leonarski_fandClaude Opus 5
3a30dc8ab5
C 1 1 2 and C 1 1 2_1 are the only two monoclinic settings whose change of basis from the reference has determinant 1/2, and the reason is physical: with unique axis c the C-centring vector lies wholly in the oblique a-b plane and reduces away. Such a group is never a distinct Bravais centring - it is a primitive lattice written on twice the cell - and it wins the candidate table only because the table is scored on that doubled cell, where half the reflection positions are absent by construction. Refusing to enumerate those settings was measured and is worse: the volume-preserving alternative keeps the by-construction absences as real observations and merges no better than P1. So keep the enumeration as it is and act on the win instead: halve the cell, re-classify in the group's own system, carry the reflections across (the invented positions map to non-integral indices and are dropped, which is what the centred candidate was already doing) and search again there. Measured on one rotation crystal: C 1 1 2_1 on 68.6 73.0 170.3 90 90 90 becomes P 1 2_1 1 on 50.1 170.3 50.1 90 93.5 90, exactly the deposited setting, with every merge statistic unchanged (R_meas 0.1209, CC1/2 0.9979, d_min 1.238) and ISa 18.27 -> 18.31. Stable across +/-0.5 mm of detector distance. Eight other crystals are bit-identical, and across 112 stored battery reports exactly one adopts a volume-doubling setting. 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.