| US 7,547,880 B2 | ||
| Drift tube for an ion mobility spectrometer with integrated gas channel | ||
| Jürgen Landgraf, Gutenberg (Germany); and Jürgen Riemenschneider, Leipzig (Germany) | ||
| Assigned to Bruker Daltonik GmbH, Bremen (Germany) | ||
| Filed on Feb. 07, 2007, as Appl. No. 11/672,190. | ||
| Claims priority of application No. 10 2006 006 683 (DE), filed on Feb. 14, 2006. | ||
| Prior Publication US 2008/0073514 A1, Mar. 27, 2008 | ||
| Int. Cl. H01J 49/40 (2006.01) | ||
| U.S. Cl. 250—287 [250/286] | 14 Claims |
| 1. A drift tube for use in an ion mobility spectrometer, having an axis and comprising:
a plurality of tube segments, each of the tube segments having a first aperture and a second aperture, unconnected to the
first aperture, both apertures passing through that tube segment;
means for connecting the tube segments in a stack with gas-tight connections between the tube segments so that the first apertures
line up to form a drift region having a constant cross-section and extending along the axis of the drift tube and the second
apertures line up to form a gas channel extending parallel to the axis of the drift tube; and
wherein at least one tube segment having a first aperture and a second aperture connected to the first aperture by a gas channel
that extends transverse to the axis of the drift tube, is inserted into the stack so that the first aperture lines up with
the drift region and the second aperture lines up with the gas channel and the drift region is connected to the gas channel
at the location of that tube segment.
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