http://www.cnr.it/ontology/cnr/individuo/prodotto/ID269724

Absorbing Coatings for high power millimeter-wave devices and matched loads (Articolo in rivista)

Type

Label

Absorbing Coatings for high power millimeter-wave devices and matched loads (Articolo in rivista) (literal)

Anno

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

Alternative label

Bin W.; Bruschi A.; Cirant S.; Muzzini V.; Simonetto A.; Spinicchia N.; Angella G.; Dell'Era F.; Gantenbein G.; Leonhardt W.; Nardone A.; Samartsev A.; Schmid M. (2013)
Absorbing Coatings for high power millimeter-wave devices and matched loads
in Fusion engineering and design; Elsevier, Amsterdam (Paesi Bassi)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Bin W.; Bruschi A.; Cirant S.; Muzzini V.; Simonetto A.; Spinicchia N.; Angella G.; Dell'Era F.; Gantenbein G.; Leonhardt W.; Nardone A.; Samartsev A.; Schmid M. (literal)

Pagina inizio

Pagina fine

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

Rivista

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

Note

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

1-3,5,6,8,11 : Istituto di Fisica Del Plasma, Consiglio Nazionale Delle Ricerche, EURATOM-ENEA/CNR Association, Milano, Italy / 4 : Istituto di Biologia Agro-ambientale e Forestale, Consiglio Nazionale Delle Ricerche, Area di Ricerca di Roma 1, Monterotondo, Rome, Italy / 7 : Istituto per l'Energetica e le Interfasi, Consiglio Nazionale Delle Ricerche, Milano, Italy / 9,10,12,13 : Institut für Hochleistungsimpuls-und Mikrowellentechnik, Karlsruhe Institute of Technology, Association EURATOM-KIT, Karlsruhe, Germany (literal)

Titolo

Absorbing Coatings for high power millimeter-wave devices and matched loads (literal)

Abstract

In the electron cyclotron frequency range the handling of high power is critical. In some cases an unpredictable amount of stray radiation can reach some components or accumulate in localized regions, with risk of damages caused by thermal overloads, and any uncontrolled reflection represents a danger for the sources. A possibility to mitigate the problem consists in covering some regions exposed to radiation with absorbers. Enhanced absorption of stray radiation lowers requirements on active protection systems in microwave diagnostics. The released heat can be extracted by dedicated cooling systems. The chromium oxide (Cr2O3), largely tested at IFP-CNR, has been routinely used as internal coating for matched loads. The performances of a variable thickness coating has been tested at high power at Karlsruhe Institute of Technology (KIT), with a 140 GHz gyrotron of the W7-X ECRH system and an averaged power density absorbed at the coating surface higher than 1 MW/m2 for 3 min. Also boron carbide (B4C) has been tested at low power and patented as a millimeter-wave absorber. In the paper, the results of some tests performed on these coatings are given, together with some simulations of the absorption capability based on low power measurements on samples. Finally, some calculations are presented for a coating obtained combining together Cr2O3 and B4C. © 2013 CNR-IFP Instituto di Fisica Plasma. (literal)

Editore