Monte Carlo simulations for tilted-channel electron multipliers

Microchannel electron multipliers with tilted structures are simulated using the Monte Carlo method. Gains of secondary electrons are calculated for different structures of the electron multiplier. For a short tilted cylindrical channel of the electron multiplier, a maximum gain is achieved greater than 10/sup 4/ at a tilt angle near 25/spl deg/. The maximum gain is about 10/sup 3/ times larger than that of the nontilted channel. An explanation for the improvement of gain in tilted channel is suggested.