Optical and Electrical Diagnostics for the Investigation of Edge Turbulence in Fusion Plasmas (Manufatti, prototipi d'arte e relativi progetti)

Type
Label
  • Optical and Electrical Diagnostics for the Investigation of Edge Turbulence in Fusion Plasmas (Manufatti, prototipi d'arte e relativi progetti) (literal)
Anno
  • 2003-01-01T00:00:00+01:00 (literal)
Alternative label
  • R. Cavazzana 4, P. Scarin 1, G. Serianni 1 (2003)
    Optical and Electrical Diagnostics for the Investigation of Edge Turbulence in Fusion Plasmas
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • R. Cavazzana 4, P. Scarin 1, G. Serianni 1 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • This research product has been obtained by Consorzio RFX, working on the European Fusion Programme. RFX, operats in Padova since 1992, is the most important RFP machine in the world. Measurements of local fluctuations of relevant plasma parameters (density, temperature, electrostatic potential) are one of the most important areas for the development of new diagnostic systems. Measurements made with adequate spatial and temporal resolution give physical insight into the properties of fluctuations and the nature of the driving instabilities, and statistical analysis of these data can be used to compare experimental findings with theoretical models and numerical simulations . In order to study electrostatic fluctuations of edge turbulence on large Reversed Field Pinch devices at high plasma current (up to 2 MA), a new Gas Puffing Imaging diagnostic (GPI) has been developed for both RFX (Padova, Italy) and TPE (Tsukuba, Japan) Reverse Field Pinch (RFP) experiments. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • Università di Padova, CNR ed ENEA hanno costituito il Consorzio RFX per realizzare congiuntamente attività di ricerca sulla fusione nucleare controllata. Il personale resta dipendente dal proprio ente, precisato nel campo (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1 CNR, 2 UniPD, 3 ENEA, 4 Consorzio RFX (dipendenti) (i dipendenti di 1-2-3 sono anche affiliati al Consorzio) (literal)
Titolo
  • Optical and Electrical Diagnostics for the Investigation of Edge Turbulence in Fusion Plasmas (literal)
Descrizione sintetica
  • The new, 2D and fast diagnostic system has been developed for studying the dynamic structure of plasma turbulence; it will be used in the edge of the RFP (reversed-field pinch) toroidal devices. The system consists of a gas-puffing nozzle, 32 optical channels measuring H¥á emitted from the puffed gas (to study the optical emissivity of turbulent patterns and to analyse structures in two dimensions) and an array of Langmuir probes (to compare the turbulent pattern with the optical method and to measure the local plasma parameters). The diagnostic arrangement covers the observation region of about 8 cm along the toroidal direction and 4 cm in the radial one, by means of three optical fans directed at 38¢ª to each other. The central fan consists of 16 lines directed along the radial direction, while the lateral two have 8 lines each and reach the observation area through two mirrors mounted inside the access pipe. In the focal region the spacing between adjacent lines of sight is 5 mm and the beams have a diameter between 3 to 4 mm. The light is collected by the optics at the port window and sent through optical fibers to two detectors, each equipped with an interference filter for the H¥á line and a 16 channel photomultiplier array. The Hydrogen gas is filled in a reservoir at a pressure of 1 to 2 bars and the flux is regulated by a piezo electric valve. (literal)
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