论文信息 - A Large Area Transition Radiation Detector for theNOMAD

A Large Area Transition Radiation Detector for theNOMAD

A Transition Radiation Detector to identify electrons at 90% ef-ciency with a rejection factor against pions of 10 3 on an area of 2:85 2:85 m 2 has been constructed for the NOMAD experiment. Each of its 9 modules includes a 315 plastic foil radiator and a detector plane of 176 vertical straw tubes lled with a xenon-methane gas mixture. Details of the design, construction and operation of the detector are given.

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