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]
Magnetic field measurements in laser-produced plasmas via proton deflectometry / C. A., Cecchetti; M., Borghesi; J., Fuchs; G., Schurtz; S., Kar; A., Macchi; L., Romagnani; P. A., Wilson; Antici, Patrizio; R., Jung; J., Osterholtz; C. A., Pipahl; O., Willi; Schiavi, Angelo; M., Notley; D., Neely. - In: PHYSICS OF PLASMAS. - ISSN 1070-664X. - STAMPA. - 16:4(2009), p. 043102. [10.1063/1.3097899]
Magnetic field measurements in laser-produced plasmas via proton deflectometry
ANTICI, PATRIZIO;SCHIAVI, ANGELO;
2009
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]I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
