@Article{PaulaAguiOliv:2013:ReCoA,
               author = "Paula, L. A. N. de and Aguiar, Odylio Denys de and Oliveira Jr., 
                         N. F.",
          affiliation = "Jr., Univ Sao Paulo, Dept Mech \& Mat Phys, Sao Paulo, Brazil. 
                         and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Remote coupling between a probe and a superconducting klystron 
                         cavity for use in gravitational wave detectors",
              journal = "Journal of Instrumentation",
                 year = "2013",
               volume = "8",
                month = "Aug.",
             keywords = "microwave antennas, resonant detectors, instrument optimisation, 
                         simulation methods and programs.",
             abstract = "In this work the main task was to measure the remote coupling 
                         between a probe and some niobium superconducting reentrant 
                         cavities for use in parametric transducers of gravitational wave 
                         detectors. The cavities were manufactured from RRR300 niobium and 
                         cryogenically tested to determine the electromagnetic coupling 
                         among other parameters. These cavities were also closed using a 
                         RRR300 niobium cover forming a narrow axial gap with the post top. 
                         A hole was made at the base opposite the cover in order to the 
                         probe reach the cavity. Generally, the critical coupling (beta 
                         approximate to 1) is achieved with the probe inside the cavity. 
                         The mechanical connection of the probe with the transducer and the 
                         external circuit introduces an unwanted seismic noise in the 
                         transducer. The microstrip antennas have been traditionally 
                         employed to make a wireless connection. However, this study has 
                         demonstrated coupling factor beta approximate to 1 with the probe 
                         moved away 4.0 mm from the cavity with a 3.0 mm diameter hole. 
                         Couplings with the probe moved away 1.0 mm and 7.0 mm from 
                         cavities with 1.5 mm and 3.5 mm diameter holes, respectively, have 
                         also been obtained. These results have revealed the influence of 
                         the hole diameter with the remote coupling between an electric 
                         field probe and the klystron mode of a superconducting reentrant 
                         cavity. Due to the practicalities, this effect may replace the 
                         microstrip antennas making it possible to implement high 
                         sensitivity parametric transducers.",
                  doi = "10.1088/1748-0221/8/08/P08009",
                  url = "http://dx.doi.org/10.1088/1748-0221/8/08/P08009",
                 issn = "1748-0221",
                label = "isi 2013-11",
             language = "en",
        urlaccessdate = "12 maio 2024"
}