Monte-Carlo simulation of complex vapor-transport systems for RIB applications

✍ Scribed by Y. Zhang; G.D. Alton

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 223 KB
• Volume: 241
• Category: Article
• ISSN: 0168-583X
• DOI: 10.1016/j.nimb.2005.07.154

✦ Synopsis

In order to minimize decay losses of short-lived radioactive species at ISOL based RIB facilities, effusive-flow particle transit times between target and ion source must be as short as practically achievable. A Monte-Carlo code has been developed for simulating the effusive-flow of neutral particles through vapor-transport systems independent of materials of construction. The code provides average distance traveled and time information associated with the transit of individual particles through a system. It offers a cost effective and accurate means for arriving at vapor-transport system designs. In this report, the code will be described and results obtained by its use in evaluating several prototype vapor-transport systems using specular reflection, cosine and isotropic particle re-emission about the normal to the surface models following adsorption. Simulation results obtained with an isotropic distribution are in close agreement with experimental measurements of the properties of prototype vapor-transport systems fabricated at the Holifield Radioactive Ion Beam Facility.