Magnetic field measurements in laser-produced plasmas via proton deflectometry

Year: 2009

Authors: Cecchetti C.A., Borghesi M., Fuchs J., Schurtz G., Kar S., Macchi A., Romagnani L., Wilson P.A., Antici P., Jung R., Osterholtz J., Pipahl C.A., Willi O., Schiavi A., Notley M., Neely D.

Autors Affiliation: School of Mathematics and Physics, Queen’s University of Belfast, Belfast BT7 1NN, United Kingdom;
LULI, École Polytechnique, CNRS/CEA/UPMC, Route de Saclay, 91128 Palaiseau, France;
Centre d’Etudies des Lasers Intenses et Applications, Universitè Bordeaux I, UMR 5107, CNRS, CEA, 33405 Talence, France;
Institut für Laser und Plasma Physik, Heinrich-Heine-Universität Düsseldorf, 40225 Dusseldorf, Germany;
Dipartimento di Energetica, Università di Roma 1 “La Sapienza,” via Scarpa 14-16, 00161 Roma, Italy;
Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom

Abstract: Large magnetic fields generated during laser-matter interaction at irradiances of similar to 5 X 10(14) W cm(-2) have been measured using a deflectometry technique employing MeV laser-accelerated protons. Azimuthal magnetic fields were identified unambiguously via a characteristic proton deflection pattern and found to have an amplitude of similar to 45 T in the outer coronal region. Comparison with magnetohydrodynamic simulations confirms that in this regime the (del) over right arrowT(e) X (del) over right arrown(e) source is the main field generation mechanism, while additional terms are negligible. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3097899]

Journal/Review: PHYSICS OF PLASMAS

Volume: 16 (4)      Pages from: 043102  to: 043102

KeyWords: laser-plasma interactions; proton imaging; magnetic fields measurements
DOI: 10.1063/1.3097899

Citations: 61
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