Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session NP11: Poster Session V: In-Person, Hall A (9:30-11:00am) and Virtual Poster Presentations (11:15am-12:30pm)
MFE: Stellerators
HED: High Energy Density
BEAMS: Short Pulse Laser Plasmas
HED: Short Pulse Laser Plasma
SPACE: Space Plasmas
9:30 AM - 12:30 PM
Wednesday, October 19, 2022
Room: Exhibit Hall A and Online
Abstract: NP11.00125 : Fundamental research of laser wakefield acceleration driven by TW-class laser*
Presenter:
Takamitsu P Otsuka
(Utsunomiya Univ)
Authors:
Takamitsu P Otsuka
(Utsunomiya Univ)
Takahiro Gunji
(Utsunomiya Univ)
Kouichi Iida
(Utsunomiya Univ)
Rui Takahashi
(Utsunomiya Univ)
Daiki Nishida
(Utsunomiya Univ)
Duthika Perera
(Utsunomiya Univ)
Kosuke Kataya
(Utsunomiya Univ)
Yuta Ikoma
(Utsunomiya Univ)
Noboru Yugami
(Utsunomiya Univ)
To develop compact electron accelerator, we are studying self-modulated laser wakefield acceleration driven by 1 TW Ti:Sapphire laser with laser energy of 120 mJ and pulse width of 120 fs (full width at half maximum). Simulation results by 2-dimensional particle in cell code (2D-PIC) predicted that self-modulation occurs with electron density over 1020 cm-3 and laser spot diameter less than 10 μm. In the experiment, self-focusing have been observed, however, electron beam has not been observed. This is due to the electron density (initial gas density of gas-jet target) is not high enough for relativistic self-focusing. To make high dense gas-jet target, computational fluid dynamics (CFD) simulation is employed for calculating optimum dimension of De Laval nozzle. In this paper, experimental results will be discussed with numerical calculation results of 2D-PIC and CFD.
*A part of this work was supported by JSPS KAKENHI Grant Numbers JP19K20597, JP22K03565 and JP22H01197.
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