| Issue |
Europhys. Lett.
Volume 50, Number 4, May II 2000
|
|
|---|---|---|
| Page(s) | 480 - 486 | |
| Section | Physics of gases, plasmas, and electric discharges | |
| DOI | https://doi.org/10.1209/epl/i2000-00294-2 | |
| Published online | 01 September 2002 | |
Intense self-generated magnetic field in the interaction of a femtosecond laser pulse with an underdense plasma
Laboratoire de Physique des Milieux Ionisés, UMR 287, CNRS, Ecole Polytechnique
91128 Palaiseau Cedex, France
Received:
11
August
1999
Accepted:
7
March
2000
The interaction of femtosecond 
laser pulses with an underdense gas at moderate laser
intensity of 3–
is studied. We report especially on time-resolved measurements
of intense self-generated magnetic fields above 30 T at the given irradiance using a pump probe
device with a Faraday rotation diagnosis on the probe pulse. The induced magnetic field is found
far above the one predicted by the inverse Faraday effect. The theoretical mechanism responsible
for this strong field production is identified as a self-ponderomotive effect induced by the pump
pulse.
PACS: 52.60.+h – Relativistic plasma / 52.35.Mw – Nonlinear waves and nonlinear wave propagation (including paramagnetic effects, mode coupling, ponderomotive effects, etc.) / 52.40.Nk – Laser plasma interactions (e.g., anomalous absorption, backscattering, magnetic field generation, fast particle generation)
© EDP Sciences, 2000
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