New millimeter-wave access for JET reflectometry and ECE (Articolo in rivista)

Type
Label
  • New millimeter-wave access for JET reflectometry and ECE (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.fusengdes.2005.06.312 (literal)
Alternative label
  • Cupido L., De La Luna E., Antonucci C., Guigon A., van Amerongen F.J., Bongers W.A., Donnè A.J.H., Graswinckel M.F., Bruschi A., Cirant S., Simonetto A., Sozzi C., Wagner D., Manso E., Meneses L., Silva F., Varela P., Balshaw N., Chareau J.M., Conway G., Fessey J., Hanks S., Pearce R., Ricardo V., Sands D., Starky D., Tisconia T. (2005)
    New millimeter-wave access for JET reflectometry and ECE
    in Fusion engineering and design
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Cupido L., De La Luna E., Antonucci C., Guigon A., van Amerongen F.J., Bongers W.A., Donnè A.J.H., Graswinckel M.F., Bruschi A., Cirant S., Simonetto A., Sozzi C., Wagner D., Manso E., Meneses L., Silva F., Varela P., Balshaw N., Chareau J.M., Conway G., Fessey J., Hanks S., Pearce R., Ricardo V., Sands D., Starky D., Tisconia T. (literal)
Pagina inizio
  • 707 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 74 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. UTL, IST, Ctr Fusao Nucl, Inst Super Tecn,EURATOM, P-1049001 Lisbon, Portugal 2. EURATOM, CIEMAT, Lab Nacl Fus, E-28040 Madrid, Spain 3. EURATOM, Close Support Unit, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England 4. FOM, Inst Plasma Phys Rijnhuizen, NL-3430 BE Nieuwegein, Netherlands 5. EURATOM, ENEA, CNR, IFP, I-20125 Milan, Italy 6. EURATOM, IPP, Max Planck Inst Plasmaphys, D-85748 Garching, Germany 7. UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England (literal)
Titolo
  • New millimeter-wave access for JET reflectometry and ECE (literal)
Abstract
  • Millimeter-wave diagnostics at JET, mainly reflectometry, are employing state of art electronics, but are limited in performance by the existing waveguides and antenna system that are inadequate and obsolete. The use of long run waveguides with high losses and non-optimized antennas (in some cases, not pointing to relevant plasma positions) lead to difficult measurement conditions for reflectometry. The new access system presented in this article has been designed to improve the performance of reflectometry measurements and enable the installation of antennas for oblique viewing ECE. These two new antennae will allow the ECE radiation to be collected at different angles with respect to the magnetic field. This set-up, known as oblique ECE [1], is expected to be extremely useful in improving the interpretation of ECE temperature measurements in all fusion experiments with significant additional heating. For reflectometry, there is an urgent need to improve the edge density measurements as both the lithium beam and Thomson scattering exhibit limitations of resolution at lower densities. The project proposal states that the expected improvement in reflectometry S/N ratio is 30 dB. If realized, this will allow broad band reflectometry, for the measurement of the electron density profile, for the first time in JET. (literal)
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