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EICG4dRICHConfig.hh
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1 #ifndef EICG4dRICHConfig_HH
2 #define EICG4dRICHConfig_HH
3 
4 #include <G4GenericMessenger.hh>
5 #include <G4SystemOfUnits.hh>
6 
7 struct EICG4dRICHConfig
8 {
9 
10  // define here Global volume parameters
11  double RIn = 9.;
12  double ROut = 220 * cm;
13  double ThicknessZ = 170 * cm;
14  double PosZ = 200. * cm;
15 
16  //
17  // RICH is made of 6 identical trucated cone sectors (TBD: probably one or
18  // more sectors shall be different due to the asymmetry in the beam pipes)
19  // Each sector components have identical relative disposition
20  // Each sector is symmetric respect to the cone bysector ...
21 
22  /* model data:
23  material, geometry and placement are defined here
24  */
25 
26  G4String model_file = "drich-model0.txt";
27 
28  /*
29  double vessel_z0 = 300*cm; // position of the vessel entrance window along
30  z respect to the overall spectrometer ??? double vessel_dz = 170*cm; //
31  Vessel longitudinal length (external) - 0 thickness for the moment double
32  vessel_radius_in = 10*cm; // Vessel internal radius (around beam pipe)
33  double vessel_radius_out0 = 130.*cm; // Vessel external radius at entrance
34  double vessel_radius_out1 = 210.*cm; // Vessel external radius at exit
35  (behind the mirror) double aerogel_dz = 2*cm; // aerogel thickness double
36  filter_dz = 0.3*mm; // wavelength filter thickness double mirror_radius =
37  290*cm; // mirror radius double mirror_center_z = -210*cm; // mirror center
38  z position - relative to vessel center double mirror_center_t = 145*cm; //
39  mirror center transverse position - relative to vessel center double
40  mirror_theta = 40*deg; // mirror polar aperture
41 
42  double sensor_z = 0; // sensor center along z - relative to vessel center
43  double sensor_t = 0; // sensor center along tranverse z - relative to vessel
44  center
45  */
46 
47  /* optical data:
48  aerogel dispersione relation n_aerogel(lambda)
49  aerogel scattering length vs lambda
50  aerogel absorption length vs lambda
51  wavelength filter transmission curve vs lambda
52  gas dispersione relation n_gas(lambda)
53  gas absorption lenghth vs lambda (likely constant)
54  mirror refractive curve vs lambda
55  sensor quantum efficiency (embedded in the code or external ?)
56  */
57  // G4String optical_file = "drich-optical.txt";
58 
59  // optical properties
60  int aerOptModel = 3; // aerogel optical model used to estimate the refractive Index
61  double filter_thr = 300 * nm; // wavelength filter cutoff
62 
63  double aerogel_n = 1.03; // aerogel refractive index, at reference wavelength
64  double gas_n = 1.0008; // gas refractive index, at reference wavelength
65  double wavelength_ref = 400 * nm; // reference wavelength (for aerogel, gas, mirror ...)
