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[ALICE 3] FT3 digitization: Change axis convention in disc sensors #15827

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Merged
njacazio merged 2 commits into from
Sep 24, 2026
+24 −11
Merged

[ALICE 3] FT3 digitization: Change axis convention in disc sensors #15827

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[ALICE 3] FT3 digitization: Change axis convention in disc sensors
marcovanleeuwen Sep 22, 2026
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[ALICE3] Git-clang formatting changes
marcovanleeuwen Sep 23, 2026
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2 changes: 1 addition & 1 deletion Detectors/Upgrades/ALICE3/TRKFT3/FT3/simulation/include/FT3Simulation/FT3Module.h
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Original file line number Diff line number Diff line change
Expand Up @@ -83,7 +83,7 @@ class FT3Module
void addDetectorVolume(
TGeoVolume* motherVolume, std::string volumeName, int color, TGeoMedium* med,
unsigned volume_count, double x_mid, double y_mid, double z_mid,
double x_half_length, double y_half_length, double z_half_length);
double x_half_length, double y_half_length, double z_half_length, double rotX = 0);

void add2x1GlueVolume(
TGeoVolume* motherVolume, int layerNumber, int direction, unsigned stave_idx,
Expand Down
33 changes: 23 additions & 10 deletions Detectors/Upgrades/ALICE3/TRKFT3/FT3/simulation/src/FT3Module.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -374,21 +374,33 @@ void FT3Module::addStaveVolume(
void FT3Module::addDetectorVolume(
TGeoVolume* motherVolume, std::string volumeName, int color, TGeoMedium* med,
unsigned volume_count, double x_mid, double y_mid, double z_mid,
double x_half_length, double y_half_length, double z_half_length)
double x_half_length, double y_half_length, double z_half_length, double rotX)
{
TGeoManager* geoManager = gGeoManager;
TGeoVolume* volume = geoManager->MakeBox(volumeName.c_str(), med, x_half_length,
y_half_length, z_half_length);
volume->SetLineColor(color);
volume->SetFillColorAlpha(color, 0.4);
motherVolume->AddNode(
volume,
volume_count,
new TGeoTranslation( // midpoint of box to add
x_mid,
y_mid,
z_mid) // TGeoTranslation
); // addNode
if (rotX == 0.) {
motherVolume->AddNode(
volume,
volume_count,
new TGeoTranslation( // midpoint of box to add
x_mid,
y_mid,
z_mid) // TGeoTranslation
); // addNode
} else {
motherVolume->AddNode(
volume,
volume_count,
new TGeoCombiTrans("",
x_mid,
y_mid,
z_mid,
new TGeoRotation("", 0., rotX, 0.)) // TGeoCombiTrans
); // addNode
}
}

/*
Expand Down Expand Up @@ -463,11 +475,12 @@ void FT3Module::addSingleSensorVolume(
TGeoVolume* sensor;
TGeoManager* geoManager = gGeoManager;
// ACTIVE AREA
// Sensor thickness is along the Y axis; this convention is used in digitisation by barrels and disks
std::string sensor_name = "FT3Sensor_Active_" + std::to_string(direction) + "_" + std::to_string(layerNumber) + "_" + std::to_string(stave_idx) + "_" + std::to_string(volume_count);
addDetectorVolume(
motherVolume, sensor_name, Constants::SiColor, siliconMed,
volume_count, active_x_mid, y_mid, z_mid,
Constants::active_width / 2, Constants::single_sensor_height / 2, Constants::siliconThickness / 2);
Constants::active_width / 2, Constants::siliconThickness / 2, Constants::single_sensor_height / 2, 90.);

// INACTIVE STRIP ON LEFT OR RIGHT
double inactive_x_mid = isLeft ? (active_x_mid - Constants::active_width / 2 - Constants::inactive_width / 2)
Expand Down
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