei Lee, Seungho Matsuo, Kazuki Law, King Fai Farley Morita, Hiroki Ochiai, Yugo Yogo, Akifumi Nagatomo, Hideo Ozaki, Tetsuo Johzaki, Tomoyuki Sunahara, Atsushi Sakagami, Hitoshi Zhang, Zhe Tosaki, Shota Abe, Yuki Kawanaka, Junji Tokita, Shigeki Nakai, Mitsuo Nishimura, Hiroaki Shiraga, Hiroyuki Azechi, Hiroshi Sentoku, Yasuhiko Fujioka, Shinsuke |
| author_facet | Kojima, Sadaoki Hata, Masayasu Iwata, Natsumi Arikawa, Yasunobu Morace, Alessio Sakata, Shouhei Lee, Seungho Matsuo, Kazuki Law, King Fai Farley Morita, Hiroki Ochiai, Yugo Yogo, Akifumi Nagatomo, Hideo Ozaki, Tetsuo Johzaki, Tomoyuki Sunahara, Atsushi Sakagami, Hitoshi Zhang, Zhe Tosaki, Shota Abe, Yuki Kawanaka, Junji Tokita, Shigeki Nakai, Mitsuo Nishimura, Hiroaki Shiraga, Hiroyuki Azechi, Hiroshi Sentoku, Yasuhiko Fujioka, Shinsuke |
| contents | The dependence of the mean kinetic energy of laser-accelerated electrons on the laser intensity, so-called ponderomotive scaling, was derived theoretically with consideration of the motion of a single electron in oscillating laser fields. This scaling explains well the experimental results obtained with high-intensity pulses and durations shorter than a picosecond; however, this scaling is no longer applicable to the multi-picosecond (multi-ps) facility experiments. Here, we experimentally clarified the generation of the super-ponderomotive-relativistic electrons (SP-REs) through multi-ps relativistic laser-plasma interactions using prepulse-free LFEX laser pulses that were realized using a plasma mirror (PM). The SP-REs are produced with direct laser acceleration assisted by the self-generated quasi-static electric field and with loop-injected direct acceleration by the self- generated quasi-static magnetic field, which grow in a blowout plasma heated by a multi-ps laser pulse. Finally, we theoretically derive the threshold pulse duration to boost the acceleration of REs, which provides an important insight into the determination of laser pulse duration at kilojoule- petawatt laser facilities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1803_02514 |
| institution | arXiv |
| publishDate | 2018 |
| record_format | arxiv |
| spellingShingle | Super-ponderomotive electron acceleration in blowout plasma heated by multi-picosecond relativistic intensity laser pulse Kojima, Sadaoki Hata, Masayasu Iwata, Natsumi Arikawa, Yasunobu Morace, Alessio Sakata, Shouhei Lee, Seungho Matsuo, Kazuki Law, King Fai Farley Morita, Hiroki Ochiai, Yugo Yogo, Akifumi Nagatomo, Hideo Ozaki, Tetsuo Johzaki, Tomoyuki Sunahara, Atsushi Sakagami, Hitoshi Zhang, Zhe Tosaki, Shota Abe, Yuki Kawanaka, Junji Tokita, Shigeki Nakai, Mitsuo Nishimura, Hiroaki Shiraga, Hiroyuki Azechi, Hiroshi Sentoku, Yasuhiko Fujioka, Shinsuke Plasma Physics The dependence of the mean kinetic energy of laser-accelerated electrons on the laser intensity, so-called ponderomotive scaling, was derived theoretically with consideration of the motion of a single electron in oscillating laser fields. This scaling explains well the experimental results obtained with high-intensity pulses and durations shorter than a picosecond; however, this scaling is no longer applicable to the multi-picosecond (multi-ps) facility experiments. Here, we experimentally clarified the generation of the super-ponderomotive-relativistic electrons (SP-REs) through multi-ps relativistic laser-plasma interactions using prepulse-free LFEX laser pulses that were realized using a plasma mirror (PM). The SP-REs are produced with direct laser acceleration assisted by the self-generated quasi-static electric field and with loop-injected direct acceleration by the self- generated quasi-static magnetic field, which grow in a blowout plasma heated by a multi-ps laser pulse. Finally, we theoretically derive the threshold pulse duration to boost the acceleration of REs, which provides an important insight into the determination of laser pulse duration at kilojoule- petawatt laser facilities. |
| title | Super-ponderomotive electron acceleration in blowout plasma heated by multi-picosecond relativistic intensity laser pulse |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/1803.02514 |