Effects of helium ion bombardment on metallic gold and iridium thin films

Zuccon, Sara; Napolitani, E.; Tessarolo, Enrico; Zuppella, Paola; Corso, Alain Jody; Gerlin, Francesca; Nardello, Matteo; Pelizzo, Maria Guglielmina

doi:10.1364/ome.5.000176

Cited by 36 publications

(15 citation statements)

References 19 publications

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“…Depending on energy, ions are expected to implant at different depth in the materials, potentially causing serious damages in the lightsail. A collection of experiments carried out on virgin and protected mirrors have been reported [36,37,38,39,40,41,42], even though much work still needs to be done to model and prove lightsail hardness.…”

Section: Discussion and Fabrication Challengesmentioning

confidence: 99%

Directed Energy Accelerated Lightsails

Santi¹,

Favaro²,

Corso³

et al. 2021

Preprint

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A lightsail accelerated via directed energy is a candidate technology to send a probe into the deep space in a time period compatible with human life. The light emitted by a ground-based large-aperture phased laser array is directed onto the lightsail to produce a thrust by transferring the momentum of the incident photons. To achieve high efficiency propulsion, the lightsail must be characterized by extremely low mass, high reflectance and minimal absorption in the Doppler-shifted laser wavelength range, while high emissivity in the infrared is required for thermal management. Optimized multilayer structures allow ultralight spacecraft being accelerated by laser radiation pressure up to 20% of the light velocity, and eventually even above, as long as a compromise between efficiency and weight is achieved. Key aspect is the ability to survive to the temperature increase during the acceleration phase, which can be fateful for the system.

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Section: Discussion and Fabrication Challengesmentioning

confidence: 99%

Directed Energy Accelerated Lightsails

Santi¹,

Favaro²,

Corso³

et al. 2021

Preprint

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show abstract

“…Gillette and Kenyon [107] A similar behavior was observed with He ions. Low energy He ion irradiations on metallic thin films of Au and Cu demonstrate that with fluences of the order of 10 15 -10 16 ion/cm 2 , a faint dislocation band starts forming, with preservation of the optical performance in the visible spectral range and a fluence-proportional degradation in the ultraviolet [110]. Fluences of the order of 10 17 ions/cm 2 induce a large formation of bubbles inside the films and a deep transformation of the surface morphology [111] [112] with a consequent degradation of the visible and UV reflectance.…”

Section: Charged Particlesmentioning

confidence: 99%

Mirrors for Space Telescopes: Degradation Issues

Garoli¹,

Marcos²,

Larruquert³

et al. 2020

Preprint

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Mirrors are a subset of optical components essential for the success of current and future space missions. Most of the telescopes for space programs ranging from Earth Observation to Astrophysics and covering the whole electromagnetic spectrum from X-rays to Far-Infrared are based on reflective optics. Mirrors operate in diverse and harsh environments that range from Low-Earth Orbit, to interplanetary orbits and the deep space. The operational life of space observatories spans from minutes (sounding rockets) to decades (large observatories), and the performance of the mirrors within the mission lifetime is susceptible to degrade, which results in a drop of the instrument throughput, which in turn affects the scientific return. Therefore, the knowledge of potential degradation mechanisms, how they affect mirror performance, and how to prevent them is of paramount importance to ensure the long-term success of space telescopes. In this review we report an overview on current mirror technology for space missions with a focus on the importance of degradation and radiation resistance of the coating materials. A special attention will be given to degradation effects on mirrors for the far and extreme UV as in these ranges the degradation is enhanced by the strong absorption of most contaminants.

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“…Harsh environmental agents can drastically affect the performance of the components, leading a change of the overall optical behavior of a space instrument; for this reason many efforts have been made over the years to study these degradation effects. [125][126][127][128] In particular, the stability in harsh operational environment becomes more critical for the instruments onboard of Solar Orbiter mission because they will operate very close to the Sun. 1 In this environment, the instruments undergo a constant bombardment of particles at different energies coming from different sources.…”

Section: Stability To Accelerated Ions Implantationmentioning

confidence: 99%

Extreme Ultraviolet Multilayer Nanostructures and Their Application to Solar Plasma Observations: A Review

Corso

Pelizzo

2019

j nanosci nanotechnol

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The advent of nanoscale multilayer (ML) technology has led to great breakthroughs in many scientific and technological fields such as nano-manufacturing, bio-imaging, atto-physics, matter physics and solar physics. ML nanostructures are an enabling technology for the development of mirrors and reflective gratings having high efficiency at normal incidence in the extreme ultraviolet (EUV) range, a spectral region where conventional coatings show a negligible reflectance. In solar physics, ML mirrors have proved to be key elements for both imaging and spectroscopy space instruments, as they allow to make observations of EUV solar plasma emissions with spatial and spectral resolutions never reached before. ML-based instruments have been used in many of the major solar satellites and have flown in numerous sounding rocket experiments; moreover, in the last two decades many studies were performed in order to develop ML structures with increasingly better performance for future solar missions. In this paper, a review of the most promising ML nanostructures developed so far and applied to the observation of solar plasma emission lines is presented. After a brief recall of ML theory, a detailed discussion of the most promising material pairs and layer stack structures proposed and applied to past and current space missions will be presented; in particular, the review will focus on the ML structures having high efficiency in the 6 nm-35 nm wavelength range. Finally, the ML stability to low energy ion bombardment will be discussed.

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Effects of helium ion bombardment on metallic gold and iridium thin films

Cited by 36 publications

References 19 publications

Directed Energy Accelerated Lightsails

Directed Energy Accelerated Lightsails

Mirrors for Space Telescopes: Degradation Issues

Extreme Ultraviolet Multilayer Nanostructures and Their Application to Solar Plasma Observations: A Review

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