PHOTOMULTIPLIER TUBE WITH EXTENDED DYNAMIC RANGE

摘要

The present invention relates to an optoelectronic multiplier having an extended dynamic range. According to various embodiments, a repulsive electric field is introduced between the photocathode and the plurality of dienodes to push or block low energy electrons from reaching and multiplying by the dienode. As a result, since the photomultiplier current will be primarily affected by the high energy electrons emitted by the photocathode in response to incident illumination to the low energy electrons, the time interval between the current peak and the drop may be reduced, and the low energy Some of the electrons may arise from dangling bonds or slow surface states after illumination no longer hits the photocathode. The dynamic range and optical response of the photomultiplier tube is thus increased.