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Author(s):
J. Uramoto
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Title:
Pair Creation of Negative and Positive Pionlike (Muonlike) Particle by Interaction between an Electron Bunch and a Positive Ion Bunch
Date of publication:
Dec. 1997
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Key words:
negative pionlike particle pi^-, positive pionlike particle pi^+, apparent current increment
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Abstract:
Both negative pionlike (pi^-) or muonlike (mu^-) particles and positive pionlike (pi^+) or muonlike (mu^+) particles are created by an electron bunch and a positive ion bunch which are generated from a low energy (~ 1 keV) electron beam and a neutral gas, which are detected by a magnetic mass analyzer (MA). Then, the pi^- and mu^- particles are detected easily as the apparent current to the beam collector (BC) of MA increases extremely when a positive bias voltage is applied to BC and positive ions are supplied in front of BC. On the other hand, it is difficult to detect the pi^+ and mu^+ particles as the apparent current increment on BC and the space charge neutralization inside MA do not occur. It should be noted that the pi^+ or mu^+ particles do not penetrate a metal plate while the pi^- or mu^- particles penetrate the metal plate easily.
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