| 摘要 |
<p>Method and apparatus for forming coherent clusters. The apparatus comprises a chamber (14) from which helium gas is expanded through a nozzle (16) to a vacuum chamber (25). A beam (31) of electrons from a source (29) is directed to impinge on the resultant helium ions as they emerge from the nozzle, to form a cluster beam (27) which is collimated by skimmers (20). By cluster is meant an assembly of one or more atoms or molecules assembled together. The clusters are rendered coherent by a process of induced scattering.</p> |
