Platform for spectrally resolved x-ray scattering from imploding capsules at the National Ignition Facility

[摘要] We present a new experimental platform to perform spectrally resolved x-ray scattering measurements of ionization, density and temperature in imploding CH or beryllium capsules at the National Ignition Facility. Scattered x-rays at 9 keV from a zinc He-alpha plasma source at a scattering angle of 120 degrees are highly sensitive to K-shell ionization, while at the same time constraining density and temperature. This platform will allow for x-ray scattering studies of dense plasmas with free electron densities up to 1025cm-3giving the possibility to investigate effects of pressure ionization and Pauli blocking on the ablator ionization state right before or shortly after stagnation of the implosion.

[发布机构] Department of Physics, University of California, Berkeley; CA; 94720, United States^1;Lawrence Livermore National Laboratory, Livermore; CA; 94550, United States^2;Los Alamos National Laboratory, Los Alamos; NM; 87545, United States^3;SLAC National Accelerator Laboratory, Menlo Park; CA; 94309, United States^4;GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt; 64291, Germany^5

[关键词] Experimental platform;Free-electron density;Investigate effects;K-shell ionization;National ignition facility;Pressure ionization;Scattering angles;X-ray scattering measurements