Gaseous ionization detectors

Straw detectors are particle detectors, can be captured and detected with those moving particles (molecules, atoms or elementary particles). Straw a detector typically is comprised of a cylindrical drift chamber in which the electrons from the ionization site in the particle to the anode migrate.

A drift chamber has, for example, about 1 meter in length and 1 cm in diameter and consists of several thousand drift tubes ( " straws ").

Straw detectors provide accurate detection of the tracks of charged particles near the target, ie in the interaction region. Using highly integrated electronic chips are increasingly the Straw signals and distinguished from each other. The achievable time resolution is about 0.1 ns.