FSD geometries

Three FSD geometries which are consistent with current beampipes design following same energies.

fsd/fsd_v23e.geo.info

+FSD geometry v23e created with create_fsdgeo_firstRealistic.C
+
+Position for maximum deflection angle, e.g. E_kin_beam = 5A GeV and 100% magnetic field strength
+
+Number of SMALL  modules per quadrant: 5 x 3
+Number of MEDIUM modules per quadrant: 4 x 3
+Number of LARGE  modules per quadrant: 2 x 2
+FSD thickness: 5 cm 
+FSD front plane center coordinates: (36.378, 0, 1000) cm
+FSD rotation around y axis: 0.0375246 rad
+Hole in the wall has a radii of 10 cm
+
+Parameters of module fsdmodule: 
+Size: 4 cm x 4 cm
+Thickness: 5 cm
+Channel Depth (ratio of thickness): 0.75
+Channel Width: 0.2 cm
+Channel distance from the edge of scintillator: 0.5 cm
+Channel radius at corners: 1 cm
+
+Parameters of module fsdmodule: 
+Size: 8 cm x 8 cm
+Thickness: 5 cm
+Channel Depth (ratio of thickness): 0.75
+Channel Width: 0.2 cm
+Channel distance from the edge of scintillator: 0.5 cm
+Channel radius at corners: 1 cm
+
+Parameters of module fsdmodule: 
+Size: 16 cm x 16 cm
+Thickness: 5 cm
+Channel Depth (ratio of thickness): 0.75
+Channel Width: 0.2 cm
+Channel distance from the edge of scintillator: 0.5 cm
+Channel radius at corners: 1 cm
+
+
+FSD size is 192 cm x 160 cm x 5 cm
+FSD contains 372 modules in total,
+small sized modules: 156
+medium sized modules: 144
+large sized modules: 72
+FSD volume center coordinates: (36.4718, 0, 1002.5) cm

fsd/fsd_v23f.geo.info

+FSD geometry v23f created with create_fsdgeo_firstRealistic.C
+
+Position for NO deflection angle
+
+Number of SMALL  modules per quadrant: 5 x 3
+Number of MEDIUM modules per quadrant: 4 x 3
+Number of LARGE  modules per quadrant: 2 x 2
+FSD thickness: 5 cm 
+FSD front plane center coordinates: (-2.47, 0, 1000) cm
+FSD rotation around y axis: 0 rad
+Hole in the wall has a radii of 10 cm
+
+Parameters of module fsdmodule: 
+Size: 4 cm x 4 cm
+Thickness: 5 cm
+Channel Depth (ratio of thickness): 0.75
+Channel Width: 0.2 cm
+Channel distance from the edge of scintillator: 0.5 cm
+Channel radius at corners: 1 cm
+
+Parameters of module fsdmodule: 
+Size: 8 cm x 8 cm
+Thickness: 5 cm
+Channel Depth (ratio of thickness): 0.75
+Channel Width: 0.2 cm
+Channel distance from the edge of scintillator: 0.5 cm
+Channel radius at corners: 1 cm
+
+Parameters of module fsdmodule: 
+Size: 16 cm x 16 cm
+Thickness: 5 cm
+Channel Depth (ratio of thickness): 0.75
+Channel Width: 0.2 cm
+Channel distance from the edge of scintillator: 0.5 cm
+Channel radius at corners: 1 cm
+
+
+FSD size is 192 cm x 160 cm x 5 cm
+FSD contains 372 modules in total,
+small sized modules: 156
+medium sized modules: 144
+large sized modules: 72
+FSD volume center coordinates: (-2.47, 0, 1002.5) cm

