Laser cooling system of ortho-positronium

Authors
Iijima, H Asonuma, T Hirose, T Irako, M Kumita, T Kajita, M Matsuzawa, K Wada, K
Citation
H. Iijima et al., Laser cooling system of ortho-positronium, NUCL INST A, 455(1), 2000, pp. 104-108
Citations number
7
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
455
Issue
1
Year of publication
2000
Pages
104 - 108
Database
ISI
SICI code
0168-9002(20001121)455:1<104:LCSOO>2.0.ZU;2-E
Abstract
We have studied laser cooling (Doppler cooling) of ortho-positronium to ach ieve Bose-Einstein condensation of positronium atoms. We have been developi ng a long-pulse laser with the wavelength of 243 nm, a bunched slow positro n beam to realize the proposed experiment and a Monte Carlo simulation prog ram for theoretical understanding. The Monte Carlo analysis clarified that we were able to obtain 7% of ortho-positronium atoms which were cooled down to1 K and confined within a small volume without using a trap system. (C) 2000 Elsevier Science B.V. All rights reserved.