STAR Detector Components (IMAGE)

DOE/Brookhaven National Laboratory

STAR Detector Components

Caption

This model of the STAR detector shows the main detector components used in this result. Electrons from W- boson decays (or positrons from W+ decays) are tracked inside a magnetic field using the Time-Projection Chamber (TPC). The magnetic field causes negative and positive particles to curve in opposite ways, allowing scientists to identify which is which. The Barrel Electromagnetic Calorimeter (BEMC) measures the energy of particles emerging from collisions perpendicular from the colliding beams, while the Electromagnetic Endcap Calorimeter (EEMC) does the same for particles emerging in the forward direction. This image shows a simulated electron track (red) pointing to a large localized energy deposition in the BEMC (also red).

Credit

Courtesy: T. Sakuma

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