Electron Transmission and Avalanche Gain in Narrow Lead Glass Tubing

Electron drift structures have been manufactured from small diameter lead glass tubing. Baking the tubing in a reducing atmosphere produces a resistive metallic layer which can be used as a continuous voltage divider for drift field shaping. Some preliminary measurements of electron transmission through such structures were made and some modest avalanche gain within the tubing was observed. Possible applications in the suppression of photon feedback in Ring Imaging Cerenkov Counters and in improving the time resolution in positron emission tomography are discussed.