Difference between revisions of "Brilliance"
From Online Dictionary of Crystallography
BrianMcMahon (talk | contribs) (Tidied translations and added German and Spanish (U. Mueller)) |
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| − | <font color="blue">Brillance</font> (''Fr''). | + | <font color="blue">Brillance</font> (''Fr''). <font color="red">Brillanz, Glanz</font> (''Ge''). <font color="green">Brillo</font> (''Sp''). |
In contrast to [[brightness]], '''brilliance''' additionally takes the beam dimensions into account and is defined as brightness per mm<sup>2</sup>. The unit is p.p.s. <math>\times</math>mm<sup>2</sup> <math>\times</math>mrad<sup>2</sup>. Brilliance is maximized by making the beam size and divergence as small as possible, and the photon flux as large as possible. Two X-ray beams may have the same flux density but different brilliance if the two beams have different beam divergence. Brilliance is thus an appropriate parameter to use when comparing two X-ray sources with different focal spot sizes. | In contrast to [[brightness]], '''brilliance''' additionally takes the beam dimensions into account and is defined as brightness per mm<sup>2</sup>. The unit is p.p.s. <math>\times</math>mm<sup>2</sup> <math>\times</math>mrad<sup>2</sup>. Brilliance is maximized by making the beam size and divergence as small as possible, and the photon flux as large as possible. Two X-ray beams may have the same flux density but different brilliance if the two beams have different beam divergence. Brilliance is thus an appropriate parameter to use when comparing two X-ray sources with different focal spot sizes. | ||
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Latest revision as of 16:49, 9 November 2017
Brillance (Fr). Brillanz, Glanz (Ge). Brillo (Sp).
In contrast to brightness, brilliance additionally takes the beam dimensions into account and is defined as brightness per mm2. The unit is p.p.s. [math]\times[/math]mm2 [math]\times[/math]mrad2. Brilliance is maximized by making the beam size and divergence as small as possible, and the photon flux as large as possible. Two X-ray beams may have the same flux density but different brilliance if the two beams have different beam divergence. Brilliance is thus an appropriate parameter to use when comparing two X-ray sources with different focal spot sizes.