ORTHOGONAL ACCELERATION TIME-OF-FLIGHT MASS SPECTROMETER AND LEAD-IN ELECTRODE THEREFOR

摘要

This lead-in electrode 132B of an orthogonal acceleration time-of-flight mass spectrometer 1 comprises: a main body 132B2a having an ion passing part 132B2a; a first member 132B1 provided with a main body accommodation part 132B1a that is as a through-hole for accommodating the main body, and having, on one surface thereof, an extension part 132B1b that is provided to define the position of one surface of the main body accommodated in the main body accommodation part; a second member 132B3 which is mounted on the first member accommodating the main body, and is provided with a through-hole 132B3a at a position in which at least a portion of the ion passing part is not blocked, the second member 132B3 having, on one surface, a first region that contacts the reverse surface of the first member from said one surface of the first member, and a second region 132B3b that is positioned further inside than the first region and formed lower than the contacted surface of the first region; and a lead-in electrode elastic member 132B4 that is in the second region and disposed between the first member and the second member.