title: Development of position sensitive radiation detectors using gas electron multipliers.
abstract: Gas electron multipliers (GEM) were introduced to develop a radiation detector which is applicable to medical imaging or luggage inspection systems at the airport or harbor. Two GEM foils were used in the amplifier, and an Ar/CO(2) mixed gas was inserted into the chamber at a mixing ratio of Ar:CO(2)=80:20. A two-dimensional X-ray image was taken with a 64-channel GEM detector from an Fe-55 radiation source. We also constructed a 256-channel GEM detector in which 4 charge sensitive preamplifiers were used in a daisy chain. With linear array type readout electrodes, we were able to realize a position sensitive radiation detector.
authors.affiliation: Department of Physics, Changwon National University, Changwon 641-773, Republic of Korea.
authors.forename: Seongtae
authors.initials: S
authors.lastname: Park
authors.forename: Chang Hie
authors.initials: CH
authors.lastname: Hahn
mesh_terms: D003952:Diagnostic Imaging; D004583:Electrons; D004867:Equipment Design; D005740:Gases; D011874:Radiometry / Q000295:instrumentation*; D023481:Terrorism / Q000517:prevention & control; D014965:X-Rays
chemical_list: D005740:Gases