diff --git a/debye_bec/file_writer/debye_nexus_structure.py b/debye_bec/file_writer/debye_nexus_structure.py
index 351fab5..d1f1ce4 100644
--- a/debye_bec/file_writer/debye_nexus_structure.py
+++ b/debye_bec/file_writer/debye_nexus_structure.py
@@ -10,17 +10,88 @@ class DebyeNexusStructure(DefaultFormat):
         entry.attrs["NX_class"] = "NXentry"
         instrument = entry.create_group(name="instrument")
         instrument.attrs["NX_class"] = "NXinstrument"
-        monochromator = instrument.create_group(name="monochromator")
-        # monochromator.attrs["NX_class"] = "NXmonochromator" -> to be checked
-        crystal = monochromator.create_group(name="crystal")
 
         ###################
         ## mo1_bragg specific information
         ###################
 
         # Logic if device exist
-        if "mo_trx" in self.device_manager.devices:
+        if "mo1_bragg" in self.device_manager.devices:
+            
+            monochromator = instrument.create_group(name="monochromator")
+            monochromator.attrs["NX_class"] = "NXmonochromator"
+            crystal = monochromator.create_group(name="crystal")
+            crystal.attrs["NX_class"] = "NXcrystal"
+
+            # Create a dataset
+            chemical_formular = crystal.create_dataset(name="chemical_formular", data='Si')
+            chemical_formular.attrs["NX_class"] = "NX_CHAR"
+
             # Create a softlink
-            chemical_formular = crystal.create_soft_link(name="chemical_formular", target="/entry/collection/devices/mo_trx/mo_trx")
-            chemical_formular.attrs["NX_class"] = "NXdata"
-            
\ No newline at end of file
+            d_spacing = crystal.create_soft_link(name="d_spacing", target="/entry/collection/devices/mo1_bragg/mo1_bragg_crystal_current_d_spacing/value")
+            d_spacing.attrs["NX_class"] = "NX_FLOAT"
+
+            offset = crystal.create_soft_link(name="offset", target="/entry/collection/devices/mo1_bragg/mo1_bragg_crystal_current_offset/value")
+            offset.attrs["NX_class"] = "NX_FLOAT"
+
+            reflection = crystal.create_soft_link(name="reflection", target="/entry/collection/devices/mo1_bragg/mo1_bragg_crystal_current_xtal_string/value")
+            reflection.attrs["NX_class"] = "NX_CHAR"
+        
+
+        ##################
+        ## cm mirror specific information
+        ###################    
+            
+        collimating_mirror = instrument.create_group(name="collimating_mirror")
+        collimating_mirror.attrs["NX_class"] = "NXmirror"
+
+        cm_substrate_material = collimating_mirror.create_dataset(name="substrate_material", data='Si')
+        cm_substrate_material.attrs["NX_class"] = "NX_CHAR"
+
+        cm_bending_radius = collimating_mirror.create_soft_link(name="sagittal radius", target="/entry/collection/devices/cm_bnd_radius/cm_bnd_radius/value")
+        cm_bending_radius.attrs["NX_class"] = "NX_FLOAT"
+        cm_bending_radius.attrs["units"] = 'km'
+
+        cm_incidence_angle = collimating_mirror.create_soft_link(name="incidence angle", target="/entry/collection/devices/cm_rotx/cm_rotx/value") 
+        cm_incidence_angle.attrs["NX_class"] = "NX_FLOAT"
+
+        cm_yaw_angle = collimating_mirror.create_soft_link(name="incident angle", target="/entry/collection/devices/cm_roty/cm_roty/value") 
+        cm_yaw_angle.attrs["NX_class"] = "NX_FLOAT"        
+
+        ##################
+        ## fm mirror specific information
+        ###################    
+            
+        focusing_mirror = instrument.create_group(name="focusing_mirror")
+        focusing_mirror.attrs["NX_class"] = "NXmirror"
+
+        fm_substrate_material = focusing_mirror.create_dataset(name="substrate_material", data='Si')
+        fm_substrate_material.attrs["NX_class"] = "NX_CHAR"
+
+        fm_bending_radius = focusing_mirror.create_soft_link(name="sagittal radius", target="/entry/collection/devices/fm_bnd_radius/fm_bnd_radius/value")
+        fm_bending_radius.attrs["NX_class"] = "NX_FLOAT"
+
+        fm_incidence_angle = focusing_mirror.create_soft_link(name="incidence angle", target="/entry/collection/devices/fm_incidence_angle/fm_incidence_angle/value") 
+        fm_incidence_angle.attrs["NX_class"] = "NX_FLOAT"
+
+        fm_yaw_angle = focusing_mirror.create_soft_link(name="yaw angle", target="/entry/collection/devices/fm_roty/fm_roty/value") 
+        fm_yaw_angle.attrs["NX_class"] = "NX_FLOAT"
+
+        fm_roll_angle = focusing_mirror.create_soft_link(name="roll angle", target="/entry/collection/devices/fm_rotz/fm_rotz/value") 
+        fm_roll_angle.attrs["NX_class"] = "NX_FLOAT"
+
+        ##################
+        ## source specific information
+        ###################            
+
+        source = instrument.create_group(name="source")
+        source.attrs["NX_class"] = "NXsource"
+
+        beamline_name = source.create_dataset(name="beamline_name", data='Debye')
+        beamline_name.attrs["NX_class"] = "NX_CHAR"
+
+        facility_name = source.create_dataset(name="facility_name", data='Swiss Light Source')
+        facility_name.attrs["NX_class"] = "NX_CHAR"
+
+        probe = source.create_dataset(name="probe", data='X-ray')
+        probe.attrs["NX_class"] = "NX_CHAR"
\ No newline at end of file