TITLE

Temporally and spatially resolved measurements of multi-megagauss magnetic fields in high intensity laser-produced plasmas

AUTHOR(S)
Gopal, A.; Tatarakis, M.; Beg, F. N.; Clark, E. L.; Dangor, A. E.; Evans, R. G.; Norreys, P. A.; Wei, M. S.; Zepf, M.; Krushelnick, K.
PUB. DATE
December 2008
SOURCE
Physics of Plasmas;Dec2008, Vol. 15 Issue 12, p122701
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report spatially and temporally resolved measurements of self-generated multi-megagauss magnetic fields produced during ultrahigh intensity laser plasma interactions. Spatially resolved measurements of the magnetic fields show an asymmetry in the distribution of field with respect to the angle of laser incidence. Temporally resolved measurements of the self-generated third harmonic suggest that the strength of the magnetic field is proportional to the square root of laser intensity (i.e., the laser B-field) during the rise of the laser pulse. The experimental results are compared with numerical simulations using a particle-in-cell code which also shows clear asymmetry of the field profile and similar magnetic field growth rates and scalings.
ACCESSION #
35982564

 

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