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FAQ: Difference between revisions
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Q: How does one define the beam stop shadow? Is it possible to develop a simple method, e.g. the ignore circle and ignore rectangle of HKL2000? | Q: How does one define the beam stop shadow? Is it possible to develop a simple method, e.g. the ignore circle and ignore rectangle of HKL2000? | ||
A: VALUE_RANGE_FOR_TRUSTED_DETECTOR_PIXELS= masks shaded portions, and variation of its first parameter (values between 6000 and 9000) may be used to obtain the desired result (check with "XDS-Viewer BKGPIX.cbf"). UNTRUSTED_RECTANGLE= is probably the same as is available in HKL2000. | A: VALUE_RANGE_FOR_TRUSTED_DETECTOR_PIXELS= masks shaded portions, and variation of its first parameter (values between 6000 and 9000) may be used to obtain the desired result (check with "XDS-Viewer BKGPIX.cbf"). UNTRUSTED_RECTANGLE= is probably the same as is available in HKL2000. UNTRUSTED_ELLIPSE= is also available. | ||
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Q: All my crystals are split, and HKL200 has a hard time indexing the unit cell using sequential | Q: All my crystals are split, and HKL200 has a hard time indexing the unit cell using sequential | ||
frames. However, iMOSFLM does a really good job indexing using | frames. However, iMOSFLM does a really good job indexing using orthogonal frames. Can XDS | ||
index the unit cell using | index the unit cell using orthogonal frames? | ||
A: yes. You can define several SPOT_RANGE= keyword/parameter pairs, e.g. SPOT_RANGE=1 1 SPOT_RANGE=90 90 . Most likely it will be even better with SPOT_RANGE= 1 90 . Also see [[Indexing]]. | A: yes. You can define several SPOT_RANGE= keyword/parameter pairs, e.g. SPOT_RANGE=1 1 SPOT_RANGE=90 90 . Most likely it will be even better with SPOT_RANGE= 1 90 . Also see [[Indexing]]. | ||
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A: No. The INIT step uses the first 5 degrees (by default) for a number of purposes (check out the files written by INIT !). BKGINIT.cbf is essentially used only for scaling purposes; the ''real'' background calculation just requires those frames which have the reflections that are integrated. | A: No. The INIT step uses the first 5 degrees (by default) for a number of purposes (check out the files written by INIT !). BKGINIT.cbf is essentially used only for scaling purposes; the ''real'' background calculation just requires those frames which have the reflections that are integrated. | ||
== See also == | |||
[[Problems]] | |||