The X-ray Imaging and Spectroscopy Mission (XRISM) is a Collaborative Mission jointly developed by NASA and the Japanese Space Agency (JAXA), with the European Sapace Agency (ESA) participation. It will have Two instruments: Resolve - a soft X-ray (0.3-12 keV) spectrometer providing non-dispersive high-resolution X-ray spectroscopy; and Xtend - a 40 arcminute field of view soft X-ray imager....
I will present the results of experiments at LCLS where we created and diagnosed iron plasma at temperature exceeding 1keV, and at solid iron (atomic) densities, with bulk electron densities greater than 2×10^24/cm^3. Using photon energies between 7100eV and 9000eV and pulse lengths less than 100 femtoseconds, we focussed the LCLS beam to a 120nm focal spot. A 2micron thin iron sample was...
Neutron star (NS) mergers are at the origin of gravitational waves (GW) detected by LIGO/Virgo interferometers. Such events produce a large amount of elements heavier than iron by a rapid neutron capture (r-process) nucleosynthesis. Among these elements, those belonging to the fifth row of the periodic table, in particular from Zr ($Z$ = 40) and Cd ($Z$ = 48), are the greatest contributors to...
Recent measurements at the Sandia National Laboratory of the x-ray transmission of iron plasma much higher than predicted by theory have cast doubt on modelling of iron x-ray radiative opacity at conditions close to the solar convective zone-radiative zone boundary. An increased radiative opacity of the solar mixture, in particular iron, is a possible explanation for the disagreement in the...
Since solar abundance was renewed in 2005, solar models and helioseismology disagree. One hypothesis is that calculated iron opacity used in the solar model is underestimated. In 2015, we measured Fe opacity at solar interior temperatures using Z machine at Sandia National Laboratories and revealed significant disagreement with calculated opacities. If true, it can partially resolve the...
The magnetic field is extremely important for understanding the properties of the solar corona. However, there are still difficulties in the direct measurement of the coronal magnetic field. The magnetic-field-induced transition (MIT) in Fe X, appearing in coronal spectra, was discovered to have prospective applications in coronal magnetic
field measurements. In this work, we obtained the...
