<define>
<comment>Although not explicit in the design study, the eRHIC crossing angle is not symmetric.</comment>
<constant name="CrossingAngle" value="0.025"/>
<constant name="ionCrossingAngle" value="0.0166667"/>
<constant name="electronCrossingAngle" value="0.00833333"/>
<constant name="CrossingSlope" value="0.0166682"/>
<constant name="Pi" value="3.14159265359"/>
<constant name="world_side" value="30*m"/>
<constant name="world_x" value="world_side"/>
<constant name="world_y" value="world_side"/>
<constant name="world_z" value="100*m"/>
<constant name="mil" value="0.0254*mm"/>
<comment>
------------
Detector IDs
------------
Note about ACTS tracking geometry construction
----------------------------------------------
The tracking surfaces need to be structured in a barrel + endcapP + endcapN where
endcapP/endcapN are the endcaps at positive/negative z values.
See https://acts.readthedocs.io/en/latest/plugins/dd4hep.html for more details.
The tracking geometry needs to beconstructed from cylinders from the inside out. For this reason
each layer needs its own subsystem assembly. This increases the number of top level system IDs.
For example the silicon tracker needs 3 IDs for each area (endcap+barrel+endcap) and a subassembly for each
layer. Therefore it needs a minimum of 20 IDs. Therefore we will allocate blocks of ~25 for each major subsystem.
Note, future improvements will likely include a more sophisticated ACTS-dd4hep plugin,
eliminating the need for so many system IDs at construction time.
This barrel/endcap structure needs IDs to be in increasing order going outward.
The space of IDs for the subassemblies starts at (Subassembly_ID*10+101).
The unused IDs below are saved for future use.
</comment>
<comment>
===================
(1-9) Reserved IDs
===================
Unused IDs: 1-9
====================================
(10-24) Interaction region beamline
====================================
Beampipe ID : 10
Unused IDs: 11-24
</comment>
<constant name="BeamPipe_ID" value="10"/>
<comment>
===============================
(25-49) Silicon Vertex Tracker
===============================
SiVertex subsystem ID: 25
Layer 1 subassembly ID: 26
Layer 2 subassembly ID: 27
Layer 3 subassembly ID: 28
Layer 4 subassembly ID: 29
Layer 5 subassembly ID: 30
</comment>
<constant name="SiVertexSubAssembly_ID" value="25"/>
<comment>
Unused values reserved for vertex:
constant name="SiVertexSubAssemblyLayer1_ID" value="121"
constant name="SiVertexSubAssemblyLayer2_ID" value="122"
constant name="SiVertexSubAssemblyLayer3_ID" value="123"
constant name="SiVertexSubAssemblyLayer4_ID" value="124"
constant name="SiVertexSubAssemblyLayer5_ID" value="125"
</comment>
<comment>
===============================
(50-74) Silicon Tracker System
===============================
SiTracker subsystem ID: 50
Layer 1 subassembly ID: 51
Layer 2 subassembly ID: 52
Layer 3 subassembly ID: 53
Layer 4 subassembly ID: 54
Layer 5 subassembly ID: 55
(56-70) etc...
