FormatCBFMiniEigerChessID7B2 for the Eiger2 16M detector at CHESS

ID7B2, where the rotation axis is antiparallel to fast.

Fixes dials/dials#2464

src/dxtbx/format/FormatCBFMiniEigerChessID7B2.py

@@ -0,0 +1,39 @@
+"""
+An implementation of the FormatCBFMiniEiger image reader for the Eiger2 16M
+detector at the CHESS ID7B2 beamline, which has an inverted goniometer axis.
+"""
+
+from __future__ import annotations
+
+import sys
+
+from dxtbx.format.FormatCBFMiniEiger import FormatCBFMiniEiger
+
+
+class FormatCBFMiniEigerChessID7B2(FormatCBFMiniEiger):
+ """A class for reading mini CBF format Eiger16M images for S/N E-32-0123
+ installed at CHESS ID7B2, which has an inverted goniometer axis."""
+
+ @staticmethod
+ def understand(image_file):
+ """Check to see if this looks like an Eiger mini CBF format image,
+ i.e. we can make sense of it."""
+
+ header = FormatCBFMiniEiger.get_cbf_header(image_file)
+ for record in header.split("\n"):
+ if "Detector: Dectris EIGER2 Si 16M, S/N E-32-0123" in record:
+ return True
+
+ return False
+
+ def _goniometer(self):
+ """Return a model for a simple single-axis goniometer. This should
+ probably be checked against the image header, though for miniCBF
+ there are limited options for this."""
+
+ return self._goniometer_factory.known_axis((-1, 0, 0))
+
+
+if __name__ == "__main__":
+ for arg in sys.argv[1:]:
+ print(FormatCBFMiniEigerChessID7B2.understand(arg))