Post-solitons and electron vortices generated by femtosecond intense laser interacting with uniform near-critical-density plasmas

Yue, Dongning; Chen, Min; Zhao, Yao; Geng, Pan-Fei; Yuan, Xiaohui; Dong, Quan; Sheng, Zheng-Ming; Zhang, Jie

doi:10.1088/1674-1056/ac46c5

Cited by 2 publications

(1 citation statement)

References 28 publications

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“…DLAs are promising candidates for realizing future compact and low-cost particle accelerators due to their high energy gain per unit length, which is second only to that of laser-plasma accelerators. [18][19][20][21][22][23][24] In addition, DLAs have the advantage of easy integration of cascade acceleration. [25][26][27] The design of effective micro/nano dielectric structures to generate accelerating fields driven by input lasers is a critical research topic for DLAs.…”

Section: Introductionmentioning

confidence: 99%

Structure study of a dielectric laser accelerator with discrete translational symmetry

Sun

et al. 2023

Chinese Phys. B

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Dielectric laser accelerator (DLA) is a promising technology for achieving high gradient acceleration in a compact design. Its advantages include ease of cascading and energy gain per unit distance that can exceed that of conventional accelerators by two orders of magnitude. This paper establishes rules for efficient particle acceleration using dielectric structures based on basic equations, proposes a design principle for DLA structures with clear physical images, and verifies the accuracy of the corresponding energy gain formula. DLA structures with different specifications, materials, and geometric shapes are constructed, and the achievable acceleration gradient is calculated. Our results demonstrate that effective acceleration can be achieved when the electric field sensed by particles in the acceleration cavity has zero frequency, which provides a powerful method for designing such devices. Furthermore, we demonstrate that the simplified formula for calculating energy gain presented in this paper can accurately determine the energy gain of particles during the design of dielectric accelerator acceleration structures.

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Section: Introductionmentioning

confidence: 99%

Structure study of a dielectric laser accelerator with discrete translational symmetry

Sun

et al. 2023

Chinese Phys. B

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Generation of collisionless electrostatic shock waves in interaction between strong intense laser and near-critical-density plasma

Dong-Ning¹,

Dong²,

Chen³

et al. 2023

Acta Phys. Sin.

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The generations of weak and strong collisionless electrostatic shock waves (CESWs) have been studied by the one-dimensional particle-in-cell simulations in the strong intense laser near critical density plasma interactions. The effects of the ranges of plasma density profiles, non-relativistic and relativistic laser intensities on the generations of CESWs have been explored in the paper. The non-relativistic drive laser generates the weak CESW in laser near critical density plasma interactions with the weak intensity. The electron spectra show double-temperature distributions because the non-relativistic drive laser cannot heat the electrons adequately. The low-temperature electrons have an important influence on the generations of weak CESWs and they also cause that the protons can be accelerated and reflected from the CESWs. The spectra of the weak CESWs protons show a continuously distributed profile. When the range of plasma density up-ramp is large, the process can be observed that the post-soliton structure evolves into the ion acoustic wave and further evolves into the weak collisionless electrostatic shock wave. When the drive laser intensity is relativistic, the electrons are adequately heated to a single relativistic temperature. The effects of the ranges of plasma density profiles on the generations of CESWs have been further analyzed and we found:1) when the range of plasma density up-ramp is large, the potential barrier of ion acoustic wave is shielded by the hot electrons; 2) when the range of plasma density up-ramp is small, the effective distance (i.e., the Debye length) of accelerating field is larger and the endurance time is longer than the case of large plasma density up-ramp range. This makes the ion acoustic wave structure more stable during its forward propagation process. When the velocity difference between the ion acoustic wave accelerating protons and the target normal sheath accelerating protons satisfies the proton reflection condition of CESW, the ion acoustic wave further evolves into the strong CESW and generates monoenergetic protons at the same time.

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Post-solitons and electron vortices generated by femtosecond intense laser interacting with uniform near-critical-density plasmas

Cited by 2 publications

References 28 publications

Structure study of a dielectric laser accelerator with discrete translational symmetry

Structure study of a dielectric laser accelerator with discrete translational symmetry

Generation of collisionless electrostatic shock waves in interaction between strong intense laser and near-critical-density plasma

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