Unused IDs: 71-74
</comment>
<constant name="SiTrackerSubAssembly_ID" value="50"/>
<constant name="SiTrackerSubAssemblyLayer1_ID" value="51"/>
<constant name="SiTrackerSubAssemblyLayer2_ID" value="52"/>
<constant name="SiTrackerSubAssemblyLayer3_ID" value="53"/>
<constant name="SiTrackerSubAssemblyLayer4_ID" value="54"/>
<constant name="SiTrackerSubAssemblyLayer5_ID" value="55"/>
<constant name="SiTrackerBarrel_Layer1_ID" value="56"/>
<constant name="SiTrackerEndcapP_Layer1_ID" value="57"/>
<constant name="SiTrackerEndcapN_Layer1_ID" value="58"/>
<constant name="SiTrackerBarrel_Layer2_ID" value="59"/>
<constant name="SiTrackerEndcapP_Layer2_ID" value="60"/>
<constant name="SiTrackerEndcapN_Layer2_ID" value="61"/>
<constant name="SiTrackerBarrel_Layer3_ID" value="62"/>
<constant name="SiTrackerEndcapP_Layer3_ID" value="63"/>
<constant name="SiTrackerEndcapN_Layer3_ID" value="64"/>
<constant name="SiTrackerBarrel_Layer4_ID" value="65"/>
<constant name="SiTrackerEndcapP_Layer4_ID" value="66"/>
<constant name="SiTrackerEndcapN_Layer4_ID" value="67"/>
<constant name="SiTrackerBarrel_Layer5_ID" value="68"/>
<constant name="SiTrackerEndcapP_Layer5_ID" value="69"/>
<constant name="SiTrackerEndcapN_Layer5_ID" value="70"/>
<constant name="cb_CTD_Si_ID" value="74"/>
<comment>
===================
(75-99 Reserved IDs
===================
Unused IDs: 75-99
TBD
</comment>
<comment>
=====================================
(100-109) Electromagnetic Calorimeter
=====================================
ECal subsystem ID: 100
Barrel subassembly ID: 101
EndcapP subassembly ID: 102
EndcapN subassembly ID: 103
Crystal subassembly ID: 104
Unused IDs: 105-109
</comment>
<constant name="ECalSubAssembly_ID" value="100"/>
<constant name="ECalBarrel_ID" value="101"/>
<constant name="ECalEndcapP_ID" value="102"/>
<constant name="ECalEndcapN_ID" value="103"/>
<constant name="CrystalEndcap_ID" value="104"/>
<comment>
=====================================
(110-119Hadronic Calorimeter
=====================================
HCal subsystem ID: 110
Barrel subassembly ID: 111
EndcapP subassembly ID: 112
EndcapN subassembly ID: 113
Unused IDs: 114-119
</comment>
<constant name="HCalSubAssembly_ID" value="110"/>
<constant name="HCalBarrel_ID" value="111"/>
<constant name="HCalEndcapP_ID" value="112"/>
<constant name="HCalEndcapN_ID" value="113"/>
<comment>
=====================================
(120-129) (near) Forward reserved
=====================================
Forwardtracking ID: 120
Forward RICH ID: 121
Unused IDs: 123-129
</comment>
<constant name="ForwardTracking_ID" value="120"/>
<constant name="ForwardRICH_ID" value="121"/>
<comment>
=====================================
(130-139) Backward reserved
=====================================
Modular RICH ID: 130
Unused IDs: 131-139
</comment>
<constant name="ce_MRICH_ID" value="130"/>
<comment>
=====================================
(140-149) Central Magnet
=====================================
Solenoid ID: 140
Solenoid support ID: 141
Solenoid Yoke ID: 142
Unused IDs: 143-149
</comment>
<constant name="Solenoid_ID" value="140"/>
<constant name="SolenoidSupport_ID" value="141"/>
<constant name="SolenoidYoke_ID" value="142"/>
<comment>
=====================================
(150-169) Far Forward Detectors
=====================================
Forward Roman Pot ID: 150
Zero Degree Cal. ID: 160
</comment>
