diff --git a/docs/examples/amor.ipynb b/docs/examples/amor.ipynb
index 07e123b..c171fea 100644
--- a/docs/examples/amor.ipynb
+++ b/docs/examples/amor.ipynb
@@ -8,7 +8,7 @@
    "source": [
     "import scipp as sc\n",
     "import sciline\n",
-    "from essreflectometry.amor import providers as amor\n",
+    "from essreflectometry.amor import providers as amor, default_parameters\n",
     "from essreflectometry.reflectometry import providers as reflectometry\n",
     "from essreflectometry.reflectometry.types import (\n",
     "    Sample, Reference, Sample, SampleRotation, Filename,\n",
@@ -18,6 +18,7 @@
     "pipeline = sciline.Pipeline(\n",
     "    amor + reflectometry,\n",
     "    params={\n",
+    "        **default_parameters,\n",
     "        QBins: sc.geomspace(dim='Q', start=0.008, stop=0.075, num=200, unit='1/angstrom'),\n",
     "        SampleRotation[Sample]: sc.scalar(0.7989, unit='deg'),\n",
     "        Filename[Sample]: \"sample.nxs\",\n",
diff --git a/src/essreflectometry/amor/__init__.py b/src/essreflectometry/amor/__init__.py
index c8bd3e1..5d31332 100644
--- a/src/essreflectometry/amor/__init__.py
+++ b/src/essreflectometry/amor/__init__.py
@@ -3,9 +3,13 @@
 # flake8: noqa: F401
 from itertools import chain
 
-from . import calibrations, conversions, load, normalize, resolution, tools
-from .beamline import instrument_view_components
+import scipp as sc
+
+from . import beamline, calibrations, conversions, load, normalize, resolution, tools
+
+# from .beamline import instrument_view_components
 from .instrument_view import instrument_view
+from .types import *
 
 providers = list(
     chain(
@@ -17,3 +21,9 @@
         beamline.providers,
     )
 )
+
+default_parameters = {
+    Supermirror[MValue]: sc.scalar(5, unit=sc.units.dimensionless),
+    Supermirror[CriticalEdge]: 0.022 * sc.Unit('1/angstrom'),
+    Supermirror[Alpha]: sc.scalar(0.25 / 0.088, unit=sc.units.angstrom),
+}
diff --git a/src/essreflectometry/amor/calibrations.py b/src/essreflectometry/amor/calibrations.py
index acbb57e..57c71ad 100644
--- a/src/essreflectometry/amor/calibrations.py
+++ b/src/essreflectometry/amor/calibrations.py
@@ -4,15 +4,15 @@
 
 # from ..reflectometry import orso
 from ..reflectometry.types import CalibratedReference, Histogrammed, Reference
+from .types import Alpha, CriticalEdge, MValue, Supermirror
 
 
 def supermirror_calibration(
     data_array: Histogrammed[Reference],
+    m_value: Supermirror[MValue],
+    critical_edge: Supermirror[CriticalEdge],
+    alpha: Supermirror[Alpha],
 ) -> Histogrammed[CalibratedReference]:
-    # TODO
-    m_value: sc.Variable = None
-    critical_edge: sc.Variable = None
-    alpha: sc.Variable = None
     """
     Calibrate supermirror measurements
 
@@ -21,23 +21,16 @@ def supermirror_calibration(
     data_array:
         Data array to get q-bins/values from.
     m_value:
-        m-value for the supermirror. Defaults to 5.
+        m-value for the supermirror.
     critical_edge:
-        Supermirror critical edge. Defaults to 0.022 1/angstrom.
+        Supermirror critical edge.
     alpha:
-        Supermirror alpha value. Defaults to 0.25 / 0.088 angstrom.
-
+        Supermirror alpha value.
     Returns
     -------
     :
         Calibrated supermirror measurement.
     """
-    if m_value is None:
-        m_value = sc.scalar(5, unit=sc.units.dimensionless)
-    if critical_edge is None:
-        critical_edge = 0.022 * sc.Unit('1/angstrom')
-    if alpha is None:
-        alpha = sc.scalar(0.25 / 0.088, unit=sc.units.angstrom)
     calibration = calibration_factor(data_array, m_value, critical_edge, alpha)
     data_array_cal = data_array * calibration
     # TODO
@@ -52,9 +45,9 @@ def supermirror_calibration(
 
 def calibration_factor(
     data_array: sc.DataArray,
-    m_value: sc.Variable = None,
-    critical_edge: sc.Variable = None,
-    alpha: sc.Variable = None,
+    m_value: sc.Variable,
+    critical_edge: sc.Variable,
+    alpha: sc.Variable,
 ) -> sc.Variable:
     """
     Return the calibration factor for the supermirror.
@@ -64,23 +57,17 @@ def calibration_factor(
     data_array:
         Data array to get q-bins/values from.
     m_value:
-        m-value for the supermirror. Defaults to 5.
+        m-value for the supermirror.
     critical_edge:
-        Supermirror critical edge. Defaults to 0.022 1/angstrom.
+        Supermirror critical edge.
     alpha:
-        Supermirror alpha value. Defaults to 0.25 / 0.088 angstrom.
+        Supermirror alpha value.
 
     Returns
     -------
     :
         Calibration factor at the midpoint of each Q-bin.
     """
-    if m_value is None:
-        m_value = sc.scalar(5, unit=sc.units.dimensionless)
-    if critical_edge is None:
-        critical_edge = 0.022 * sc.Unit('1/angstrom')
-    if alpha is None:
-        alpha = sc.scalar(0.25 / 0.088, unit=sc.units.angstrom)
     q = data_array.coords['Q']
     if data_array.coords.is_edges('Q'):
         q = sc.midpoints(q)
diff --git a/src/essreflectometry/amor/types.py b/src/essreflectometry/amor/types.py
new file mode 100644
index 0000000..f4ca226
--- /dev/null
+++ b/src/essreflectometry/amor/types.py
@@ -0,0 +1,13 @@
+from typing import NewType, TypeVar
+
+import sciline
+import scipp as sc
+
+MValue = NewType('MValue', str)
+CriticalEdge = NewType('CriticalEdge', str)
+Alpha = NewType('Alpha', str)
+SupermirrorParameter = TypeVar('SupermirrorParameter', MValue, CriticalEdge, Alpha)
+
+
+class Supermirror(sciline.Scope[SupermirrorParameter, sc.Variable], sc.Variable):
+    """Supermirror parameter scope"""