computing…
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pentagon cell
edge cell
vessel lip
GammaTPC Tracker — geometry
The GammaTPC tracker is a spherical section of double-layered liquid-argon TPC cells with a hexagonal footprint (~20 cm segmentation), housed in a thin carbon-fibre vessel. This explorer lays out that tiling as a Goldberg polyhedron and computes the resulting instrument geometry.
hexagons / pentagonsLAr TPC cells (12 pentagons are unavoidable)
3 concentric layersdouble TPC volume + vessel walls, depth w
opening half-angle θfield-of-view half-angle (90° = 2π hemisphere)
outer skin areaactive tracker area (baseline ≈ 10 m²)
inter-layer volumeactive liquid-argon volume
rounded rimsmooth vessel lip, radius = layer depth