@Article{OliveiraAASMFLSBS:2019:SuTrNi,
author = "Oliveira, Rog{\'e}rio de Moraes and Aguiar, Odylio Denys de and
Ara{\'u}jo, Michel Felipe Lima de Ara{\'u}jo and Silva, Matheus
Moraes Novaes Ferreira da and Mello, Carina Barros and Ferreira,
Elvis Camilo and Liccardo, Vincenzo and Savonov, Graziela da Silva
and Baba, Koumei and Souza, Renata Lopes Gon{\c{c}}alves de",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Sanno Co
Ltda} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "The surface treatment of niobium superconducting reentrant
cavities by means of high temperature nitrogen plasma based ion
implantation",
journal = "Materials Research-Ibero-american Journal of Materials",
year = "2019",
volume = "22",
number = "6",
pages = "e20190277",
keywords = "Niobium, superconducting resonant cavities, plasma ion
implantation, gravitational wave detector.",
abstract = "High Temperature Nitrogen Plasma Based Ion Implantation (HT-NPBII)
has been used to treat the surface of niobium superconducting
reentrant cavities, which are part of parametric transducers in a
resonant-mass gravitational wave detector. The aim is to enhance
the corresponding electrical quality factors (Q-factors) which are
closely related with the increase of the sensitivity of the
system. In this experiment, the cavities are immersed in plasma
and bombarded by energetic nitrogen ions, which are implanted into
the surfaces of these heated substrates. The heating temperature
of the cavities is controlled during the treatment and its level
directly affects the N implantation depth profile due to the
diffusion process. Additional tailoring of the nitrogen doping can
be performed by the adjustment of the intensity and the duty cycle
of the high negative voltage pulses used for ion implantation. For
implantations performed at 5 kV /20 \μs /300 Hz/ 700 °C,
nitrogen atoms occupy interstitial spaces in the crystal lattice
of niobium. The treatment of niobium superconducting cavities
under these parameters caused the enhancement of two orders of
magnitude of respective Q-factors. A set of characterization
techniques was performed herein in order to help with the
understanding of the underlying mechanism behind this
phenomenon.",
doi = "10.1590/1980-5373-MR-2019-0277",
url = "http://dx.doi.org/10.1590/1980-5373-MR-2019-0277",
issn = "1516-1439",
label = "lattes: 7698697775899601 1 OliveiraAASMFLBS:2019:SuTrNi",
language = "pt",
targetfile = "Oliveira_surface.pdf",
urlaccessdate = "19 abr. 2024"
}