| 摘要 |
Helium clusters (13) are formed by expansion of helium gas through a nozzle (12) into a low pressure chamber (14). The clusters contain coherent helium particles. Laser light (15) is shone onto the clusters to cause the coherent helium atoms in the clusters to be accelerated by impact of the coherent light from the laser (16) thereon, so that the helium atoms form a high energy coherent beam (17). |
