Electron Bubble Particle Detector

Columbia University's Department of Physics
Nevis Laboratories

Electron detection

• There are several sources of electrons injected into the cryogenic liquid are foreseen:
  • Visible light beam from a flash lamp, to give a variable number of single electrons
  • Radioactive source of low energy electros, to give a point source of lightly ionizing particle
  • Alpha or Beta particles, to give a point of energetic, heavily ionizing particle
  • Energetic photon from a beam at an accelerator
• Electron detection uses charge collection and amplification devices mounted at the top of the drift volume, again examining the charges in one plane at a given time
• Electron avalanche, breakdown, electron movement in cryogenic liquid and at liquid/vapor interface
• Multiple electron bubbles