Bar-center positions of the trigger-scintillator modules. More...

#include <TrigScintGeometry.h>

Public Member Functions
	TrigScintGeometry (const framework::config::Parameters &ps)
	Build from a python-configured parameter set.

ROOT::Math::XYZVector	getBarPosition (int module, int bar) const
	Global bar-center position for a (module, bar).

ROOT::Math::XYZVector	getBarPosition (ldmx::TrigScintID id) const
	Convenience overload taking a TrigScintID.

int	getNumModules () const
	Number of configured modules.

int	getNumBars () const
	Number of bars (channels) per module.

double	getLayerZSeparation () const
	z separation between the two layers within a module [mm].

Public Member Functions inherited from framework::ConditionsObject
	ConditionsObject (const std::string &name)
	Class constructor.

virtual	~ConditionsObject ()
	Destructor.

std::string	getName () const
	Get the name of this object.

Static Public Attributes
static constexpr const char *	CONDITIONS_OBJECT_NAME {"trig_scint_geometry"}
	Name this conditions object is registered under (must match the python provider field name).

Private Attributes
std::vector< double >	module_z_
	global z of each module's (layer-pair) center [mm]

double	y0_
	global y of bar 0 [mm] (bar 0 is most +y)

double	layer_pitch_
	in-layer y pitch [mm]

double	layer_y_shift_
	y stagger of layer 1 relative to layer 0 [mm]

double	layer_z_sep_
	z separation between the two layers within a module [mm]

int	n_bars_
	number of bars (channels) per module

Detailed Description

Bar-center positions of the trigger-scintillator modules.

The TS bars measure y. Each module is two staggered layers of n_bars/2 bars; the decoded channel id (bar, 0..n_bars-1) is split as layer = bar % 2, in-layer index = bar / 2. Positions are computed from parameters that mirror the detector GDML constants (per-module z, in-layer y pitch, layer y stagger, layer z separation, and the y of channel 0). This is delivered as a conditions object so reco (e.g. the TS -> ldmx::Measurement producer) reads geometry from here instead of hard-coding it.

Definition at line 37 of file TrigScintGeometry.h.

Constructor & Destructor Documentation

◆ TrigScintGeometry()

ldmx::TrigScintGeometry::TrigScintGeometry ( const framework::config::Parameters & ps )

Build from a python-configured parameter set.

Definition at line 5 of file TrigScintGeometry.cxx.

    : framework::ConditionsObject(TrigScintGeometry::CONDITIONS_OBJECT_NAME) {
  module_z_ = ps.get<std::vector<double>>("module_z");
  y0_ = ps.get<double>("y0");
  layer_pitch_ = ps.get<double>("layer_pitch");
  layer_y_shift_ = ps.get<double>("layer_y_shift");
  layer_z_sep_ = ps.get<double>("layer_z_sep");
  n_bars_ = ps.get<int>("n_bars");
}

References framework::config::Parameters::get(), layer_pitch_, layer_y_shift_, layer_z_sep_, module_z_, n_bars_, and y0_.

Member Function Documentation

◆ getBarPosition() [1/2]

ROOT::Math::XYZVector ldmx::TrigScintGeometry::getBarPosition	(	int	module,
		int	bar ) const

Global bar-center position for a (module, bar).

Parameters

module	module index (0-based; index into module_z)
bar	decoded channel id, 0..n_bars-1

Returns: (x, y, z) [mm]; x is the bar center (0), y the measured coordinate.

Definition at line 15 of file TrigScintGeometry.cxx.

                                                                       {
  if (module < 0 || module >= static_cast<int>(module_z_.size())) {
    EXCEPTION_RAISE("TrigScintGeometry",
                    "Requested module " + std::to_string(module) +
                        " is out of range [0," +
                        std::to_string(module_z_.size()) + ").");
  }
  if (bar < 0 || bar >= n_bars_) {
    EXCEPTION_RAISE("TrigScintGeometry", "Requested bar " +
                                             std::to_string(bar) +
                                             " is out of range [0," +
                                             std::to_string(n_bars_) + ").");
  }
 
  // two staggered layers: bar/2 = in-layer index, bar%2 = layer
  const int in_layer = bar / 2;
  const int layer = bar % 2;
  const double y = y0_ - (layer_pitch_ * in_layer + layer_y_shift_ * layer);
  const double z = module_z_[module] + (layer == 1 ? 0.5 : -0.5) * layer_z_sep_;
  return ROOT::Math::XYZVector(0.0, y, z);
}

References layer_pitch_, layer_y_shift_, layer_z_sep_, module_z_, n_bars_, and y0_.

