| US 7,589,320 B2 | ||
| Mass spectrometer | ||
| Takashi Baba, Kawagoe (Japan); Hiroyuki Satake, Kokubunji (Japan); and Izumi Waki, Tokyo (Japan) | ||
| Assigned to Hitachi High-Technologies Corporation, Tokyo (Japan) | ||
| Filed on Oct. 31, 2007, as Appl. No. 11/979,219. | ||
| Application 11/979219 is a continuation of application No. 11/338844, filed on Jan. 25, 2006, granted, now 7,309,860. | ||
| Claims priority of application No. 2005-020543 (JP), filed on Jan. 28, 2005; and application No. 2005-160861 (JP), filed on Jun. 01, 2005. | ||
| Prior Publication US 2008/0078930 A1, Apr. 03, 2008 | ||
| Int. Cl. H01J 49/00 (2006.01) | ||
| U.S. Cl. 250—290 [250/281; 250/282] | 15 Claims |
| 1. A method comprising steps of:
introducing an ion to a linear ion trap having linear multipole electrodes applied with a radio frequency electric field,
wall electrodes that are arranged on both ends in an axis direction of the linear multipole electrodes, and a cylindrical
magnetic field-generating unit that generates a magnetic field containing the same axis as the axis of the linear multipole
electrodes;
introducing an electron from an opposite side of the wall electrodes through which the ion is introduced;
dissociating the ion that is introduced in the linear ion trap;
ejecting the dissociated ion from the same side of the wall electrodes that the ion is introduced.
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