Multichannel Gas Electron Multipliers with Metal Electrodes

摘要

Results of studying multichannel gas electron multipliers with 1-mm-thick metal electrodes, perforated over the entire working area by 1-mm-diameter holes with a 1.5-mm distance between them, and a 3-mm gap between the electrodes are described. The influence of N_2 and H_2O microadditives on operation of the neon-filled multiplier is studied. When β particles (~(63)Ni) were detected, the maximal proportional electron multiplication factor in neon under pressure of 1 atm (abs.) with quenching additives of (H_2O + N_2) ≈ 100mm~(-1), equal to K_(mlt)~(cmpl) = 3 × 10~4, is obtained.