<constant name="ForwardRomanPot_ID" value="150"/>
<constant name="ffi_ZDC_ID" value="160"/>
<comment>
=====================================
(170-189) Forward Beamline Magnets
=====================================
</comment>
<comment>
=====================================
(190-199) Backward Beamline Magnets
=====================================
</comment>
<comment>
--------------------------
Solenoid Magnet Parameters
--------------------------
</comment>
<comment>
These cb_ parameters don't make sense
</comment>
<constant name="cb_Solenoid_rmin" value="0.0 * cm"/> <comment> Central Barrel Solenoid Inner diameter </comment>
<constant name="cb_Solenoid_rmax" value="137.0 * cm"/> <comment> Central Barrel Solenoid Outer diameter </comment>
<constant name="cb_Solenoid_z" value="400.0 * cm"/> <comment> Central Barrel Solenoid Size in Z direction </comment>
<constant name="cb_Solenoid_shift" value="0.0 * cm"/>
<constant name="Solenoid_thickness" value="400*mm"/>
<constant name="Solenoid_rmin" value="2000.0*mm"/>
<constant name="Solenoid_rmax" value="Solenoid_rmin + Solenoid_thickness"/>
<constant name="SolenoidLength" value="4050.0*mm"/>
<constant name="SolenoidBarrelCryostatThickness" value=" 1.0 * cm"/>
<constant name="SolenoidBarrelGapThickness" value=" 3.3 * cm"/>
<constant name="SolenoidBarrelAlConductorThickness" value="12.0 * cm"/>
<constant name="SolenoidBarrelQuenchbackThickness" value=" 1.5 * cm"/>
<constant name="SolenoidBarrelOuterGapThickness" value=" 5.6 * cm"/>
<constant name="SolenoidBarrelOuterCryostatThickness" value=" 1.2 * cm"/>
<constant name="SolenoidEndPlateGapThickness" value=" 5.7 * cm"/>
<constant name="SolenoidEndPlateCryostatThickness" value=" 1.5 * cm"/>
<constant name="SolenoidBarrel_rmin" value="Solenoid_rmin"/>
<constant name="SolenoidBarrelLenth" value="SolenoidLength"/>
<constant name="SolenoidBarrel_zmax" value="SolenoidBarrelLenth/2.0"/>
<constant name="SolenoidCoilConductor_rmin"
value="SolenoidBarrel_rmin + SolenoidBarrelCryostatThickness + SolenoidBarrelGapThickness"/>
<constant name="SolenoidCoilConductor_rmax"
value="SolenoidCoilConductor_rmin + SolenoidBarrelAlConductorThickness + SolenoidBarrelQuenchbackThickness"/>
<constant name="SolenoidBarrel_rmax"
value="SolenoidCoilConductor_rmax + SolenoidBarrelOuterGapThickness + SolenoidBarrelOuterCryostatThickness"/>
<constant name="SolenoidCoil_zmax"
value="SolenoidBarrel_zmax - SolenoidEndPlateCryostatThickness - SolenoidEndPlateGapThickness"/>
<constant name="SolenoidalFieldRadius"
value="SolenoidCoilConductor_rmin + SolenoidBarrelAlConductorThickness / 2.0"/>
<constant name="SolenoidCoilLength" value="SolenoidCoil_zmax*2.0"/>
<constant name="SolenoidThickness" value="Solenoid_rmax - Solenoid_rmin"/>
<constant name="SolenoidYokeEndcapP_rmin" value="800*mm"/>
<constant name="SolenoidYokeEndcapN_rmin" value="800*mm"/>
<constant name="SolenoidYokeEndcapThickness" value="0.2 * m"/>
<constant name="SolenoidYokeEndcap_zmin" value="SolenoidBarrel_zmax"/>
<constant name="SolenoidYokeEndcap_zmax" value="SolenoidYokeEndcap_zmin + SolenoidYokeEndcapThickness"/>
<constant name="SolenoidYokeChamferAngle" value="0.2"/>
<comment>
============================
Tracking Parameters
============================
</comment>
<constant name="tracker_region_rmax" value="Solenoid_rmax/2.0"/>
<constant name="tracker_region_zmax" value="SolenoidLength/2.0"/>
<comment>
-------------------------
