Lorentz Mapping of Magnetic Fields in Hot Dense Plasmas

• Main Authors: Amendt, P. A. (Author), Ross, J. S. (Author), Seguin, Fredrick Hampton (Contributor), Town, R. P. J. (Author), Bettie, R. (Author), Li, Chikang (Contributor), Knauer, J. P. (Author), Frenje, Johan A. (Contributor), Rygg, J. R. (Contributor), Meyerhofer, D. D. (Author), Patel, P. K. (Author), Landen, O. L. (Author), Froula, O. (Author), Petrasso, Richard D. (Contributor)
• Other Authors: Massachusetts Institute of Technology. Plasma Science and Fusion Center (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2010-02-05T15:07:34Z.
• Subjects: Article
• Online Access: Get fulltext

Unique detection of electromagnetic fields and identification of field type and strength as a function of position were used to determine the nature of self-generated fields in a novel experiment with laser-generated plasma bubbles on two sides of a plastic foil. Field-induced deflections of monoenergetic 15-MeV probe protons passing through the two bubbles, measured quantitatively with proton radiography, were combined with Lorentz mapping to provide separate measurements of magnetic and electric fields. The result was absolute identification and measurement of a toroidal magnetic field around each bubble and determination that any electric field component parallel to the foil was below measurement uncertainties.
Lawrence Livermore National Laboratory
Office of Defense Programs
National Laser Users Facility
Department of Energy
University of Rochester Fusion Science Center