1. Drift tube ion mobility is widely used for structure analysis.2. This drift tube prevents backflow of electromagnetic radiation. 3. The first segment has 5 vacuum vessel for drift tubes , operating at 201 MHz. 4. It requires a drift tube several feet in length to allow the electrons to bunch. 5. The drift tube ( DT ) system measures muon positions in the barrel part of the detector. 6. The drift tubes measure particle coordinates in X and Y with a typical accuracy of several hundred micrometers. 7. This muon tracker is constructed from sealed aluminum drift tubes , which are grouped into twenty-four planes. 8. High voltage DC on a cylindrical anode accelerates the modulated electron beam through a small drift tube like a klystron. 9. The detecting elements are drift tubes ( straws ), each four millimetres in diameter and up to 144 centimetres long. 10. This takes time to complete as the electrons drift down the tube, leading to their alternate name " drift tubes ".