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

9th International Conference on Inertial Fusion Sciences and Applications

Kraus, D.^1 ; Döppner, T.^2 ; Kritcher, A.L.^2 ; Yi, A.^3 ; Boehm, K.^2 ; Bachmann, B.^2 ; Divol, L.^2 ; Fletcher, L.B.^4 ; Glenzer, S.H.^4 ; Landen, O.L.^2 ; Masters, N.^2 ; Saunders, A.M.^1 ; Weber, C.^2 ; Falcone, R.W.^1 ; Neumayer, P.^5

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;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012067/pdf
DOI  :  10.1088/1742-6596/717/1/012067

来源: IOP

【 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.