Resonant Polarization Spectroscopy for Hot X-ray Plasmas
نویسنده
چکیده
X-ray line polarization spectroscopy is a method of choice for probing hot plasma conditions. The precise roles of resonant structures in this method have not been realized and fully understood. With a sophisticated relativistic close coupling Dirac R-matrix calculation of polarized radiation of the quadrupole magnetic M2 line at 2.717 Å in Ba, we revealed the nature of resonant structures in x-ray line polarization spectroscopy. We found that signatures with a heavy resonance forest imprinting on polarization may be used for a sensitive new spectroscopic method. The resonant polarization spectrum was used to determine or constrain the directional beam electron distribution of the laboratory Ba plasma. Our results provide a start of resonant polarization spectroscopy as a method for diagnostics of laboratory, fusion and astrophysical plasma source conditions.
منابع مشابه
X-ray polarization spectroscopy to study energy transport in ultra-high intensity laser produced plasmas
X-ray polarization spectroscopy was studied to derive directly the velocity distribution function (VDF) of hot electrons propagating in plasma created with a high intensity laser pulse. Polarization measurement was made at around 10 W/cm using a laser pulse (~10 J in ~1 ps) from Alisé facility at CEA/CESTA. Chlorinated triple-layer targets were irradiated, and Cl He line was observed with an x-...
متن کاملPolarization spectroscopy model for 3-dimensional electron velocity distribution
INTRODUCTION Recent advances in ultra-short pulse, high-intensity lasers have opened up possibility of performing novel experiments in fields such as fast-ignitor [1, 2], particle acceleration [3-6], and short pulse x-ray generation [7]. Efficient energy transport from laser to dense plasma is a critical issue for all of these applications. There are two kinds of electrons in plasmas generated ...
متن کاملNanoscale femtosecond imaging of transient hot solid density plasmas with elemental and charge state sensitivity using resonant coherent diffraction
Here we propose to exploit the low energy bandwidth, small wavelength and penetration power of ultrashort pulses from XFELs for resonant Small Angle Scattering (SAXS) on plasma structures in laser excited plasmas. Small angle scattering allows to detect nanoscale density fluctuations in forward scattering direction. Typically, the SAXS signal from laser excited plasmas is expected to be dominat...
متن کاملPlasma Conditions for Optimum Gain in Resonant Photoexcitation of Strontium Neon-like Ions by Aluminium Radiation
Resonant photoexcitation of strontium neon-like ions by the radiation of aluminium hydrogen-like ions is studied theoretically and experimentally in laser-created plasmas. X-ray and X W spectroscopy are used as tools to define plasma conditions where photo-pumping is efficient. The design of targets is completed by ablation studies of strontium layers under various experimental conditions. Abso...
متن کاملEvaluation of corrosion behaviour on Mn-Cr austenitic steels using 0.1 M HCl solution
One of the attractive low activation steels is the austenitic Mn-Cr steel from the view point of waste disposal because of few long-lived nuclides. In this paper, three types of Mn-Cr austenitic steels were fabricated by vacuum induction furnace. Then plates with 10 mm thickness were fabricated by hot-rolling. The physical metallurgy of these steels was studied by the corrected Schaeffler diagr...
متن کامل