Ultrafast proton radiography of the magnetic fields generated by a laser-driven coil current

Lan Gao, Hantao Ji, Gennady Fiksel, William Fox, Michelle Evans, Noel Alfonso

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

Magnetic fields generated by a current flowing through a U-shaped coil connecting two copper foils were measured using ultrafast proton radiography. Two ∼1.25 kJ, 1-ns laser pulses propagated through laser entrance holes in the front foil and were focused to the back foil with an intensity of ∼3 × 1016W/cm2. The intense laser-solid interaction induced a high voltage between the copper foils and generated a large current in the connecting coil. The proton data show ∼40-50 T magnetic fields at the center of the coil ∼3-4 ns after laser irradiation. The experiments provide significant insight for future target designs that aim to develop a powerful source of external magnetic fields for various applications in high-energy-density science.

Original languageEnglish (US)
Article number043106
JournalPhysics of Plasmas
Volume23
Issue number4
DOIs
StatePublished - Apr 1 2016

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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