Proton imaging of an electrostatic field structure formed in laser-produced counter-streaming plasmas

8th International Conference on Inertial Fusion Sciences and Applications

Morita, T.^1 ; Kugland, N.L.^2 ; Wan, W.^3 ; Crowston, R.^4 ; Drake, R.P.^3 ; Fiuza, F.^2 ; Gregori, G.^5 ; Huntington, C.^2 ; Ishikawa, T.^6 ; Koenig, M.^7 ; Kuranz, C.^3 ; Levy, M.C.^2,8 ; Martinez, D.^2 ; Meinecke, J.^5 ; Miniati, F.^9 ; Murphy, C.D.^10 ; Pelka, A.^7 ; Plechaty, C.^2 ; Presura, R.^11 ; Quirós, N.^11 ; Remington, B.A.^2 ; Reville, B.^12 ; Ross, J.S.^2 ; Ryutov, D.D.^2 ; Sakawa, Y.^13 ; Steele, L.^14 ; Takabe, H.^13 ; Yamaura, Y.^6 ; Woolsey, N.^4 ; Park, H.-S.^2

Department of Energy Engineering Science, Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka

816-8580, Japan^1

Lawrence Livermore National Laboratory, P.O. Box 808, Livermore

CA

94550, United States^2

Department of Atmospheric Oceanic and Space Sciences, University of Michigan, Ann Arbor

MI

48109, United States^3

University of York, North-Yorkshire-York

YO10 5DD, United Kingdom^4

Department of Physics, University of Oxford, Parks Road, Oxford

OX1 3PU, United Kingdom^5

Graduate School of Science, Osaka University, 1-1 Machikane-yama, Osaka Toyonaka

560-0043, Japan^6

Laboratoire pour l'Utilisation des Lasers Intenses (LULI), École Polytechnique-Univ, Paris VI, Palaiseau

91128, France^7

Rice University, Houston

TX

77251, United States^8

Physics Department, ETH-Zürich, Wolfgang-Pauli-Strasse 27, Zürich

CH-8093, Switzerland

(10) University of Edinburgh, Edinburgh

EH8 9YL, United Kingdom

(11) University of Nevada, Reno

NV

89557, United States

(12) Centre for Plasma Physics, Queen's University Belfast, University Rd, Belfast

BT7 1NN, United Kingdom

(13) Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Osaka Suita

565-0871, Japan

(14) University of California, Davis

CA

95616, United States^9

关键词: Collisionless;    Electrostatic shocks;    Field structures;    Measurements of;    Proton imaging;    Proton kinetic energies;    Streaming plasma;    Transition regions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012071/pdf
DOI  :  10.1088/1742-6596/688/1/012071

来源: IOP

【 摘 要 】

We report the measurements of electrostatic field structures associated with an electrostatic shock formed in laser-produced counter-streaming plasmas with proton imaging. The thickness of the electrostatic structure is estimated from proton images with different proton kinetic energies from 4.7 MeV to 10.7 MeV. The width of the transition region is characterized by electron scale length in the laser-produced plasma, suggesting that the field structure is formed due to a collisionless electrostatic shock.