| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ion detector capable of improving the detection efficiency of positive ions and negative ions. <P>SOLUTION: An ion detector 1 comprises: a chamber 2 provided with an ion entrance 3 to make positive ions and negative ions enter; a conversion dynode 8 which is disposed in the chamber 2 and to which a negative potential is applied; a scintillator 11 which is disposed in the chamber 2 and has an electron incident surface 11a which is opposed to the conversion dynode 8 and into which secondary electrons emitted from the conversion dynode 8 are made incident; a conductive layer 13 which is formed on the electron incident surface 11a and to which a positive potential is applied; and a photomultiplier 15 which detects light emitted by the scintillator 11 in response to incidence of the secondary electrons. <P>COPYRIGHT: (C)2012,JPO&INPIT |
