Relativistic intensity laser interactions with low-density plasmas

8th International Conference on Inertial Fusion Sciences and Applications

Willingale, L.^1 ; Nilson, P.M.^1 ; Zulick, C.^1 ; Chen, H.^3 ; Craxton, R.S.^2 ; Cobble, J.^4 ; Maksimchuk, A.^1 ; Norreys, P.A.^5 ; Sangster, T.C.^2 ; Scott, R.H.H.^5 ; Stoeckl, C.^2

Center for Ultrafast Optical Science, University of Michigan, 2200 Bonisteel Boulevard, Ann Arbor

MI

48109, United States^1

University of Rochester, Laboratory for Laser Energetics, Rochester

NY

14623, United States^2

Lawrence Livermore National Laboratory, Livermore

CA

94551, United States^3

Los Alamos National Laboratory, NM, United States^4

Central Laser Facility, Rutherford Appleton Laboratory, Oxfordshire, United Kingdom^5

关键词: Channeling phenomena;    Function of time;    Low-density plasmas;    Momentum conserving;    Particle acceleration;    Relativistic intensity;    Single channels;    Underdense plasmas;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012126/pdf
DOI  :  10.1088/1742-6596/688/1/012126

来源: IOP

【 摘 要 】

We perform relativistic-intensity laser experiments using the Omega EP laser to investigate channeling phenomena and particle acceleration in underdense plasmas. A fundamental understanding of these processes is of importance to the hole-boring fast ignition scheme for inertial confinement fusion. Proton probing was used to image the electromagnetic fields formed as the Omega EP laser pulse generated a channel through underdense plasma. Filamentation of the channel was observed, followed by self-correction into a single channel. The channel radius as a function of time was found to be in reasonable agreement with momentum- conserving snowplough models.