Feat: Fixed per-beamline raster parameters in automation

The raster in the automated measurement sequence no longer reads
exposure/transmission/resolution from the spreadsheet. It uses fixed
per-beamline values from the dispatch:
- X06DA: 0.04 s, 100% transmission, 150 mm
- X10SA: 0.02 s, 10% transmission, 200 mm

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/aare/beamline_dispatch/default/beamline_dispatch.py

@@ -58,3 +58,8 @@ class DefaultDispatch(BeamlineDispatch, ABC):
     @property
     def default_rotation_parameters(self) -> dict[str, Any]:
         return {"exp_time_s": 0.04, "dtz": 110, "incr_omega_deg": 0.2}
+
+    @property
+    def default_auto_raster_parameters(self) -> dict[str, Any]:
+        """Fixed raster parameters used by the automated measurement sequence."""
+        return {"exp_time_s": 0.04, "transmission": 1.0, "dtz": 200}

src/aare/beamline_dispatch/protocols.py

@@ -67,3 +67,6 @@ class BeamlineDispatch(ABC):
     @property
     @abstractmethod
     def default_rotation_parameters(self) -> dict[str, Any]: ...
+    @property
+    @abstractmethod
+    def default_auto_raster_parameters(self) -> dict[str, Any]: ...

src/aare/beamline_dispatch/x06da/beamline_dispatch.py

@@ -124,3 +124,7 @@ class X06daDispatch(DefaultDispatch):
     def default_rotation_parameters(self) -> dict[str, Any]:
         default = super().default_rotation_parameters
         return default | {"transmission": 1.0}
+
+    @property
+    def default_auto_raster_parameters(self) -> dict[str, Any]:
+        return {"exp_time_s": 0.04, "transmission": 1.0, "dtz": 150}

src/aare/beamline_dispatch/x10sa/beamline_dispatch.py

@@ -125,3 +125,7 @@ class X10saDispatch(DefaultDispatch):
     def default_rotation_parameters(self) -> dict[str, Any]:
         default = super().default_rotation_parameters
         return default | {"transmission": 0.1}
+
+    @property
+    def default_auto_raster_parameters(self) -> dict[str, Any]:
+        return {"exp_time_s": 0.02, "transmission": 0.1, "dtz": 200}

src/aare/daq/daq.py

@@ -2346,55 +2346,11 @@ class AareDAQ:
         )
 
     def get_auto_raster_params(self) -> SimpleScanParameters:
-        default_params = self.get_beamline_default_raster_params()
-        if self.status.sample is None:
-            return default_params
+        """Raster parameters for the automated measurement sequence.
 
-        aaredb_params = (
-            self.status.sample.aaredb_params
-            if hasattr(self.status.sample, "aaredb_params")
-            else None
-        )
-
-        if aaredb_params is None:
-            return default_params
-
-        params = default_params
-
-        # Exposure
-        exp = getattr(aaredb_params, "exposure", None)
-        if exp is not None:
-            params.exp_time_s = exp
-        else:
-            params.exp_time_s = 0.04  # Default
-
-        # Transmission
-        trans = getattr(aaredb_params, "transmission", None)
-        if trans is not None:
-            logger.debug(f"transmission: {trans}")
-            params.transmission = trans / 100.0 if trans > 1.0 else trans
-        else:
-            params.transmission = 1.0  # Default
-
-        # Resolution and DTZ
-        res = getattr(aaredb_params, "targetresolution", None)
-        if res is not None:
-            logger.debug(f"resolution: {res}")
-            try:
-                params.dtz = self.diffraction_geometry.calc_dtz_mm(res)
-                logger.debug(f"dtz: {params.dtz}")
-            except Exception:
-                logger.exception(f"Failed to calculate dtz for resolution {res}")
-
-            # Adjust exposure time based on resolution
-            if res <= 1.5:
-                params.exp_time_s = 0.02
-            elif 1.5 < res <= 3.0:
-                params.exp_time_s = 0.04
-            else:
-                params.exp_time_s = 0.08
-
-        return params
+        Fixed per beamline; spreadsheet parameters only apply to data collection.
+        """
+        return SimpleScanParameters(**self._dispatch.default_auto_raster_parameters)
 
     def get_collection_params(self, prefer_smart: bool = False) -> tuple[SimpleScanParameters, str]:
         spreadsheet_params, _file_prefix = self.spreadsheet_params()