Add flipper log delay correction

eos/options.py

@@ -499,6 +499,15 @@ class ReflectivityReductionConfig(ArgParsable):
                 },
             )
 
+    flipperMaxDelay: int = field(
+            default=4,
+            metadata={
+                'short': 'fmd',
+                'group': 'data manicure',
+                'help':  'Remove all neutron pulses that are within flipperMaxDelay of a change in spin state',
+                },
+            )
+
 class OutputFomatOption(StrEnum):
     Rqz_ort = "Rqz.ort"
     Rqz_orb = "Rqz.orb"

eos/reduction_reflectivity.py

@@ -185,7 +185,9 @@ class ReflectivityReduction:
                 for pi in pols:
                     plabel = const.polarizationLabels[pi]
                     pol_filter = FilterByLog(f'polarization_config_label=={pi}',
-                                             remove_switchpulse=True) | ApplyMask()
+                                             remove_switchpulse=True,
+                                             pre_switch=self.config.reduction.flipperMaxDelay
+                                             ) | ApplyMask()
                     logging.info(f'    filter {plabel} using polarization_config_label=={pi}')
                     pol_filter(self.dataset)
                     self.dataset.update_header(self.header)