PROBLEM TO BE SOLVED: To provide an MCP(microchannel plate) and a secondary electron amplification device that can provide high secondary electron amplification, with a simple structure. ;SOLUTION: A layer of a secondary electron emission metal 14 is formed on the inside wall of each taper-like thin tube 13 of which emission side has a small diameter, and incident electrons 12 collide against the secondary electron emission metal 14 and are multiplied so that secondary electrons 15 are emitted as emitted electrons 16. Because an electron collision path in the emission side is shortened as compared with the incident side in the inside of the taper-like thin tube 13, an energy amount which the electrons lose during its movement in the emission side in the tube is small, their impact energy with the secondary emission metal 14 is kept in a high level and a large number of secondary electrons are emitted similarly to the incident side in the tube, and the electron density of the emission side in the tube is enhanced.;COPYRIGHT: (C)2000,JPO
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