Vertex Tracker Parameters
-------------------------
</comment>
<constant name="VertexTrackerInnerRadius" value="30.0*mm"/>
<constant name="VertexTrackerOuterRadius" value="Solenoid_rmin/2.0"/>
<constant name="VertexTrackerOuterBarrelLength" value="300.0*mm"/>
<comment>
--------------------------
Silicon Tracker Parameters
--------------------------
</comment>
<constant name="SiliconTrackerInnerRadius" value="95.0*mm"/>
<constant name="SiliconTrackerInnerBarrelLength" value="400.0*mm"/>
<constant name="SiliconTrackerOuterRadius" value="Solenoid_rmax/2.0"/>
<constant name="SiliconTrackerOuterBarrelLength" value="SolenoidLength/2.0"/>
<comment>
-------------------------------
Central Barrel Tracker - Global
-------------------------------
</comment>
<constant name="cb_CTD_rmin" value="21.0 * cm"/>
<constant name="cb_CTD_rmax" value="80.0 * cm"/>
<constant name="cb_CTD_zmax" value="200.0 * cm"/>
<comment> Original Global parameter </comment>
<!--
<constant name="cb_CTD_zmax" value="120.0 * cm"/>
-->
<constant name="cb_CTD_length" value="SolenoidLength - cb_CTD_zmax"/>
<comment> After fix cb_Solenoid parameters </comment>
<!--
<constant name="cb_CTD_length" value="cb_Solenoid_z - cb_CTD_zmax"/>
-->
<comment> Si layer opiton </comment>
<constant name="cb_CTD_Si_gap" value="5.0 * cm"/>
<constant name="cb_CTD_Si_layer" value="15"/>
<comment>
------------
Calorimeters
------------
</comment>
<constant name="EcalBarrel_rmin" value="SiliconTrackerOuterRadius + 3.0 * cm"/>
<constant name="HcalBarrel_rmax" value="Solenoid_rmin - 5.0 *cm "/>
<constant name="AvailTotalBarrelCalorimetryThickness" value="HcalBarrel_rmax - EcalBarrel_rmin"/>
<constant name="CalBarrelDivider" value="0.5"/> <comment> Ecal and Hcal have the same thickness </comment>
<constant name="EcalBarrelAvailTotalThickness" value="AvailTotalBarrelCalorimetryThickness * CalBarrelDivider"/>
<constant name="HcalBarrelAvailTotalThickness" value="AvailTotalBarrelCalorimetryThickness * (1.0 - CalBarrelDivider)"/>
<constant name="EcalBarrelLength" value="SiliconTrackerOuterBarrelLength+50.0*cm"/>
<constant name="EcalEndcap_zmin" value="EcalBarrelLength/2.0"/>
<constant name="AvailTotalEndcapCalorimetryThickness" value="(SolenoidYokeEndcap_zmin - 10.0 * mm) - (EcalEndcap_zmin + 10.0 * mm)"/>
<constant name="CalEndcapDivider" value="0.5"/> <comment> Ecal and Hcal have the same thickness </comment>
<constant name="EcalEndcapAvailTotalThickness" value="AvailTotalEndcapCalorimetryThickness * CalEndcapDivider"/>
<constant name="HcalEndcapAvailTotalThickness" value="AvailTotalEndcapCalorimetryThickness * (1.0 - CalEndcapDivider)"/>
<comment> These need to be set in sync with the forward and backward detectors </comment>
<constant name="EcalEndcapP_rmin" value="250.0*mm"/>
<constant name="EcalEndcapN_rmin" value="350.0*mm"/>
<constant name="HcalEndcapP_rmin" value="250.0 * mm"/>
<constant name="HcalEndcapN_rmin" value="350.0 * mm"/>
<comment>
-------------------------
EM Calorimeter Parameters
-------------------------
</comment>
<constant name="CaloSides" value="12"/>
<comment>Material Thickness</comment>
<constant name="EcalSiliconThickness" value="9.00 * mm"/>
<constant name="EcalCopperThickness" value="0.05 * mm"/>
<constant name="EcalKaptonThickness" value="0.30 * mm"/>
<constant name="EcalAir1Thickness" value="0.33 * mm"/>
<constant name="EcalAir2Thickness" value="0.25 * mm"/>
