Ice rings: Difference between revisions

Ice rings (view source)

25 bytes added , 21 November 2007

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 * Please see [[Wishlist#Would be nice to have]]: there's a list of additional (high-) resolution ranges one might want to exclude (in [[CORRECT]]).
-* A currently possible way to prevent ice rings from spoiling the [[IDXREF]] step is to set TRUSTED_REGION=0 <some small value> for INIT, where <some small value> is calculated such that ice rings are excluded. <br /> Drawbacks: a) <some small value> needs to be calculated by Bragg's law (the formula <math>\frac{Wavelength \cdot Distance} {2 \cdot NX \cdot QX}</math> should give approx. 4 Å cutoff). b) after successful indexing, INIT needs to be re-run.
+* A currently possible way to prevent ice rings from spoiling the [[IDXREF]] step is to set "TRUSTED_REGION=0 X" for INIT, where X is calculated such that ice rings are excluded. Using Bragg's law and an approximation, we find that <br /> X = <math>\frac{Wavelength \cdot Distance} {2 \cdot NX \cdot QX}</math> should give approx. 4 Å cutoff, which should exclude all ice rings. <br /> Drawback: after successful indexing, INIT needs to be re-run with "TRUSTED_REGION=0 1.05" or so.
-* Please see [[Optimization]] for how to treat remaining ice reflections showing up as "Aliens" in [[CORRECT.LP]].
+* Please see [[Optimization]] for how to treat remaining ice reflections showing up as "aliens" in [[CORRECT.LP]].