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High charge state carbon ions are observed from the rear surface of thin foil irradiated by intense femtosecond laser pulse at intensities up to 6.4×1018 W/cm2. The origin of the ions is studied by analyzing the basic ionization process occurring at the rear surface. It is shown that the normally dominant ionization process is field ionization by barrier suppression for charge states less than He-like (C4+), while collisional ionization is significant for C5+ and C6+.
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Keywords:
- ultrashort laser-foil interaction /
- ion acceleration /
- field ionization /
- collisional ionization
[1] Snavely R A, Key M H, Hatchett S P, Cowan T E, Roth M, Phillips T W, Stoyer M A, Henry E A, Sangster T C, Singh M S, Wilks S C, MacKinnon A, Offenberger A, Pennington D M, Yasuike K, Langdon A B, Lasinski B F, Johnson J, Perry M D, Campbell E M 2000 Phys. Rev. Lett. 85 2945
[2] Clark E L, Krushelnick K, Davies J R, Zepf M, Tatarakis M, Beg F N, Machacek A, Norreys P A, Santala M I K, Watts I, Dangor A E 2000 Phys. Rev. Lett. 84 670
[3] Roth M, Blazevic A, Geissel M, Schlegel T 2002 Phys. Rev. Spec. Top.: Accel. Beams 5 061301
[4] Hatchett S P, Brown C G, Cowan T E, Henry E A, Johnson J S 2000 Phys. Plasmas 7 2076
[5] Hegelich M, Karsch S, Pretzler G, Habs D, Witte K, Guenther W, Allen M, Blazevic A, Fuchs J, Gauthier J C, Geissel M, Audebert P, Cowan T, Roth M 2002 Phys. Rev. Lett. 89 085002
[6] Korzhimanov A V, Efimenko E S, Golubev S V, Kim A V 2012 Phys. Rev. Lett. 109 245008
[7] Carrol D C, Tresca O, Prasad R, Romagnani L, Foster P S, Gallegos P, Ter-Avetisyan S, Green J S, Streeter M J V, Dover N, Palmer C A J, Brenner C M, Cameron F H, Quinn K E, Schreiber J, Robinson A P L, Baeva T, Quinn M N, Yuan X H, Najmudin Z, Zepf M, Neely D, Borghesi M, Mckenna P 2010 New J. Phys. 12 045020
[8] Hegelich B M 2002 Ph. D. Dissertation (Germeny: Ludwig Maximilian Muenchen Universitaet)
[9] Bauer D, Mulser P, Steeb W H 1995 Phys. Rev. Lett. 75 4622
[10] Tikhonchuk V T 2002 Phys. Plasmas 9 1416
[11] Xu M H, Li Y T, Yuan X H, Yu Q Z, Wang S J, Zhao W, Wen X L, Wang G C, Jiao C Y, He Y L, Zhang S G, Wang X X, Huang W Z, Gu Y Q, Zhang J 2006 Phys. Plasmas 13 104507
[12] Xu M H, Li Y T, Carroll D C, Foster P S, Hawkes S 2012 Appl. Phys. Lett. 100 084101
[13] Sinenian N, Fiksel G, Frenje J A, Freeman C G, Manuel M J E 2012 Phys. Plasmas 19 093118
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[1] Snavely R A, Key M H, Hatchett S P, Cowan T E, Roth M, Phillips T W, Stoyer M A, Henry E A, Sangster T C, Singh M S, Wilks S C, MacKinnon A, Offenberger A, Pennington D M, Yasuike K, Langdon A B, Lasinski B F, Johnson J, Perry M D, Campbell E M 2000 Phys. Rev. Lett. 85 2945
[2] Clark E L, Krushelnick K, Davies J R, Zepf M, Tatarakis M, Beg F N, Machacek A, Norreys P A, Santala M I K, Watts I, Dangor A E 2000 Phys. Rev. Lett. 84 670
[3] Roth M, Blazevic A, Geissel M, Schlegel T 2002 Phys. Rev. Spec. Top.: Accel. Beams 5 061301
[4] Hatchett S P, Brown C G, Cowan T E, Henry E A, Johnson J S 2000 Phys. Plasmas 7 2076
[5] Hegelich M, Karsch S, Pretzler G, Habs D, Witte K, Guenther W, Allen M, Blazevic A, Fuchs J, Gauthier J C, Geissel M, Audebert P, Cowan T, Roth M 2002 Phys. Rev. Lett. 89 085002
[6] Korzhimanov A V, Efimenko E S, Golubev S V, Kim A V 2012 Phys. Rev. Lett. 109 245008
[7] Carrol D C, Tresca O, Prasad R, Romagnani L, Foster P S, Gallegos P, Ter-Avetisyan S, Green J S, Streeter M J V, Dover N, Palmer C A J, Brenner C M, Cameron F H, Quinn K E, Schreiber J, Robinson A P L, Baeva T, Quinn M N, Yuan X H, Najmudin Z, Zepf M, Neely D, Borghesi M, Mckenna P 2010 New J. Phys. 12 045020
[8] Hegelich B M 2002 Ph. D. Dissertation (Germeny: Ludwig Maximilian Muenchen Universitaet)
[9] Bauer D, Mulser P, Steeb W H 1995 Phys. Rev. Lett. 75 4622
[10] Tikhonchuk V T 2002 Phys. Plasmas 9 1416
[11] Xu M H, Li Y T, Yuan X H, Yu Q Z, Wang S J, Zhao W, Wen X L, Wang G C, Jiao C Y, He Y L, Zhang S G, Wang X X, Huang W Z, Gu Y Q, Zhang J 2006 Phys. Plasmas 13 104507
[12] Xu M H, Li Y T, Carroll D C, Foster P S, Hawkes S 2012 Appl. Phys. Lett. 100 084101
[13] Sinenian N, Fiksel G, Frenje J A, Freeman C G, Manuel M J E 2012 Phys. Plasmas 19 093118
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