<constant name="EcalThinTungstenThickness" value="2.50 * mm"/>
<constant name="EcalThickTungstenThickness" value="5.00 * mm"/>
<comment> Layer Thickness </comment>
<constant name="EcalFirstLayerThickness"
value="EcalSiliconThickness + EcalCopperThickness + EcalKaptonThickness + EcalAir1Thickness"/>
<constant name="EcalThinOneLayerThickness"
value="EcalThinTungstenThickness + EcalAir2Thickness + EcalSiliconThickness + EcalCopperThickness + EcalKaptonThickness + EcalAir1Thickness"/>
<constant name="EcalThickOneLayerThickness"
value="EcalThickTungstenThickness + EcalAir2Thickness + EcalSiliconThickness + EcalCopperThickness + EcalKaptonThickness + EcalAir1Thickness"/>
<comment> EM Barrel N Layer; same number of layers for EcalThin and EcalThick</comment>
<constant name="EcalBarrelLayers"
value="floor((EcalBarrelAvailTotalThickness - EcalFirstLayerThickness) / (EcalThinOneLayerThickness + EcalThickOneLayerThickness))"/>
<constant name="EcalBarrelThinLayers" value="EcalBarrelLayers"/>
<constant name="EcalBarrelThickLayers" value="EcalBarrelLayers"/>
<comment> EM Barrel Thickness </comment>
<constant name="EcalBarrelThickness"
value="EcalFirstLayerThickness + (EcalBarrelThinLayers * EcalThinOneLayerThickness) + (EcalBarrelThickLayers * EcalThickOneLayerThickness)"/>
<constant name="EcalBarrel_rmax" value="EcalBarrel_rmin + EcalBarrelThickness"/>
<comment> EM Endcap N Layer; same number of layers for EcalThin and EcalThick </comment>
<constant name="EcalEndcapLayers"
value="floor((EcalEndcapAvailTotalThickness - EcalFirstLayerThickness) / (EcalThinOneLayerThickness + EcalThickOneLayerThickness))"/>
<constant name="EcalEndcapThinLayers" value="EcalEndcapLayers"/>
<constant name="EcalEndcapThickLayers" value="EcalEndcapLayers"/>
<comment> EM Endcap Thickness </comment>
<constant name="EcalEndcapThickness"
value="EcalFirstLayerThickness + (EcalEndcapThinLayers * EcalThinOneLayerThickness) + (EcalEndcapThickLayers * EcalThickOneLayerThickness)"/>
<comment>
-------------------------------
Hadronic Calorimeter Parameters
-------------------------------
</comment>
<constant name="HcalBarrel_rmin" value="EcalBarrel_rmax+10.0*mm"/>
<constant name="HcalBarrelAvailThickness" value="HcalBarrel_rmax - HcalBarrel_rmin"/>
<constant name="HcalBarrelLength" value="EcalBarrelLength+2.0*EcalEndcapThickness + 10.0*mm "/>
<constant name="HcalEndcap_zmin" value="HcalBarrelLength/2.0"/>
<constant name="HcalEndcapAvailThickness" value="(SolenoidYokeEndcap_zmin - 10.0 * mm) - HcalEndcap_zmin"/>
<comment> Material Thickness </comment>
<constant name="HcalSteelThickness" value="1.89 * cm"/>
<constant name="HcalPyrexThickness" value="1.10 * mm"/>
<constant name="HcalRPCGasThickness" value="1.20 * mm"/>
<constant name="HcalG10Thickness" value="3.00 * mm"/>
<constant name="HcalAirThickness" value="1.60 * mm"/>
<comment> Layer Thickness </comment>
<constant name="HcalOneLayerThickness"
value="HcalSteelThickness + (2 * HcalPyrexThickness) + HcalRPCGasThickness + HcalG10Thickness + HcalAirThickness"/>
<comment> H Barrel Layers and Thickness </comment>
<constant name="HcalBarrelLayers" value="floor(HcalBarrelAvailThickness / HcalOneLayerThickness)"/>
<constant name="HcalBarrelThickness" value="HcalBarrelLayers * HcalOneLayerThickness"/>
<comment> H Endcap Layers and Thickness </comment>
<constant name="HcalEndcapLayers" value="floor(HcalEndcapAvailThickness / HcalOneLayerThickness)"/>
