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Electrons can be accelerated to a GeV level in centimeters by plasma wakefield driven by laser. With the development of chirped pulse amplification technique, the accelerating field can reach 100 GV/m. The laser driven wakefield acceleration experiments with ionization injection are carried out using 68 TW (1.7 J, 25 fs) laser and a mixture gas of 99% He and 1% N2. In experiment, the output electron beam has broadband spectrum with a maximum cut-off energy of about 290 MeV and a maximum output energy is quite stable in a certain range of laser focal positions. Two-dimensional particle-in-cell simulation is carried out. It is found that the longitudinal phase space is occupied by the continuously injected electrons and the phase space distribution is quite stable after the laser has propagated several millimeters inside plasma. This acceleration process can lead to quite stable maximum output energy of electron beam. These experiments reveal the physical nature of continuous ionization injection, which is very important for improving the performance of ionization injection.
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Keywords:
- laser driven wakefield acceleration /
- ionization injection /
- phase space /
- large energy-spread
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[1] Tajima T, Dawson J M 1979 Phys. Rev. Lett. 43 267
[2] Strickland D, Mourou G 1985 Opt. Commun. 55 219
[3] Gahn C, Tsakiris G D, Pukhov A, Meyer-ter-Vehn J, Pretzler G, Thirolf P, Habs D, Witte K J 1999 Phys. Rev. Lett. 83 4772
[4] Esarey E, Schroeder C B, Leemans W P 2009 Office of Scientific Technical Information Technical Reports 81 1229
[5] Faure J, Glinec Y, Pukhov A, Kiselev S, Gordienko S, Lefebvre E, Rousseau J P, Burgy F, Malka V 2004 Nature 431 541
[6] Geddes C G R, Toth C, Tilborg J V, Esarey E, Schroeder C B, Bruhwller D, Nleter C, Cary J, Leemans W P 2004 Nature 431 538
[7] Mangles S P, Murphy C D, Najmudin Z, Thomas A G R, Collier J L, Dangor A E, Divall E J, Foster P S, Gallacher J G, Hooker C J, Jaroszynskl D A, Langley A J, Mori W B, Norreys P A, Tsung F S, Viskup R, Walton B R, Krushelnick K 2004 Nature 431 535
[8] Leemans W P, Nagler B, Gonsalves A J, Toth C, Nakamura K, Geddes C G R, Esarey E, Schroeder C B, Hooker S M 2006 Nat. Phys. 2 696
[9] Wang X M, Rafal Z, Neil F, Li Z Y, Yi S A, Zhang X, Henderson W, Chang Y Y, Korzekwa R, Tsai H E, Pai C H, Quevedo H, Dyer G, Gaul E, Martinez M, Bernstein A C, Borger T, Spinks M, Donovan M, Khudik V, Shvets G, Ditmire T, Downer M C 2013 Nat. Commun. 4 1988
[10] Leemans W P, Gonsalves A J, Mao H S, Nakamura K, Benedetti C, Schroeder C B, Toth C, Daniels J, Mittelberger D E, Bulanov S S, Vay J L, Geddes C G R, Esarey E 2014 Phys. Rev. Lett. 113 245002
[11] Faure J, Rechatin C, Norlin A, Lifschitz A, Glinec Y, Malka V 2006 Nature 444 737
[12] Schmid K, Buck A, Sears C M S, Mikhailova J M, Tautz R, Herrmann D, Geissler M, Krausz F, Veisz L 2010 Phys. Rev. ST Accel. Beams 13 091301
[13] Clayton C E, Ralph J E, Albert F, Fonseca R A, Glenzer S H, Joshi C, Lu W, Marsh K A, Martins S F, Mori W B, Pak A, Tsung F S, Pollock B B, Ross J S, Silva L O, Froula D H 2010 Phys. Rev. Lett. 105 105003
[14] Kameshima T, Hong W, Sugiyama K, Wen X L, Wu Y C, Tang C M, Zhu Q H, Gu Y Q, Zhang B H, Peng H H, Kurokawa S-ichi, Chen L M, Tajima T, Kumita T, Nakajima K 2008 Appl. Phys. Express 1 066001
[15] Liu J S, Xia C Q, Wang W T, Lu H Y, Wang C, Deng A H, Li W T, Zhang H, Liang X Y, Leng Y X 2011 Phys. Rev. Lett. 107 035001
[16] Lu H Y, Liu M W, Wang W T, Wang C, Liu J S, Deng A H, Xu J C, Xia C Q, Li W T, Zhang H 2011 Appl. Phys. Lett. 99 091502
[17] Mirzaie M, Li S, Zeng M, Hafz N A M, Chen M, Li G Y, Zhu Q J, Liao H, Sokollik T, Liu F 2015 Sci. Rep. 5 14659
[18] Li F, Zhang C J, Wan Y, Wu Y P, Xu X L, Hua J F, Pai C H, Lu W, Gu Y Q, Mori W B 2016 Plasma Phys. Controlled Fusion 58 034004
[19] Zhang C J, Hua J F, Xu X L, Li F, Pai C H, Wan Y, Wu Y C, Gu Y Q, Mori W B, Joshi C 2016 Sci. Rep. 6 29485
[20] Shang Y, Zhu K, Lin C, Lu H Y, Zou Y B, Shou Y R, Cao C, Zhao S, Geng Y X 2013 Sci. Sin.: Phys. Mech. Astron. 43 1282
[21] Chen M, Sheng Z M, Ma Y Y, Zhang J 2006 J. Appl. Phys. 99 056109
[22] Chen M, Esarey E, Schroeder C B, Geddes C G R, Leemans W P 2012 Phys. Plasmas 19 033101
[23] Lu H Y, Liu J S, Wang C, Wang W T, Zhou Z L, Deng A H, Xia C Q, Xu Y, Leng Y X, Ni G Q, Li R X, Xu Z Z 2009 Phys. Plasmas 16 083107
[24] Lu W, Tzoufras M, Joshi C, Tsung F S, Mori W B, Vieira J, Fonseca R A, Silva L O 2007 Phys. Rev. ST Accel. Beams. 10 061301
[25] Froula D H, Clayton C E, Dppner T, Marsh K A, Barty C P, Divol L, Fonseca R A, Glenzer S H, Joshi C, Lu W, Martins S F, Michel P, Mori W B, Palastro J P, Pollock B B, Pak A, Ralph J E, Ross J S, Siders C W, Silva L O, Wang T 2009 Phys. Rev. Lett. 103 215006
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