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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Study of the effect of NbN on microwave Niobium cavities for gravitational wave detectors

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Autor(es):
Liccardo, V. [1] ; Franca, E. K. [2] ; Aguiar, O. D. [2] ; Oliveira, R. M. [2] ; Ribeiro, K. L. [3] ; Silva, M. M. N. F. [2]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] ITA, Sao Jose Dos Campos, SP - Brazil
[2] INPE, Sao Jose Dos Campos, SP - Brazil
[3] Univ Fed Reconcavo Bahia, Cruz Das Almas, BA - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Journal of Instrumentation; v. 11, JUL 2016.
Citações Web of Science: 0
Resumo

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). (AU)

Processo FAPESP: 13/17696-8 - Tratamento de metais e ligas especiais de uso no setor aeroespacial via implantação iônica por imersão em plasma em alta temperatura
Beneficiário:Rogério de Moraes Oliveira
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 13/26258-4 - Matéria superdensa no universo
Beneficiário:Manuel Máximo Bastos Malheiro de Oliveira
Linha de fomento: Auxílio à Pesquisa - Temático