<constant name="HcalEndcapThickness" value="HcalEndcapLayers * HcalOneLayerThickness"/>
<comment>
----------------------
Zero Degree Parameters
----------------------
</comment>
<comment> BeamLines: IP6 </comment>
<constant name="ffi_ZDC_x_pos" value="90.0 * cm"/>
<constant name="ffi_ZDC_y_pos" value="0.0 * cm"/>
<constant name="ffi_ZDC_z_pos" value="3800.0 * cm"/>
<constant name="ffi_ZDC_rotateX_angle" value="0.0 * rad"/>
<constant name="ffi_ZDC_rotateY_angle" value="-0.0125 * rad"/>
<constant name="ffi_ZDC_rotateZ_angle" value="0.0 * rad"/>
<comment> BeamLines: IP8 </comment>
<!--
<constant name="ffi_ZDC_x_pos" value="127.0 * cm"/>
<constant name="ffi_ZDC_y_pos" value="0.0 * cm"/>
<constant name="ffi_ZDC_z_pos" value="3600.0 * cm"/>
<constant name="ffi_ZDC_rotateX_angle" value="0.0 * rad"/>
<constant name="ffi_ZDC_rotateY_angle" value="-0.025 * rad"/>
<constant name="ffi_ZDC_rotateZ_angle" value="0.0 * rad"/>
-->
<comment> Global parameters </comment>
<constant name="ffi_ZDC_width" value="60.0 * cm"/>
<constant name="ffi_ZDC_thickness" value="200.0 * cm"/>
<comment> Original Global parameters </comment>
<!--
<constant name="ffi_ZDC_thickness" value="250.0 * cm"/>
-->
<constant name="ffi_ZDC_ECAL_thickness" value="30.0 * cm"/>
<constant name="ffi_ZDC_ECAL_inner_radius" value="0.0 * cm"/>
<constant name="ffi_ZDC_ECAL_outer_radius" value="60.0 * cm"/>
<constant name="ffi_ZDC_ECAL_width" value="5.0 * cm"/>
<constant name="ffi_ZDC_ECAL_gap" value="5.0 * mm"/>
<constant name="ffi_ZDC_ECAL_ntower" value="10"/>
<comment> Original number of towers parameter </comment>
<!--
<constant name="ffi_ZDC_ECAL_ntower" value="20"/>
-->
<comment>
-----------------------
Gaseous RICH Parameters
-----------------------
</comment>
<constant name="RICHZMin" value="SolenoidYokeEndcap_zmin + 1 * cm"/>
<constant name="RICHRMin" value="15 * cm"/>
<constant name="RICHRMax" value="60 * cm"/>
<constant name="RICHDepth" value="1 * m"/>
<comment>
--------------------------
Forward Tracker Parameters
--------------------------
</comment>
<constant name="TempForwardTrackerSpace" value="1.5 * m"/>
<constant name="ForwardEcalZMin" value="RICHZMin + RICHDepth + TempForwardTrackerSpace"/>
<constant name="ForwardCaloAngle" value="2 * SolenoidYokeChamferAngle"/>
<constant name="ForwardEcalRInner" value="10 * cm"/>
<constant name="ForwardEcalROuter" value="EcalBarrel_rmin + tan(SolenoidYokeChamferAngle) * (RICHDepth) + tan(ForwardCaloAngle) * (ForwardEcalZMin - RICHZMin - RICHDepth)"/>
<constant name="ForwardHcalZMin" value="RICHZMin + RICHDepth + TempForwardTrackerSpace + EcalEndcapThickness + 1 * mm"/>
<constant name="ForwardHcalAngle" value="ForwardCaloAngle"/>
<constant name="ForwardHcalRInner" value="10 * cm"/>
<constant name="ForwardHcalROuter" value="ForwardEcalROuter + tan(ForwardCaloAngle) * (ForwardHcalZMin - ForwardEcalZMin)"/>
<comment>
--------------------------
Forward ECal Parameters
--------------------------
</comment>
<comment>
--------------------------
Forward HCal Parameters
--------------------------
</comment>
<comment>
--------------------------
ce_MRICH Parameters
--------------------------
</comment>
<constant name="ce_MRICHRMin" value="15*cm"/>
<constant name="ce_MRICHRMax" value="100*cm"/>
<constant name="ce_MRICHLength" value="15*cm"/>
<constant name="ce_MRICHZMin" value="-EcalEndcap_zmin+10.*cm"/>
</define>