Differential transmission of a layer of average proteins ( C, 50% H, 8% O, 8% N), lipids ( C, 64% H, 4% O), carbohydrates ( C, 50% H, 25% O), replacing the same thickness of water: e.g. , a thick drop of lipid transmits 15% less than the water it replaces. The contrast between such a drop and the surrounding water will be 15%, and the attenuation length in water is .
Average diffraction limited resolution at , attainable in 3D tomographic images as a function of sample thickness.
Absorption coefficients of elements 1–29 in a solid or liquid phase at , showing the best candidates for an emitting oxide target.
Energy spectrum of the radiation emitted by a BeO target under a electron beam (uncorrected for detector sensitivity, strongly decreasing above ). The reflectivity of a nickel surface ( rms roughness) is also plotted.
Proposed layout of the condenser mirror and microscope.
Encircled fraction of the total power emitted by a gaussian source ( FWHM), in the image plane of a long ellipsoidal mirror for different slope errors randomly distributed along the mirror surface. Source to image distance , central diameter , and input aperture from the source.
Comparison of the thickness to resolution ratio for several 3D imaging techniques for biology. WW-TXM allows 3D imaging of thick samples. Dashed lines show some typical lateral resolutions.
Compared absorption of soft x-rays by gold and a few materials that may be obtained in nm size crystals and functionalized to make specific probes (quantum dots).
Calculated values of the critical parameters of a WW-TXM for a few standard cases. The underlying assumptions are: , 100% detector efficiency, 10% ZP efficiency, photon energy, 6% transmission object ( thick cell with 20% carbon content), source object distance , rms slope errors on the mirror.
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