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来源：蜘蛛抓取(WebSpider) 时间：2016-04-22 02:27 标签： 陈小春应采儿
A large-area time-of-flight system for a colliding beam machine
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, 1 February 1981, Pages 477-485
A large-area time-of-flight system for a colliding beam machine
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Istituto di Fisica, Università di Bologna, Bologna, Italy
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Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
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CERN, Geneva, Switzerland
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Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Frascati, Italy
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We describe the performance of a large solid-angle (2 sr) time-of-flight system used in conjunction with the Split Field Magnet spectrometer of the CERN Intersecting Storage Rings (ISR). The system consists of a hodoscope of 67 scintillator counters, at a distance of about 5 m from the beam intersection. The ISR being a coasting beam machine, contrary to the tightly bunched e+e- machines, the event time is unknown and therefore a special analysis procedure for particle identification is required.We illustrate a powerful statistical method which allows the identification, with more than 90% efficiency, of pions up to about 1 GeV/c, kaons up to about 1.4 GeV/c, and protons up to about 2 GeV/c.
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