leonarski_fandClaude Opus 5
a0db11193a
The comment, the usage text and the advanced docs all said reflections coarser than 50 A are "behind or beside the beam stop", which invites the conclusion that beam-stop masking makes the limit redundant. Measured, it does not. On raw images, the azimuthal background in the pixels the shadow mask leaves OPEN is 30-44% of the field value out to ~34 px and recovers to 95% of it only at d ~ 52 A: the stop suppresses air scatter well beyond the shadow it casts. A background ring inside that zone over-estimates the background, so the intensity comes out negative - 74% of the reflections coarser than 50 A on that geometry, against 2% in the shell just inside it, and they sit a median 15 px clear of the mask (reflections touching the mask are only 33% negative). The mask covers 47-79% of the area coarser than 50 A across three datasets, so the part that matters is exactly the part it leaves open. The zone is set by the stop's angular size, so it tracks wavelength rather than detector distance, which is what makes a fixed d limit reasonable. Freeing the limit on the most affected large-cell dataset in the corpus adds 1329 observations (+0.11%), moves I/sigma 7.01 -> 7.00 and completeness not at all, and stretches the declared low-resolution range from 46 A to 102 A on the strength of mostly-negative data. The advanced docs additionally told large-cell users to change the setting, implying recoverable data; corrected. "The value XDS configurations use" is also sharpened: every dataset here whose XDS.INP leaves INCLUDE_RESOLUTION_RANGE unset reports 50.000 in CORRECT.LP, so 50 A is XDS's own program default rather than a habit of our inputs. No behaviour change. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01EFEJG6WBQv8th4UJFNe53N
Jungfraujoch
Application to receive data from the PSI JUNGFRAU and EIGER detectors.
All documentation is now placed in docs/ subdirectory and for the current version hosted on Jungfraujoch Read The Docs page.