Abstract
An apparatus is developed which prepares clusters by means of arc-discharge-heated expanding plasma jet, and as a test of the apparatus carbon clusters are prepared from the carbon cathode, which is heated and vaporized by arc discharge. Vaporized carbon atoms and helium plasma are ejected from a higher pressure discharge chamber into a lower pressure vessel through a tiny nozzle with plasma. After the carbon atoms get into the lower pressure vessel, they are cooled and clustered. It is expected that the size and shape of clusters can be controlled by changing the pressure ratio across the nozzle. It is confirmed that the apparatus can run without plugging the nozzle. The pressure region in which it runs stably is also investigated. Experiments are made with a view to preparing C60 ('Buckminsterfullerene'), which looks like a soccer ball and is considered an important material with various applications.
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