The new photon detector fixes the primary flaws of the PMT, namely its large size and its sensitivity to magnetic fields. The Silicon Photomultiplier (SiPM) uses a completely different method of detecting photons. | The new photon detector fixes the primary flaws of the PMT, namely its large size and its sensitivity to magnetic fields. The Silicon Photomultiplier (SiPM) uses a completely different method of detecting photons. |