Collective Thomson scattering measurements of electron feature using stimulated Brillouin scattering in laser-produced plasmas

Bolouki, Nima; Sakai, Kiyomi; Huang, Teng-Hao; Isayama, Shogo; Liu, Y. L.; Peng, Cheng-Chung; Chen, C. H.; Khasanah, N.; Chu, Hsu-Hsin; Moritaka, Toseo; Tomita, Kentaro; Sato, Yuta; Uchino, Kenji; Morita, T.; Matsukiyo, Shuichi; Hara, Y.; Shimogawara, H.; Sakawa, Y.; Sakata, Shohei; Kojima, Sadaoki; Fujioka, Shinsuke; Shoji, Yoshitaka; Tomiya, S.; Yamazaki, Ryo; Kœnig, M.; Kuramitsu, Yasuhiro

doi:10.1016/j.hedp.2019.06.002

Cited by 4 publications

(5 citation statements)

References 17 publications

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“…The parameters of electron density and temperature shown in Table I obtained from NCU 100 TW experiment are as the same order as that obtained with high power lasers which is typically used in laboratory astrophysics 7 . The result shows that it is possible to conduct experiments of laboratory astrophysics using tabletop lasers.…”

Section: Methodsmentioning

confidence: 65%

“…The scattered light is detected with the spectrometer of CTS in Fig. 7 (c) 7 . The image of probe beam is transferred through the slit to the detector of ICCD keeping the spatial information.…”

Section: Methodsmentioning

confidence: 99%

“…These are the significant advantages of laboratory astroa) kentaro.sakai@eie.eng.osaka-u.ac.jp b) kuramitsu@eei.eng.osaka-u.ac.jp physics, and highly challenging in space and astrophysical plasmas 1,2 . For instance, we have investigated collisionless shocks and magnetic reconnections relevant to space and astrophysical phenomena, such as supernova remnants, earth's bow shocks, solar flares, stellar winds, and aurorae, with Gekko XII (GXII) laser facility [3][4][5][6][7][8] , however, the number of shots is very limited due to the low repetition rate of GXII (a few shots per day) and there exist only several large facilities like GXII in the world. Therefore, the opportunities of experiments on laboratory astrophysics are limited.…”

Section: Introductionmentioning

confidence: 99%

“…As mentioned above, in laboratories global and local information of phenomena can be obtained simultaneously. Collective Thomson scattering (CTS) is a unique tool to measure local plasma quantities of the density, velocity, and temperature both of electrons and ions [5][6][7][8][9] . A conventional CTS analysis assumes plasmas to be linear, stationary, equilibrium, and stable 10 , however, in many high energy space and astrophysical phenomena as well as laser-produced plasmas relevant to laboratory astrophysics, such as collisionless shocks and magnetic reconnections, are highly nonlinear, non-stationary, and non-equilibrium, and show various kinds of instabilities.…”

Section: Introductionmentioning

confidence: 99%

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Collective Thomson scattering in non-equilibrium laser produced two-stream plasmas

et al. 2020

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We theoretically and numerically investigate the ion acoustic feature of collective Thomson scattering (CTS) in two-stream plasmas. When the electron distribution functions of two components overlap each other, the theoretical spectrum shows asymmetry that is not seen in the spectra from Maxwell distributions because of the electron Landau damping. Numerical simulations support the theoretical spectra. We also present the effect of two-stream type instability in the ion acoustic feature showing the opposite trend to the overlapped case resulting from the asymmetry in electron distribution function caused by the instability. Our results show that the two-stream plasmas have significant effects on CTS spectra and the waves resulting from instability can be observed in the ion acoustic feature.

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Section: Methodsmentioning

confidence: 65%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Collective Thomson scattering in non-equilibrium laser produced two-stream plasmas

et al. 2020

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“…The spectral profiles are plotted every 0.5 mm in Fig. 2c,f and fitted with scattering form factors 32,[34][35][36][37] . The technical details are given in Supplementary information.…”

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confidence: 99%

Direct observations of pure electron outflow in magnetic reconnection

Sakai

Moritaka

Morita

et al. 2022

Sci Rep

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Magnetic reconnection is a universal process in space, astrophysical, and laboratory plasmas. It alters magnetic field topology and results in energy release to the plasma. Here we report the experimental results of a pure electron outflow in magnetic reconnection, which is not accompanied with ion flows. By controlling an applied magnetic field in a laser produced plasma, we have constructed an experiment that magnetizes the electrons but not the ions. This allows us to isolate the electron dynamics from the ions. Collective Thomson scattering measurements reveal the electron Alfvénic outflow without ion outflow. The resultant plasmoid and whistler waves are observed with the magnetic induction probe measurements. We observe the unique features of electron-scale magnetic reconnection simultaneously in laser produced plasmas, including global structures, local plasma parameters, magnetic field, and waves.

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Competition of magnetic reconnections in self-generated and external magnetic fields

Sakai,

Huang,

Khasanah

et al. 2024

High Energy Density Physics

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Collective Thomson scattering measurements of electron feature using stimulated Brillouin scattering in laser-produced plasmas

Cited by 4 publications

References 17 publications

Collective Thomson scattering in non-equilibrium laser produced two-stream plasmas

Collective Thomson scattering in non-equilibrium laser produced two-stream plasmas

Direct observations of pure electron outflow in magnetic reconnection

Competition of magnetic reconnections in self-generated and external magnetic fields

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