{"title":"Measurements and calculations of isotopic exchange between deuterium and tritium and their implications to neutral beam injection","authors":"D. Ćirić, A. Bickley, H. D. de Esch, H. Falter","doi":"10.1109/SFE.1993.472792","DOIUrl":"https://doi.org/10.1109/SFE.1993.472792","url":null,"abstract":"The hydrogen isotope exchange in some beamline components of a tritium injector is analysed using the local mixing model. Various implantation and cleanup scenarios using tritium, deuterium and hydrogen beams are discussed. The model is also used to interpret D(t,n)/spl alpha/. Neutron measurements during the cleanup of beamline elements after the First Tritium Experiment at JET.","PeriodicalId":387034,"journal":{"name":"15th IEEE/NPSS Symposium on Fusion Engineering - Supplement,","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121640301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Lasser, F. Botter, J. Hemmerich, M. Laveyry, J. Lupo, P. Milverton, R. Stagg, S. Tistchenko, K. Walker, J. Yorkshades
{"title":"Protium-deuterium separation with the preparative gas chromatographic system at JET","authors":"R. Lasser, F. Botter, J. Hemmerich, M. Laveyry, J. Lupo, P. Milverton, R. Stagg, S. Tistchenko, K. Walker, J. Yorkshades","doi":"10.1109/SFE.1993.472788","DOIUrl":"https://doi.org/10.1109/SFE.1993.472788","url":null,"abstract":"The design of the preparative gas chromatographic (GC) hydrogen isotope separation system at JET, the process of displacement chromatography and the results of the commissioning phase with inactive gas mixtures of protium and deuterium are presented. The GC system meets fully the specifications for isotope separation. Protium and deuterium concentrations in the Pd filled column can be calculated by means of a simple program which simulates the gas chromatographic process.","PeriodicalId":387034,"journal":{"name":"15th IEEE/NPSS Symposium on Fusion Engineering - Supplement,","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133361022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Hemmerich, A. Bell, P. Boucquey, C. Caldwell-Nichols, P. Chuilon, F. Delvart, B. Grieveson, R. Haange, G. Jones, R. Lasser, M. Laveyry, J. Lupo, J. Mart, P. Milverton, J. Salanave, L. Serio, N. Skinner, R. Stagg, K. Walker, J. Yorkshades, A. Konstantellos, E. Kussel
{"title":"Installation and inactive commissioning of the JET active gas handling system (AGHS)","authors":"J. Hemmerich, A. Bell, P. Boucquey, C. Caldwell-Nichols, P. Chuilon, F. Delvart, B. Grieveson, R. Haange, G. Jones, R. Lasser, M. Laveyry, J. Lupo, J. Mart, P. Milverton, J. Salanave, L. Serio, N. Skinner, R. Stagg, K. Walker, J. Yorkshades, A. Konstantellos, E. Kussel","doi":"10.1109/SFE.1993.472789","DOIUrl":"https://doi.org/10.1109/SFE.1993.472789","url":null,"abstract":"The installation of all AGHS subsystems in compliance with a strict Quality Assurance Programme was completed in 1993. Installation was followed by end-to-end commissioning of signal and control loop connections to the Distributed Control System. Plant layout and function are described and results of process tests with hydrogen, deuterium and other test gases are presented. These tests have revealed some minor deficiencies on the subsystems for Cryogenic Distillation, Exhaust Detritiation and Impurity Processing which have been or are in the process of being resolved prior to commissioning with tritium, initially 3g of T/sub 2/, due to start in 1994.","PeriodicalId":387034,"journal":{"name":"15th IEEE/NPSS Symposium on Fusion Engineering - Supplement,","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115681501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Campostrini, G. Manduchi, N. Pomaro, C. Taliercio
{"title":"Flexible control of the electromagnetic diagnostic system in RFX","authors":"P. Campostrini, G. Manduchi, N. Pomaro, C. Taliercio","doi":"10.1109/SFE.1993.472793","DOIUrl":"https://doi.org/10.1109/SFE.1993.472793","url":null,"abstract":"The Electromagnetic Diagnostic of the RFX experiment is based on 508 magnetic probes, consisting of coils placed along the torus outside the vacuum vessel. In order to reduce the huge amount of data, without losing useful information, a flexible system for the selection of the signals to be acquired has been designed and implemented. The remote control of the amplification gain and the calibration of each conditioning chain are possible as well. The control system is based on a user-friendly X Window interface specifically developed, as part of the RFX Data Acquisition and Analysis System.","PeriodicalId":387034,"journal":{"name":"15th IEEE/NPSS Symposium on Fusion Engineering - Supplement,","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124891979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Altmann, E.B. Deksnis, C. Ibbott, C. Sborchia, R. Tivey, R. Viola
{"title":"An analysis of induction brazed beryllium on copper alloy substrates [JET divertor]","authors":"H. Altmann, E.B. Deksnis, C. Ibbott, C. Sborchia, R. Tivey, R. Viola","doi":"10.1109/SFE.1993.472797","DOIUrl":"https://doi.org/10.1109/SFE.1993.472797","url":null,"abstract":"A long pulse JET divertor requires the production of beryllium clad copper alloy hypervapotron target plates. Vacuum brazing of beryllium poses a number of problems relating to the stable beryllium oxide and ready formation of brittle intermetallics. Induction brazing offers some advantages and a rig has been developed for producing vapotron test target plates for power load testing in the Neutral Beam Test Bed. The brazed components have survived over 1000 shots at 13 MW/m/sup 2/ with an ultimate power loading capability up to 17 MW/m/sup 2/. These results have been interpreted with respect to both localised stresses and thermal fatigue at the interface. This study