Filamentation in long scale length plasmas: Experimental evidence and effects of laser spatial incoherence

C. Labaune; S. Baton; T. Jalinaud; H. A. Baldis; D. Pesme

doi:10.1063/1.860027

Filamentation in long scale length plasmas: Experimental evidence and effects of laser spatial incoherence

C. Labaune
, S. Baton
, T. Jalinaud
, H. A. Baldis
, D. Pesme

Research output: Contribution to journal › Article › peer-review

Abstract

Signatures of filamentation have been observed in preformed plasmas using complementary diagnostics: time-resolved images of the transmitted laser light, dark field imaging, and time-resolved spectra of Raman light. This last diagnostic clearly shows the presence of small channels inside the plasma with temporal evolution in agreement with the formation of filaments. The filamentary structures disappeared when random phase plates were used in the laser beam. This result is in agreement with a theoretical analysis showing that filamentation does not grow when the speckle size is smaller than the perturbation wavelength which maximizes, in the coherent case, the filamentation growth.

Original language	English
Pages (from-to)	2224-2231
Number of pages	8
Journal	Physics of Fluids B
Volume	4
Issue number	7
DOIs	https://doi.org/10.1063/1.860027
Publication status	Published - 1 Jan 1992

Access to Document

10.1063/1.860027

Cite this

@article{4740fad84a8d4755bb0e45c7ee85dd24,

title = "Filamentation in long scale length plasmas: Experimental evidence and effects of laser spatial incoherence",

abstract = "Signatures of filamentation have been observed in preformed plasmas using complementary diagnostics: time-resolved images of the transmitted laser light, dark field imaging, and time-resolved spectra of Raman light. This last diagnostic clearly shows the presence of small channels inside the plasma with temporal evolution in agreement with the formation of filaments. The filamentary structures disappeared when random phase plates were used in the laser beam. This result is in agreement with a theoretical analysis showing that filamentation does not grow when the speckle size is smaller than the perturbation wavelength which maximizes, in the coherent case, the filamentation growth.",

author = "C. Labaune and S. Baton and T. Jalinaud and Baldis, \{H. A.\} and D. Pesme",

year = "1992",

month = jan,

day = "1",

doi = "10.1063/1.860027",

language = "English",

volume = "4",

pages = "2224--2231",

journal = "Physics of Fluids B",

issn = "0899-8221",

number = "7",

}

TY - JOUR

T1 - Filamentation in long scale length plasmas

T2 - Experimental evidence and effects of laser spatial incoherence

AU - Labaune, C.

AU - Baton, S.

AU - Jalinaud, T.

AU - Baldis, H. A.

AU - Pesme, D.

PY - 1992/1/1

Y1 - 1992/1/1

N2 - Signatures of filamentation have been observed in preformed plasmas using complementary diagnostics: time-resolved images of the transmitted laser light, dark field imaging, and time-resolved spectra of Raman light. This last diagnostic clearly shows the presence of small channels inside the plasma with temporal evolution in agreement with the formation of filaments. The filamentary structures disappeared when random phase plates were used in the laser beam. This result is in agreement with a theoretical analysis showing that filamentation does not grow when the speckle size is smaller than the perturbation wavelength which maximizes, in the coherent case, the filamentation growth.

AB - Signatures of filamentation have been observed in preformed plasmas using complementary diagnostics: time-resolved images of the transmitted laser light, dark field imaging, and time-resolved spectra of Raman light. This last diagnostic clearly shows the presence of small channels inside the plasma with temporal evolution in agreement with the formation of filaments. The filamentary structures disappeared when random phase plates were used in the laser beam. This result is in agreement with a theoretical analysis showing that filamentation does not grow when the speckle size is smaller than the perturbation wavelength which maximizes, in the coherent case, the filamentation growth.

U2 - 10.1063/1.860027

DO - 10.1063/1.860027

M3 - Article

AN - SCOPUS:0000852079

SN - 0899-8221

VL - 4

SP - 2224

EP - 2231

JO - Physics of Fluids B

JF - Physics of Fluids B

IS - 7

ER -

Filamentation in long scale length plasmas: Experimental evidence and effects of laser spatial incoherence

Abstract

Access to Document

Fingerprint

Cite this