Measurement and models of bent KAP(001) crystal integrated reflectivity and resolution (invited).

The Advanced Light Source beamline-9.3.1 x-rays are used to calibrate the rocking curve of bent potassium acid phthalate (KAP) crystals in the 2.3-4.5 keV photon-energy range. Crystals are bent on a cylindrically convex substrate with a radius of curvature ranging from 2 to 9 in. and also including the flat case to observe the effect of bending on the KAP spectrometric properties. As the bending radius increases, the crystal reflectivity converges to the mosaic crystal response. The X-ray Oriented Programs (xop) multi-lamellar model of bent crystals is used to model the rocking curve of these crystals and the calibration data confirm that a single model is adequate to reproduce simultaneously all measured integrated reflectivities and rocking-curve FWHM for multiple radii of curvature in both 1st and 2nd order of diffraction.

[1]  G. Loisel,et al.  Calibrated simulations of Z opacity experiments that reproduce the experimentally measured plasma conditions. , 2016, Physical review. E.

[2]  M. J. Haugh,et al.  Determining the diffraction properties of a cylindrically bent KAP(001) crystal from 1 to 5 keV , 2015, SPIE Optical Engineering + Applications.

[3]  Xianbo Shi,et al.  Simulation of X-ray diffraction profiles for bent anisotropic crystals , 2015, 1502.03059.

[4]  G. Loisel,et al.  A higher-than-predicted measurement of iron opacity at solar interior temperatures , 2014, Nature.

[5]  G. Loisel,et al.  Measuring the x-ray resolving power of bent potassium acid phthalate diffraction crystals. , 2014, The Review of scientific instruments.

[6]  G. Loisel,et al.  A methodology for calibrating wavelength dependent spectral resolution for crystal spectrometers. , 2012, The Review of scientific instruments.

[7]  O. Chubar,et al.  Front Matter: Volume 8141 , 2011 .

[8]  P.A. Corcoran,et al.  Status of the Z pulsed power driver , 2011, 2011 IEEE Pulsed Power Conference.

[9]  G. Rochau,et al.  Experimental investigation of opacity models for stellar interior, inertial fusion, and high energy density plasmas , 2008 .

[10]  R. G. Adams,et al.  Pulsed-power-driven high energy density physics and inertial confinement fusion research , 2004 .

[11]  G. Chandler,et al.  Diagnostics on Z (invited) , 2001 .

[12]  B. L. Henke,et al.  X-Ray Interactions: Photoabsorption, Scattering, Transmission, and Reflection at E = 50-30,000 eV, Z = 1-92 , 1993 .

[13]  R. J. Speer,et al.  SPECTRA OF HIGHLY IONIZED NEON AND ARGON IN A PLASMA FOCUS DISCHARGE. , 1969 .

[14]  W. Zachariasen.  Theory of X‐ray diffraction in crystals with stacking faults , 1967 .

[15]  B. Cullity,et al.  Elements of X-ray diffraction , 1957 .

[16]  S.E. Rosenthal,et al.  The ZR refurbishment project , 2002, Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop..

[17]  L. S. Birks.  Convex Curved Crystal X‐Ray Spectrograph , 1970 .