Measurements of the Inverse Faraday Effect from Relativistic Laser Interactions with an Underdense Plasma

Z. Najmudin; M. Tatarakis; A. Pukhov; E. L. Clark; R.J. Clarke; A.E. Dangor; Jérôme Faure; Victor Malka; D. Neely; M. I. K. Santala; K. Krushelnick

Measurements of the Inverse Faraday Effect from Relativistic Laser Interactions with an Underdense Plasma

Z. Najmudin ¹ M. Tatarakis ¹ A. Pukhov ² E. L. Clark ¹ R.J. Clarke ³ A.E. Dangor ¹ Jérôme Faure ⁴ Victor Malka ⁴ D. Neely ³ M. I. K. Santala ¹ K. Krushelnick ¹

1 Blackett Laboratory

2 MPQ - Max-Planck-Institut für Quantenoptik

3 CLF - Central Laser Facility

4 LULI - Laboratoire pour l'utilisation des lasers intenses

Abstract : Magnetic fields in excess of 7 MG have been measured with high spatial and temporal precision during interactions of a circularly polarized laser pulse with an underdense helium plasma at intensities up to 1×10^19Wcm^-2. The fields, while of the form expected from the inverse Faraday effect for a cold plasma, are much larger than expected, and have a duration approaching that of the high intensity laser pulse ( <3psec). These observations can be explained by particle-in-cell simulations in 3D. The simulations show that the magnetic field is generated by fast electrons which spiral around the axis of the channel created by the laser field.

Document type :

Journal articles

Domain :

Physics [physics] / Physics [physics] / Optics [physics.optics]

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https://hal-polytechnique.archives-ouvertes.fr/hal-00520546
Contributor : Thuy Le <>
Submitted on : Thursday, September 23, 2010 - 3:35:12 PM
Last modification on : Thursday, March 21, 2019 - 2:27:29 PM

Measurements of the Inverse Faraday Effect from Relativistic Laser Interactions with an Underdense Plasma

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Measurements of the Inverse Faraday Effect from Relativistic Laser Interactions with an Underdense Plasma

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