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Title: Spatio-temporal evolution of magnetosonic wave in the laser plasma interaction

Abstract

This paper presents a theoretical model for the transient response of nonlinear coupling between magnetosonic wave and ion acoustic wave in the overdense plasma. Filamentation of magnetosonic wave has been considered to be responsible for magnetic turbulence during the laser plasma interaction. The ion acoustic wave gets excited due to the ponderomotive force exerted by magnetosonic wave and this ion acoustic wave in turn generates perturbation in the background density in the form of spatial density harmonics. Numerical simulation has been carried out for dimensionless coupled equations of magnetosonic wave and ion acoustic wave; and the results show quite complex localized structures that grow with time. The power spectrum has also been studied which shows that the spectral index follows an approximate scaling of the order of ∼k{sup −2.4} at smaller scales. The data obtained from numerical simulation are used in semi analytical model to better understand the mechanism of nonlinear evolution of magnetosonic wave. The results indicate considerable randomness in the spatial structure of the magnetic field profile which gives sufficient indication of turbulence.

Authors:
; ;  [1];  [1];  [2];  [1];  [3];  [4]
  1. Centre for Energy Studies, Indian Institute of Technology Delhi, Delhi 110016 (India)
  2. (Deemed University), DayalBagh, Agra 282005 (India)
  3. (India)
  4. Department of Physics and Computer Science, Dayal Bagh Educational Institute(Deemed University), DayalBagh, Agra 282005 (India)
Publication Date:
OSTI Identifier:
22410310
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPUTERIZED SIMULATION; DISTURBANCES; HARMONICS; INTERACTIONS; ION ACOUSTIC WAVES; LASERS; MAGNETIC FIELDS; MAGNETOACOUSTIC WAVES; NONLINEAR PROBLEMS; PLASMA; PONDEROMOTIVE FORCE; SPECTRA; TURBULENCE

Citation Formats

Sharma, R. P., E-mail: rpsharma@ces.iitd.ac.in, Singh, Ram Kishor, E-mail: ram007kishor@gmail.com, Sharma, Swati, E-mail: swati.sharma704@gmail.com, Tiwary, Prem Pyari, E-mail: prempyari@gmail.com, Department of Physics and Computer Science, Dayal Bagh Educational Institute, Modi, K. V., E-mail: kvmodi.iitd@gmail.com, Mechanical Engineering Department, Government Engineering College Valsad, Gujarat 396001, and Satsangi, V. R. Spatio-temporal evolution of magnetosonic wave in the laser plasma interaction. United States: N. p., 2015. Web. doi:10.1063/1.4921132.
Sharma, R. P., E-mail: rpsharma@ces.iitd.ac.in, Singh, Ram Kishor, E-mail: ram007kishor@gmail.com, Sharma, Swati, E-mail: swati.sharma704@gmail.com, Tiwary, Prem Pyari, E-mail: prempyari@gmail.com, Department of Physics and Computer Science, Dayal Bagh Educational Institute, Modi, K. V., E-mail: kvmodi.iitd@gmail.com, Mechanical Engineering Department, Government Engineering College Valsad, Gujarat 396001, & Satsangi, V. R. Spatio-temporal evolution of magnetosonic wave in the laser plasma interaction. United States. doi:10.1063/1.4921132.
Sharma, R. P., E-mail: rpsharma@ces.iitd.ac.in, Singh, Ram Kishor, E-mail: ram007kishor@gmail.com, Sharma, Swati, E-mail: swati.sharma704@gmail.com, Tiwary, Prem Pyari, E-mail: prempyari@gmail.com, Department of Physics and Computer Science, Dayal Bagh Educational Institute, Modi, K. V., E-mail: kvmodi.iitd@gmail.com, Mechanical Engineering Department, Government Engineering College Valsad, Gujarat 396001, and Satsangi, V. R. Fri . "Spatio-temporal evolution of magnetosonic wave in the laser plasma interaction". United States. doi:10.1063/1.4921132.
@article{osti_22410310,
title = {Spatio-temporal evolution of magnetosonic wave in the laser plasma interaction},
author = {Sharma, R. P., E-mail: rpsharma@ces.iitd.ac.in and Singh, Ram Kishor, E-mail: ram007kishor@gmail.com and Sharma, Swati, E-mail: swati.sharma704@gmail.com and Tiwary, Prem Pyari, E-mail: prempyari@gmail.com and Department of Physics and Computer Science, Dayal Bagh Educational Institute and Modi, K. V., E-mail: kvmodi.iitd@gmail.com and Mechanical Engineering Department, Government Engineering College Valsad, Gujarat 396001 and Satsangi, V. R.},
abstractNote = {This paper presents a theoretical model for the transient response of nonlinear coupling between magnetosonic wave and ion acoustic wave in the overdense plasma. Filamentation of magnetosonic wave has been considered to be responsible for magnetic turbulence during the laser plasma interaction. The ion acoustic wave gets excited due to the ponderomotive force exerted by magnetosonic wave and this ion acoustic wave in turn generates perturbation in the background density in the form of spatial density harmonics. Numerical simulation has been carried out for dimensionless coupled equations of magnetosonic wave and ion acoustic wave; and the results show quite complex localized structures that grow with time. The power spectrum has also been studied which shows that the spectral index follows an approximate scaling of the order of ∼k{sup −2.4} at smaller scales. The data obtained from numerical simulation are used in semi analytical model to better understand the mechanism of nonlinear evolution of magnetosonic wave. The results indicate considerable randomness in the spatial structure of the magnetic field profile which gives sufficient indication of turbulence.},
doi = {10.1063/1.4921132},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 22,
place = {United States},
year = {2015},
month = {5}
}