Ion-beam-assisted deposition of thin films

Martin, Philip; Macleod, H. A.; Netterfield, R. P.; Pacey, C. G.; Sainty, Wayne G.

doi:10.1364/ao.22.000178

Cited by 285 publications

(54 citation statements)

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“…It is known that the response time of dielectric films are dependent on their morphology and porosity [3,4]. The ZrO 2 WG was evaporated by EB-PVD and is more porous than the Dralo WG, which was evaporated by IBAD [25]. According to [4] and [7], the increase in porosity amounts to decreasing the response time, which is in agreement with our findings.…”

Section: Resultssupporting

confidence: 91%

“…Therefore, IBAD films are more compact, and this reduced porosity makes them less sensitive to moisture. These facts were corroborated by structural and textural characterization, including SEM micrographs [25]. However, this difference can be circumvented by changing the position of the CCD, as described earlier, such that the response of the WG sensor does not depend significantly on the dielectric material.…”

Section: Methodsmentioning

confidence: 58%

“…This is only true because the CCD is farther from the coupler when the WG is made with Dralo, which was evaporated with the IBAD technique. In fact, as demonstrated by Martin et al [25], the packing densities of SiO 2 , TiO 2 , and ZrO 2 films increase substantially when they are produced under ion bombardment, as measured by the reduction in the adsorption of moisture when the films are exposed to a humid atmosphere. In a ZrO 2 -SiO 2 multilayer interference filter, changes in the wavelength of the peak transmittance on exposure to the atmosphere have been reduced by a factor of eight for IBAD films when compared to the conventional EB-PVD process.…”

Section: Methodsmentioning

confidence: 86%

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High-sensitivity optical humidity sensor based on a thin dielectric waveguide

Ribeiro¹,

Domenegueti²,

Zílio³

2013

Appl. Opt.

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A low-cost, high-sensitivity humidity sensor based on a low-loss dielectric thin film waveguide (WG) is presented. The guided mode is produced by coupling laser light into the film by optical tunneling through a solid gap deposited on the base of a semi-cylindrical lens. The light reflected from this optical system carries information about the refractive index of the medium neighboring the WG, and is detected by a low-cost CCD linear sensor and analyzed with a microcontroller or personal computer. The technique presents good sensitivity to relative humidity (RH) changes, especially below 10% RH, linear behavior between 20% and 80% RH, and a response time of a few seconds.

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Section: Resultssupporting

confidence: 91%

Section: Methodsmentioning

confidence: 58%

Section: Methodsmentioning

confidence: 86%

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High-sensitivity optical humidity sensor based on a thin dielectric waveguide

Ribeiro¹,

Domenegueti²,

Zílio³

2013

Appl. Opt.

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“…Each of the fo ur organisms was found to have its own unique group of compounds that could serve either individually or in combination as sources of carbon and energy for growth . When the peptone in the medium was replaced by another appropriate source of carbon and energy, the difference in the capacities of the organisms examined to grow at low nutrient concentration disappeared, and all four organisms could be described as oligotrophic (32). We concluded that the methods being used to distinguish oligotrophic and eutrophic bacteria were not in fact doing so.…”

Section: Other Studiesmentioning

confidence: 92%

Marine Microbiology Far From the Sea

MacLeod¹

1985

Annual Review of Microbiology

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“…SuperPower is using nontextured metal substrates and obtain a bi-axial textured buffer layer by Ion Beam Assisted Deposition (IBAD) (34) followed by Metal Organic Chemical Vapor Deposition (MOCVD) of the YBCO layer (2).…”

Section: Hts Conductorsmentioning

confidence: 99%

Superconducting wind turbine generators

Abrahamsen¹,

Mijatović

Seiler³

et al. 2010

Supercond. Sci. Technol.

197

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We have examined the potential of 10 MW superconducting direct drive generators to enter the European offshore wind power market and estimated that the production of about 1200 superconducting turbines until 2030 would correspond to 10% of the EU offshore market. The expected properties of future offshore turbines of 8 and 10 MW have been determined from an up-scaling of an existing 5 MW turbine and the necessary properties of the superconducting drive train are discussed. We have found that the absence of the gear box is the main benefit and the reduced weight and size is secondary. However, the main challenge of the superconducting direct drive technology is to prove that the reliability is superior to the alternative drive trains based on gearboxes or permanent magnets. A strategy of successive testing of superconducting direct drive trains in real wind turbines of 10 kW, 100 kW, 1 MW and 10 MW is suggested to secure the accumulation of reliability experience. Finally, the quantities of high temperature superconducting tape needed for a 10 kW and an extreme high field 10 MW generator are found to be 7.5 km and 1500 km, respectively. A more realistic estimate is 200–300 km of tape per 10 MW generator and it is concluded that the present production capacity of coated conductors must be increased by a factor of 36 by 2020, resulting in a ten times lower price of the tape in order to reach a realistic price level for the superconducting drive train.

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Ion-beam-assisted deposition of thin films

Cited by 285 publications

References 0 publications

High-sensitivity optical humidity sensor based on a thin dielectric waveguide

High-sensitivity optical humidity sensor based on a thin dielectric waveguide

Marine Microbiology Far From the Sea

Superconducting wind turbine generators

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