analyses the power handling capability with respect to instantaneous heat flux failure, localised hot spots from target plate deflections and high cycle fatigue with a view to establishing an optimum unit size.","PeriodicalId":387034,"journal":{"name":"15th IEEE/NPSS Symposium on Fusion Engineering - Supplement,","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132160293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Analysis and specification of the performances of the new JET amplifier for the vertical stabilisation","authors":"T. Bonicelli, M. Garribba, P. Mondino, P. Noll","doi":"10.1109/SFE.1993.472795","DOIUrl":"https://doi.org/10.1109/SFE.1993.472795","url":null,"abstract":"A new 25 MW power amplifier based on GTO invertors has been procured to cope with configurations of the JET plasma characterised by high growth rates of the vertical instability. The analysis of the future JET configurations, including a new set of four divertor field coils, resulted in the specification of the required performances of the amplifier and led to the choice of the technical solution. The new amplifier has now been fully commissioned on a dummy load at the JET site.","PeriodicalId":387034,"journal":{"name":"15th IEEE/NPSS Symposium on Fusion Engineering - Supplement,","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129379632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Pick, H. Altmann, P. Andrew, G. Celentano, C. Froger, J. Graham, F. Hurd, G. Israel, P. Lomas, B. Macklin, E. Martin, R. Middleton, P. Miele, R. Mohanti, P. Noll, W. Parsons, A. Peacock, L. Rossi, C. Sborchia, S. Scott, J. Tait
{"title":"The new first wall configuration of JET","authors":"M. Pick, H. Altmann, P. Andrew, G. Celentano, C. Froger, J. Graham, F. Hurd, G. Israel, P. Lomas, B. Macklin, E. Martin, R. Middleton, P. Miele, R. Mohanti, P. Noll, W. Parsons, A. Peacock, L. Rossi, C. Sborchia, S. Scott, J. Tait","doi":"10.1109/SFE.1993.472785","DOIUrl":"https://doi.org/10.1109/SFE.1993.472785","url":null,"abstract":"The installation of the pumped divertor into the JET machine during 1992-1993 includes a total refurbishing of most of the in-vessel components and a new first wall configuration. The paper describes the new components, and the requirements which were implemented in the design. These include the requirements related to normal plasma operation and off-normal effects such as disruptions as well as those related to installation and alignment.","PeriodicalId":387034,"journal":{"name":"15th IEEE/NPSS Symposium on Fusion Engineering - Supplement,","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115767480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Brown, V. Bhatnagar, C. Gormezano, J. Jacquinot, A. Kaye, T. Wade
{"title":"High power RF testing of the JET \"A2\" FWCD antennae","authors":"T. Brown, V. Bhatnagar, C. Gormezano, J. Jacquinot, A. Kaye, T. Wade","doi":"10.1109/SFE.1993.472794","DOIUrl":"https://doi.org/10.1109/SFE.1993.472794","url":null,"abstract":"This paper describes the antenna assemblies, test bed and techniques used during the RF testing of the JET A2 antenna. The culmination of the programme was the successful testing of a prototype antenna to full performance.","PeriodicalId":387034,"journal":{"name":"15th IEEE/NPSS Symposium on Fusion Engineering - Supplement,","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130438453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"JET development towards pumped divertor operations","authors":"E. Bertolini","doi":"10.1109/SFE.1993.472796","DOIUrl":"https://doi.org/10.1109/SFE.1993.472796","url":null,"abstract":"The 1991-52 experimental campaign was completed in February 1992. The highlight of this campaign was the preliminary deuterium-tritium experiment (PTE) leading to the first ever production of controlled thermonuclear power in the megawatt range. JET then entered a major shutdown which should be completed by January 1994. The main objective of the shutdown is the installation of a divertor inside the vacuum vessel. It consists of four poloidal coils, of target plates with graphite tiles and of cryo-pumping panels. The divertor magnetic configuration has required the addition of new radio-frequency antennae, new power supplies and new divertor relevant plasma diagnostics. The aim of the divertor programme is to show active control of the impurities in thermonuclear grade plasma regimes for about ten seconds, a key issue for the construction of the International Tokamak Experimental Reactor (ITER).","PeriodicalId":387034,"journal":{"name":"15th IEEE/NPSS Symposium on Fusion Engineering - Supplement,","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123220660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Santagiustina, S. Arshad, G. Bosia, M. Browne, D. Campbell, G. D'Antona, G. Fishpool, G. Neill
{"title":"Design of the m=2, n=1 tearing mode control system for JET","authors":"A. Santagiustina, S. Arshad, G. Bosia, M. Browne, D. Campbell, G. D'Antona, G. Fishpool, G. Neill","doi":"10.1109/SFE.1993.472784","DOIUrl":"https://doi.org/10.1109/SFE.1993.472784","url":null,"abstract":"This paper describes a new control system being installed at JET, which is designed to stabilise the m=2, n=1 tearing modes by magnetic feedback. After reviewing the principles of the stabilisation, the results of the system analysis are presented. The uncertainty, complexity and variability of the plasma model suggest the use of a flexible digital controller. To obtain fast responses a processor formed by a cluster of four TMS320C40s will be used.","PeriodicalId":387034,"journal":{"name":"15th IEEE/NPSS Symposium on Fusion Engineering - Supplement,","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131523583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}