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Spatially Resolved High Resolution X-Ray Crystal Spectrometry and Radiation Tolerant 2D X-Ray Imaging Schemes for ICF Plasmas including NIF Ignition Experiments
• Continuously spatially resolved high resolution x-ray spectra
• Simple – 1 spherically bent crystal and 1 2D detector
• Has revolutionized physics of self-generated flows and thermal transport in tokamaks
• Mature diagnostic – deployed on 7 spectrometers in 4 countries
• Primary diagnostic for ion temperature and rotation profiles on ITER
• We are doing the ITER conceptual design
• Will work for HED plasmas
• Would allow extensive shielding against neutrons for NIF ignition experiments
• Two dimensional x-ray imaging
• Matched pair of spherical crystals
• 10,000 times larger solid angle than pinhole imager
• Magnification possible
• Will allow extensive shielding of line-of-sight neutrons and detector for NIF ignition
• High efficiency of x-ray detection – no conversion losses
1
Spherically bent crystal wavelength-disperses x rays horizontally and images them vertically
Bragg relation =2d sin)
Spherically bent crystal
Rotational axis of symmetry
Sagittal focalline
C-Mod spectral image
Verticalfocus
fm=R sin
Astigmatism can be eliminated by using a matched pair of spherically bent crystals
objectimage
Concave crystal
convexcrystal convex-concave pair
provides magnification
Schemes tested in visible light.
To be tested with x rays.