| 摘要 |
A drift chamber for an ion mobility spectrometer includes an array of conductive electrodes (12, 14, 16, 18) mounted upon a common insulating substrate (10) such as a printed circuit board. The printed circuit board may also form one side of a rectangular enclosure (24), thus allowing the drift chamber to be substantially smaller than previously. The printed circuit board may have a track (60) around its periphery to which the rectangular enclosure (24) can be attached, thus creating a gas-tight seal.
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