Electron multiplier and photomultiplier including the same

摘要

The present invention relates to an electron multiplier and others to effectively suppress luminescence noise, even in compact size, in which each of multistage dynodes has a plurality of columns each having a peripheral surface separated physically, and in which each column is processed in such a shape that an area or a peripheral length of a section parallel to an installation surface on which the electron multiplier is arranged becomes minimum at a certain position on the peripheral surface in the column of interest.

主权项

1. An electron multiplier comprising multistage dynodes arranged in series on a installation surface, along a first direction on the installation surface, and configured to implement cascade multiplication of electrons traveling along a direction parallel to the first direction, each of the multistage dynodes comprising:
a common pedestal extending along a second direction on the installation surface, the second direction being perpendicular to the first direction; and a plurality of columns, each column extending along a third direction perpendicular to both the first and second directions, each column being arranged on the common pedestal in a state in which the columns are spaced apart by a predetermined distance; wherein all of the common pedestals of the multistage dynodes are in direct contact with the installation surface while being arranged in series on the installation surface along the first direction, and wherein, in each of the multistage dynodes, at least any one column out of the plurality of columns has a cross-section in a horizontal plane parallel to the installation surface that varies in at least one of size or shape depending upon the height of the column in the third direction.