66 
67  // Create a global messenger that will be used
68  inline EICG4dRICHConfig()
69  {
70  static G4GenericMessenger *Messenger;
71 
72  if (!Messenger)
73  {
74  // Set geant options
75  Messenger = new G4GenericMessenger(this, "/EICG4dRICH/");
76 
77  // Messenger->SetDirectory("Vessel"); // TBC if ok, we can define a dir
78  // for each sub-components of the EICG4dRICH
79  /*
80  auto cmd = Messenger->DeclarePropertyWithUnit("VesselLength", "cm",
81  vessel_dz, "Rich Vessel Longitudinal size, along beam (z), cone
82  height"); cmd.SetParameterName("vl",true); cmd.SetRange("vl>0,");
83  cmd.SetDefaultValue("170");
84  Messenger->DeclarePropertyWithUnit("VesselPositionZ0", "cm", vessel_z0,
85  "Rich Vessel Entrance Window Position along z");
86  Messenger->DeclarePropertyWithUnit("VesselRadiusIn", "cm",
87  vessel_radius_in, "Rich Vessel Internal Radius (near beam pipe)");
88  Messenger->DeclarePropertyWithUnit("VesselRadiusOut0", "cm",
89  vessel_radius_out0, "Rich Vessel External Radius at entrance");
90  Messenger->DeclarePropertyWithUnit("VesselRadiusOut1", "cm",
91  vessel_radius_out1, "Rich Vessel External Radius at exit, after
92  mirror"); Messenger->DeclarePropertyWithUnit("AerogelThick", "cm",
93  aerogel_dz, "Aerogel Thickness");
94  Messenger->DeclarePropertyWithUnit("FilterThick", "mm", filter_dz,
95  "High-Pass Filter Thickness");
96  Messenger->DeclarePropertyWithUnit("MirrorRadius", "cm", mirror_radius,
97  "Mirror Radius"); Messenger->DeclarePropertyWithUnit("MirrorCenterZ",
98  "cm", mirror_center_z, "Mirror Center - longitudinal, Z relative to
99  Vessel center"); Messenger->DeclarePropertyWithUnit("MirrorCenterT",
100  "cm", mirror_center_t, "Mirror Center (x/y plane) Transverse, relative
101  to Vessel center"); Messenger->DeclarePropertyWithUnit("MirrorTheta",
102  "deg", mirror_theta, "Mirror Polar Aperture");
103  Messenger->DeclarePropertyWithUnit("SensorZ", "cm", sensor_z, "Sensor
104  Center - longitudinal, Z relative to Vessel center");
105  Messenger->DeclarePropertyWithUnit("SensorT", "cm", sensor_t, "Sensor
106  Center - Transverse (x/y plane) relative to Vessel center");
107  */
108 
109  Messenger->DeclareProperty("ModelFile", model_file,"Full path of the drich model text data");
110 
111  auto cmd0 = Messenger->DeclareProperty(
112  "AerogelRefractiveIndex", aerogel_n,
113  "Aerogel Radiator Refractive Index at reference wavelength");
114  cmd0.SetParameterName("aerogeln", true);
115  cmd0.SetRange("aerogeln>1.0");
116  cmd0.SetDefaultValue("1.03");
117 
118  auto cmd1 = Messenger->DeclareProperty(
119  "GasRefractiveIndex", gas_n,
120  "Gas Radiator Refractive Index at reference wavelength");
121  cmd1.SetParameterName("gasn", true);
122  cmd1.SetRange("gasn>1.0");
123  cmd1.SetDefaultValue("1.0008");
124 
125  auto cmd2 = Messenger->DeclarePropertyWithUnit(
126  "ReferenceWavelength", "nm", wavelength_ref, "Reference wavelength");
127  cmd2.SetParameterName("wlref", true);
128  cmd2.SetRange("wlref>0");
129  cmd2.SetDefaultValue("400.e-9");
130 
131  auto cmd3 = Messenger->DeclarePropertyWithUnit(
132  "FilterThreshold", "nm", filter_thr,
133  "Wavelength threshold of acrylic filter");
134  cmd3.SetParameterName("wlfil", true);
135  cmd3.SetRange("wlfil>0.");
136  cmd3.SetDefaultValue("300.e-9");
137 
138  auto cmd4 = Messenger->DeclareProperty(
139  "AerogelOpticalModel", aerOptModel,
140  "Aerogel Optical Model for Refractive Index (0:Vorobiev, 1:Sellmeier "
141  "CLAS12, 2: LHCb, 3: scale exp. points");
142  cmd4.SetParameterName("aerOptMod", true);
143  cmd4.SetDefaultValue(3);
144 
145  // Messenger->DeclareProperty("GeometryFile", geometry_file, "Full
146  // path of Geometry configuration file (e.g. sensor array coordinates
147  // ...)");
148  // Messenger->DeclareProperty("OpticalFile", optical_file, "Full path of
149  // Optical configuration file (e.g. sensor quantum efficienct curve,
150  // mirror transmittance, radiators dispersion relations ...)");
151  }
152  }
153 };
154 
155 #endif // EICG4dRICHConfig_HH