Space low earth orbit environment simulator for ground testing materials and devices

Yeritsyan, Hrant N.; Sahakyan, Aram A.; Grigoryan, N. E.; Harutyunyan, V. V.; Arzumanyan, Vika V.; Tsakanov, V.; Grigoryan, Bagrat; Davtyan, Hakob; Dekhtiarov, V.S.; Rhodes, Christopher J.; Assovsky, Igor G.

doi:10.1016/j.actaastro.2021.01.030

Cited by 2 publications

(1 citation statement)

References 22 publications

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“…During the operation of a spacecraft in orbit, it will be affected by many environmental factors, such as micro debris (MD), atomic oxygen (AO), ultraviolet, charged particles, high vacuum and so on [1][2][3]. The data of material performance degradation in single factor ground simulation test is often inconsistent with the data of space in orbit test, so the synergistic effect caused by various environmental factors has gradually attracted attention [4,5].…”

Section: Introductionmentioning

confidence: 99%

Asynchronous Synergistic Damage Effect of Atomic Oxygen and Space Micro Debris on Kapton Film

Tong

Wei

et al. 2022

Coatings

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In the low earth orbit environment, many environmental factors lead to the degradation of material properties. The synergistic effect of long-term atomic oxygen (AO) irradiation and instantaneous impact of micro debris (MD) on long-term and transient space environmental factors has attracted more and more attention. In this paper, the performance evolution of Kapton films under the conditions of MD, AO single factor load spectrum and MD + AO, AO + MD asynchronous synergistic load spectrum were studied by laser driven flyer and microwave atomic oxygen technology. The macro morphology, optical properties and quality changes of Kapton films before and after each load spectrum were compared, and the mechanism of micro morphology and structure changes was explored. The results show that compared with MD + AO loading spectrum, the surface holes of Kapton films are larger under AO + MD load spectrum condition, the residual aluminum particles formed by reverse sputtering of Al particles during impact are less, the average transmittance of the film decreases slightly, and the weight loss of Kapton film is slightly more under the same atomic oxygen exposure time. Under the condition of MD + AO load spectrum, plastic tearing cracks, craters and holes are formed on the surface of Kapton film; the edge of the hole formed under the condition of AO + MD load spectrum is straight, without obvious depression and tear characteristics. Under the condition of MD + AO load spectrum, due to the adhesion of Al after the impact of micro debris, the subsequent atomic oxygen erosion of the film is reduced, so the C-C bond is not seriously damaged, and a considerable part of the residual aluminum flyer is oxidized to alumina by atomic oxygen; The AO + MD loading spectrum test makes the film first eroded by atomic oxygen, resulting in the reduction in C–O bond and C–C bond. The fracture of C–N bond is caused by the hypervelocity impact of micro debris. Hypervelocity impact leads to the thermal decomposition of the material, destroys the C–N bond in the imide ring and generates an N–H bond. This study will provide a method reference and a reference for the multi-factor ground collaborative simulation of space environment of spacecraft materials.

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Section: Introductionmentioning

confidence: 99%

Asynchronous Synergistic Damage Effect of Atomic Oxygen and Space Micro Debris on Kapton Film

Tong

Wei

et al. 2022

Coatings

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Nodular-defect induced degradation of laser damage resistance of 532 nm high reflectivity coating after exposure to gamma rays

Peng,

Xia,

Xia

et al. 2024

Opt. Express

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The coupling effect of gamma-ray radiation and 532 nm nanosecond laser radiation on optical coatings and substrates was investigated. Fused silica and S-BSL7 glass with 532 nm high reflectivity (HR) coatings were irradiated using 60Co gamma-ray source at a dose rate of 1 Gy/s for a total dose of 1–500 kGy. After irradiation, the samples were subjected to raster scan testing using a laser with a pulse width of approximately 8.6 nanosecond and wavelength of 532 nm to measure their laser-induced damage threshold (LIDT). The results showed that S-BSL7 glass was significantly darkened after gamma-ray irradiation, whereas fused silica did not change color, but E’ color centers appeared at a dose of 500 kGy. All the coated samples maintained a high level of reflectivity. No significant changes are observed in the material structures of the samples. However, the LIDT of the high reflectivity film decreased significantly after 500 kGy irradiation, whereas the LIDT of all other samples showed no obvious degradation. Scanning electron microscopy of the damage pit cross-sections revealed that all the damage was initiated by nodular defects, suggesting that gamma rays affected the nodular structure. We used Monte Carlo simulations to compare the energy deposition and electron excitation conditions of the film with a nodular structure and an intact multilayer structure under gamma-ray irradiation. We found that the nodular structure slightly enhanced the effect of gamma rays on the film. Considering the small size of the nodules, this small enhancement was only apparent under high-dose gamma-ray irradiation. In general, we confirmed that gamma-ray irradiation influenced the LIDT of the 532 nm HR coating through nodular defects other than the coating stack.

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Space low earth orbit environment simulator for ground testing materials and devices

Cited by 2 publications

References 22 publications

Asynchronous Synergistic Damage Effect of Atomic Oxygen and Space Micro Debris on Kapton Film

Asynchronous Synergistic Damage Effect of Atomic Oxygen and Space Micro Debris on Kapton Film

Nodular-defect induced degradation of laser damage resistance of 532 nm high reflectivity coating after exposure to gamma rays

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