| Abstract: | The reolution characteristic of GaAs/GaAlAs trransmission photocathode is an important parameter in third generation intensifiers.The modulation transfer function of GaAs/GaAlAs transmission photocathode is derived from a simple two-dimensional diffusion equation.The theoretical resolution characteristic of a 2 μm thick GaAs/GaAlAs transmission photocathode is calculated.The relationship between resolution and parameters in GaAs/GaAlAs transmission photocathode is discussed.A conclusion is shown that one can design the GaAs/GaAlAs transmission photocathode for maximum quantum efficiency,since the sacrifice in the resolution doesn‘t limit system performances. |
