@Article{LiccardoFrAgOlRiSi:2016:StEfNb,
               author = "Liccardo, V. and Fran{\c{c}}a, Enrique Klai de and Aguiar, Odylio 
                         Denys de and Oliveira, R. M. and Ribeiro, K. L. and Silva, Matheus 
                         Moraes Novaes Ferreira da",
          affiliation = "{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Universidade Federal do 
                         Rec{\^o}ncavo da Bahia (UFRB)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Study of the effect of NbN on microwave Niobium cavities for 
                         gravitational wave detectors",
              journal = "Journal of Instrumentation",
                 year = "2016",
               volume = "11",
                pages = "P07004",
                month = "July",
             keywords = "Antennas, Cryogenics, Instrument optimisation, Resonant 
                         Detectors.",
             abstract = "Superconducting reentrant cavities may be used in parametric 
                         transducers for resonant-mass gravitational wave detectors. When 
                         coupled to a spherical resonant antenna, transducers will monitor 
                         its mechanical quadrupolar modes, working as a mass-spring system. 
                         In this paper we will investigate the effect of the Niobium 
                         Nitride (NbN), produced through plasma immersion ion implantation 
                         (PIII), on the quality factor of reentrant Niobium (Nb) cavities. 
                         With the PIII surface treatment unloaded electrical Q-factors 
                         (Q(0)) of the order of 10(5) were obtained in cryogenic 
                         conditions. These results indicated a significant increase in the 
                         effect of superconductivity after the cavity surfaces have been 
                         heavily attacked by a concentrated acid mixture and after 
                         suffering successive PIII processes. Q0's similar to 3.0 x 105 at 
                         4.2 K are expected to be obtained using Nb RRR399 with a suitable 
                         surface treatment. These cavities, with high Q(0), are already 
                         installed and being tested in the Gravitational Wave Detector 
                         Mario Schenberg. The experimental tests have been carried out at 
                         the laboratories of the National Institute for Space Research 
                         (INPE).",
                  doi = "10.1088/1748-0221/11/07/P07004",
                  url = "http://dx.doi.org/10.1088/1748-0221/11/07/P07004",
                 issn = "1748-0221",
             language = "en",
        urlaccessdate = "27 abr. 2024"
}