Monte Carlo Study of Ortho-Positronium Laser Cooling
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概要
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On the basis of three dimensional (3-D) Monte Carlo simulation, we studied details of laser cooling (Doppler cooling) of ortho-Positronium (o-Ps) which would be applied to the achievement of Bose–Einstein condensation of positronium. The cooling is carried out by an ultraviolet laser with a wavelength of 243 nm being equivalent to the 1S–2P transition energy of o-Ps. For this purpose, we have constructed a laser cooling apparatus which consists of a slow positron generator and a long pulse, wide linewidth laser. A 3-D Monte Carlo calculation, which incorporated various parameters of laser beam and positronium distributions expected in the current laser cooling apparatus, revealed that 7% of o-Ps was able to be cool down to 1 K and to be confined in a relatively small volume without employing a special trap.
- 2001-11-15
著者
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Kajita Masatoshi
Communications Research Laboratory
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Hirose Tachishige
Department Of Physics Faculty Of Science Tokyo Metropolitan University
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Yabu Hiroyuki
Department Of Physics Kyoto University
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Kumita Tetsuro
Department Of Physics Tokyo Metropolitan University
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Irako Mitsuhiro
Department Of Physics Faculty Of Science Tokyo Metropolitan University
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Iijima Hokuto
Department Of Physics Tokyo Metropolitan University
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Wada Kazuyuki
Department Of Information And Computer Sciences Toyohashi University Of Technology Toyohashishi
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Hirose Tachishige
Department of Physics, Tokyo Metropolitan University,
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Iijima Hokuto
Department of Physics, Tokyo Metropolitan University,
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Yabu Hiroyuki
Department of Physics, Tokyo Metropolitan University,
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Wada Kazuyuki
Department of Physics, Tokyo Metropolitan University,
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Irako Mitsuhiro
Department of Physics, Tokyo Metropolitan University,
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Kajita Masatoshi
Communications Research Laboratory,
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