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Measurement of local density and magnetic field of a magnetized plasma using Raman scattering from a focused laser pulse

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Title
Measurement of local density and magnetic field of a magnetized plasma using Raman scattering from a focused laser pulse
Author(s)
Song H.S.; Myung-Hoon Cho; Kim Y.-K.; Kang T.; Suk H.; Hur M.S.
Publication Date
2016-01
Journal
PLASMA PHYSICS AND CONTROLLED FUSION, v.58, no.2, pp.025006 -
Publisher
IOP PUBLISHING LTD
Abstract
We investigated the possibility of pin pointing the local density and magnetic field of an inhomogeneous, magnetized plasma by stimulated Raman scattering of a pump laser pulse focused on a desired position. As the Raman growth rate is proportional to the pump pulse amplitude, the spectral peak shift of the scattered signal is, though it is a spatially integrated one, expected to be determined dominantly by that from the focal position of the pump pulse. From a theoretical estimation, we found a condition of the pulse duration and plasma density for such an expectation to properly work. It was confirmed by two-dimensional particle-in-cell simulations that as long as the pulse duration is long and the length scale of the plasma inhomogeneity is large compared to the Rayleigh length, the spectral bandwidth of the spatially integrated Raman signal can be narrow enough to distinguish the peak position with good enough resolution. © 2016 IOP Publishing Ltd
URI
https://pr.ibs.re.kr/handle/8788114/2410
ISSN
0741-3335
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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CHO,MH_Measurement of local _Plamsa Physics of Controlled Fusion, V58 p025006).pdfDownload

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