The effect of laser contrast on generation of highly charged Fe ions by ultra-intense femtosecond laser pulses

Anatoly Ya Faenov, Maria A. Alkhimova, Tatiana A. Pikuz, Igor Yu Skobelev, Mamiko Nishiuchi, Hironao Sakaki, Alexander S. Pirozhkov, Akito Sagisaka, Nicholas P. Dover, Kotaro Kondo, Koichi Ogura, Yuji Fukuda, Hiromitsu Kiriyama, Alexander Andreev, Keita Nishitani, Takumi Miyahara, Yukinobu Watanabe, Sergey A. Pikuz, Masaki Kando, Ruosuke KodamaKiminori Kondo

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Abstract

Experimental studies on the formation of highly charged ions of medium-Z elements using femtosecond laser pulses with different contrast levels were carried out. Multiply charged Fe ions were generated by laser pulses with 35 fs duration and an intensity exceeding 1021 W/cm2. Using high-resolution X-ray spectroscopic methods, bulk electron temperature of the generated plasma has been identified. It is shown that the presence of a laser pre-pulse at a contrast level of 105–106 with respect to the main pulse drastically decreases the degree of Fe ionization. We conclude that an effective source of energetic, multiply charged moderate and high-Z ions based on femtosecond laser–plasma interactions can be created only using laser pulses of ultra-high contrast.

Original languageEnglish
Article number197
JournalApplied Physics B: Lasers and Optics
Volume123
Issue number7
DOIs
Publication statusPublished - Jul 1 2017

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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    Faenov, A. Y., Alkhimova, M. A., Pikuz, T. A., Skobelev, I. Y., Nishiuchi, M., Sakaki, H., Pirozhkov, A. S., Sagisaka, A., Dover, N. P., Kondo, K., Ogura, K., Fukuda, Y., Kiriyama, H., Andreev, A., Nishitani, K., Miyahara, T., Watanabe, Y., Pikuz, S. A., Kando, M., ... Kondo, K. (2017). The effect of laser contrast on generation of highly charged Fe ions by ultra-intense femtosecond laser pulses. Applied Physics B: Lasers and Optics, 123(7), [197]. https://doi.org/10.1007/s00340-017-6771-2