Welcome to the home page for the milliQan experiment. The milliQan experiment is a dedicated detector designed to discover “millicharged particles,” which are hypothesized in a variety of dark sector models that are invoked to explain astrophysically observed galactic dark matter.
It consists of two plastic scintillator arrays deployed in a tunnel 70 m underground 33 m above the Large Hadron Collider (LHC) beam interaction point (IP) of the Compact Muon Solenoid (CMS) at at CERN in Geneva, Switzerland. The arrays are aligned to the CMS IP such that they would intercept the flux of any millicharged particles that could be produced by the LHC collisions. The “bar” detector array was in installed/commissioned and in 2023 and is shown in the photo on the left. The “slab” detector” array was in installed/commissioned in 2024 is shown in the photo on the right. Both detectors are fully operational and are recording data continuously when the LHC is colliding beams.
