{"title":"Experiments with the CNPM gas gun for minimizing piston wear and propellant gas flow","authors":"A. Reggiori, R. Carlevaro, G. Riva, G. Daminelli","doi":"10.1109/FUSION.1993.518275","DOIUrl":null,"url":null,"abstract":"Among the different methods of pellet injection for Tokamak refueling, the two-stage gun is presently the most suitable for pellet speeds over 2000 m/s, but for continuous operation two main problems are to be solved: wear of the pistons and plasma contamination by the propulsion gas. An experimental program is under way with the CNPM two-stage gas gun aimed at the solution of these problems. Different piston geometries and materials have been tested. Moreover, a fast valve has been installed at the exit of the launch barrel, in order to minimize the propellant gas flow. Results of the tests are presented.","PeriodicalId":365814,"journal":{"name":"15th IEEE/NPSS Symposium. Fusion Engineering","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"15th IEEE/NPSS Symposium. Fusion Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/FUSION.1993.518275","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
Among the different methods of pellet injection for Tokamak refueling, the two-stage gun is presently the most suitable for pellet speeds over 2000 m/s, but for continuous operation two main problems are to be solved: wear of the pistons and plasma contamination by the propulsion gas. An experimental program is under way with the CNPM two-stage gas gun aimed at the solution of these problems. Different piston geometries and materials have been tested. Moreover, a fast valve has been installed at the exit of the launch barrel, in order to minimize the propellant gas flow. Results of the tests are presented.