Referenced by getBarPosition().

◆ getBarPosition() [2/2]

ROOT::Math::XYZVector ldmx::TrigScintGeometry::getBarPosition ( ldmx::TrigScintID id ) const

inline

Convenience overload taking a TrigScintID.

Definition at line 57 of file TrigScintGeometry.h.

                                                             {
    return getBarPosition(id.module(), id.bar());
  }

References getBarPosition().

◆ getLayerZSeparation()

double ldmx::TrigScintGeometry::getLayerZSeparation ( ) const

inline

z separation between the two layers within a module [mm].

Definition at line 66 of file TrigScintGeometry.h.

66{ return layer_z_sep_; }

References layer_z_sep_.

◆ getNumBars()

int ldmx::TrigScintGeometry::getNumBars ( ) const

inline

Number of bars (channels) per module.

Definition at line 64 of file TrigScintGeometry.h.

64{ return n_bars_; }

References n_bars_.

◆ getNumModules()

int ldmx::TrigScintGeometry::getNumModules ( ) const

inline

Number of configured modules.

Definition at line 62 of file TrigScintGeometry.h.

62{ return static_cast<int>(module_z_.size()); }

References module_z_.

Member Data Documentation

◆ CONDITIONS_OBJECT_NAME

const char* ldmx::TrigScintGeometry::CONDITIONS_OBJECT_NAME {"trig_scint_geometry"}

staticconstexpr

Name this conditions object is registered under (must match the python provider field name).

Definition at line 41 of file TrigScintGeometry.h.

41{"trig_scint_geometry"};

Referenced by tracking::reco::TrigScintMeasurementProducer::produce().

◆ layer_pitch_

double ldmx::TrigScintGeometry::layer_pitch_

private

in-layer y pitch [mm]

Definition at line 74 of file TrigScintGeometry.h.

Referenced by getBarPosition(), and TrigScintGeometry().

◆ layer_y_shift_

double ldmx::TrigScintGeometry::layer_y_shift_

private

y stagger of layer 1 relative to layer 0 [mm]

Definition at line 76 of file TrigScintGeometry.h.

Referenced by getBarPosition(), and TrigScintGeometry().

◆ layer_z_sep_

double ldmx::TrigScintGeometry::layer_z_sep_

private

z separation between the two layers within a module [mm]

Definition at line 78 of file TrigScintGeometry.h.

Referenced by getBarPosition(), getLayerZSeparation(), and TrigScintGeometry().

◆ module_z_

std::vector<double> ldmx::TrigScintGeometry::module_z_

private

global z of each module's (layer-pair) center [mm]

Definition at line 70 of file TrigScintGeometry.h.

Referenced by getBarPosition(), getNumModules(), and TrigScintGeometry().

◆ n_bars_

int ldmx::TrigScintGeometry::n_bars_

private

number of bars (channels) per module

Definition at line 80 of file TrigScintGeometry.h.

Referenced by getBarPosition(), getNumBars(), and TrigScintGeometry().

◆ y0_

double ldmx::TrigScintGeometry::y0_

private

global y of bar 0 [mm] (bar 0 is most +y)

Definition at line 72 of file TrigScintGeometry.h.

Referenced by getBarPosition(), and TrigScintGeometry().

The documentation for this class was generated from the following files:

DetDescr/include/DetDescr/TrigScintGeometry.h
DetDescr/src/DetDescr/TrigScintGeometry.cxx

Public Member Functions

Static Public Attributes

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ TrigScintGeometry()

Member Function Documentation

◆ getBarPosition() [1/2]

◆ getBarPosition() [2/2]

◆ getLayerZSeparation()

◆ getNumBars()

◆ getNumModules()

Member Data Documentation

◆ CONDITIONS_OBJECT_NAME

◆ layer_pitch_

◆ layer_y_shift_

◆ layer_z_sep_

◆ module_z_

◆ n_bars_

◆ y0_