High-energy proton beam obtained by single high-power LG laser acceleration
Hailong Zhou
Weishuai Zhang
DOI: https://doi.org/10.59429/esta.v10i4.1648
Keywords: proton acceleration, coda fi eld acceleration, Laguerre Gaussian laser
Abstract
We used 3D particle-in-cell (PIC) simulations to investigate the eff ect of a single high-energy Laguerre-Gaussian laser pulse interacting with an underdense plasma on the acceleration process of a proton beam. The single-beam LG laser drive solves the problem of the need for external proton injection and the synchronization of two laser pulses. The circularly polarized LG laser fi rst takes protons out of the high-density plasma target and pre-accelerates them through the radiation pressure acceleration mechanism (RPA). Then, when the LG laser pulse enters the low-density plasma, a special cavity structure with electron columns will be formed due to the special transverse intensity distribution of the LG laser. The self-injected proton in the special cavity will be accelerated while being confi ned to the center and steadily accelerated by the tail fi eld of the cavity at very long distances.3D PIC simulation results show when using power density when the LG laser is captured, the self-injected protons are accelerated to very high energies（the maximum energy of a proton is ）and lower divergence.
References
[1]Ledingham KWD, Galster W (2010) Laser-driven particle and photon beams and some applications. New J Phys 12:045005.
[2]Ledingham KWD, Galster W, Sauerbrey R (2007) Laser-driven proton oncology — a unique new cancer therapy? BJR 80:855–858.
[3]Kim T-Y, Cho K, Park W, et al (2014) Irradiation effects of high-energy proton beams on MoS2 field effect transistors. ACS nano 8:2774–2781
[4]Gizzi LA, Giove D, Altana C, et al (2017) A new line for laser-driven light ions acceleration and related TNSA studies. Applied Sciences 7:984
[5]Kim IJ, Pae KH, Choi IW, et al (2016) Radiation pressure acceleration of protons to 93 MeV with circularly polarized petawatt laser pulses. Physics of
Plasmas 23:
[6]Haberberger D, Tochitsky S, Fiuza F, et al (2012) Collisionless shocks in laser-produced plasma generate monoenergetic high-energy proton beams. Nature
Physics 8:95–99
[7]Tajima T (2014) Laser acceleration in novel media. Eur Phys J Spec Top 223:1037–1044. https://doi.org/10.1140/epjst/e2014-02154-6
[8]Yan X, Wu H-C, Sheng Z, et al (2009) Self-organizing GeV, nanocoulomb, collimated proton beam from laser foil interaction at 7times 10 21 W/cm 2.
Physical review letters 103:135001
[9]Qiao B, Zepf M, Borghesi M, Geissler M (2009) Stable GeV ion-beam acceleration from thin foils by circularly polarized laser pulses. Physical review letters
102:145002