fsd/fsd_v23g.geo.info

+FSD geometry v23g created with create_fsdgeo_firstRealistic.C
+
+Position for Au beam at 3.3A GeV/c and 50% magnetic field strength
+
+Number of SMALL  modules per quadrant: 5 x 3
+Number of MEDIUM modules per quadrant: 4 x 3
+Number of LARGE  modules per quadrant: 2 x 2
+FSD thickness: 5 cm 
+FSD front plane center coordinates: (27.5773, 0, 1000) cm
+FSD rotation around y axis: 0.0290599 rad
+Hole in the wall has a radii of 10 cm
+
+Parameters of module fsdmodule: 
+Size: 4 cm x 4 cm
+Thickness: 5 cm
+Channel Depth (ratio of thickness): 0.75
+Channel Width: 0.2 cm
+Channel distance from the edge of scintillator: 0.5 cm
+Channel radius at corners: 1 cm
+
+Parameters of module fsdmodule: 
+Size: 8 cm x 8 cm
+Thickness: 5 cm
+Channel Depth (ratio of thickness): 0.75
+Channel Width: 0.2 cm
+Channel distance from the edge of scintillator: 0.5 cm
+Channel radius at corners: 1 cm
+
+Parameters of module fsdmodule: 
+Size: 16 cm x 16 cm
+Thickness: 5 cm
+Channel Depth (ratio of thickness): 0.75
+Channel Width: 0.2 cm
+Channel distance from the edge of scintillator: 0.5 cm
+Channel radius at corners: 1 cm
+
+
+FSD size is 192 cm x 160 cm x 5 cm
+FSD contains 372 modules in total,
+small sized modules: 156
+medium sized modules: 144
+large sized modules: 72
+FSD volume center coordinates: (27.6499, 0, 1002.5) cm

fsd/fsd_v23h.geo.info

+FSD geometry v23h created with create_fsdgeo_firstRealistic.C
+
+Position for Au beam at 12A GeV/c and 100% magnetic field strength
+
+Number of SMALL  modules per quadrant: 5 x 3
+Number of MEDIUM modules per quadrant: 4 x 3
+Number of LARGE  modules per quadrant: 2 x 2
+FSD thickness: 5 cm 
+FSD front plane center coordinates: (11.3101, 0, 1000) cm
+FSD rotation around y axis: 0.0133518 rad
+Hole in the wall has a radii of 10 cm
+
+Parameters of module fsdmodule: 
+Size: 4 cm x 4 cm
+Thickness: 5 cm
+Channel Depth (ratio of thickness): 0.75
+Channel Width: 0.2 cm
+Channel distance from the edge of scintillator: 0.5 cm
+Channel radius at corners: 1 cm
+
+Parameters of module fsdmodule: 
+Size: 8 cm x 8 cm
+Thickness: 5 cm
+Channel Depth (ratio of thickness): 0.75
+Channel Width: 0.2 cm
+Channel distance from the edge of scintillator: 0.5 cm
+Channel radius at corners: 1 cm
+
+Parameters of module fsdmodule: 
+Size: 16 cm x 16 cm
+Thickness: 5 cm
+Channel Depth (ratio of thickness): 0.75
+Channel Width: 0.2 cm
+Channel distance from the edge of scintillator: 0.5 cm
+Channel radius at corners: 1 cm
+
+
+FSD size is 192 cm x 160 cm x 5 cm
+FSD contains 372 modules in total,
+small sized modules: 156
+medium sized modules: 144
+large sized modules: 72
+FSD volume center coordinates: (11.3435, 0, 1002.5) cm

media.geo

@@ -110,6 +110,17 @@ PsdPolyethylene    3  12.01   1.01   10.81  6.  1.  5.  1.12  0.825  0.14  0.035
                    0  1  20.  0.001
                    0
 
+// -----  Media for the FSD   ------------------------------------------------
+// --- Plastic (Scintillator), active, 92% carbon, 8% hydrogen
+FsdScint         2  12.011  1.008  6.   1.  1.032  0.9225687  0.0774313
+                   1  0  20.  0.001
+                   0
+
+// --- Plastic (Fibres), passive, same as for scintillator
+FsdFibre         2  12.011  1.008  6.   1.  1.032  0.9225687  0.0774313
+                   0  0  20.  0.001
+                   0
+
 // -------------- BEAM PIPE ----------------------------------
 
 BP_vacuum   1  1.e-16  1.e-16  1.e-16