leonarski_fandClaude Opus 5.5
87560311bc
A pedestal-subtracted JUNGFRAU background is mostly empty pixels; the variance per unit mean leaves out the zeros and read 6.7 keV per photon on a 12 keV run in keV, 2.4 on a 4.6 keV one, so such files needed --gain. MeasureGain now also histograms the sampled pixel values and takes the gain from the single-photon peak (background_gain::PhotonPeak): the highest bin past the zero peak's descent, standing 5 sigma above the valley before it, narrow (below half height a quarter of its value away), and repeated by a two-photon peak near twice its value. Where there is no such pair the variance per unit mean decides as before. Float frames are read for the measurement at a sixteenth of their unit, so a photon of a few keV is resolved rather than rounded to whole keV. Measured: float32 keV JUNGFRAU files 11.96 (photon energy 12.04 keV) and 4.53 (4.57 keV); the int16 photon copies show no peak past the first bin and keep the 0.55 variance answer, i.e. stay in photons; the SACLA MPCCD and PAL Rayonix files show humps, not photon peaks, and measure as before. A gain the file states or --gain gives still wins. Rotation is untouched (the pre-scan's CCD gain uses only the variance estimator). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015CeEGgpKdfkCTJb3YNMJcu
Jungfraujoch
Application to receive and analyse data from the PSI JUNGFRAU and EIGER detectors, together with
rugnux, its program for processing stored diffraction data - rotation and serial, macromolecular
and small-molecule - from images to merged reflections.
All documentation is now placed in docs/ subdirectory and for the current version hosted on Jungfraujoch Read The Docs page.