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Development of Multifunctional Thin Film Based X-Ray Intensity Filters for Space-Based Payloads

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Abstract

We report the development, thorough characterizations and space worthiness studies of multifunctional aluminized film as x-ray intensity filter for space-based payloads, suitably designed to place in Sun–Earth Lagrangian (L1) point. The L1 point is the ideal location for uninterrupted observation of Sun to study the solar flares in hard x-rays. For our specific purpose, we make use of two different types of x-ray detectors (e.g., CdTe and CZT) which are generally used for hard x-ray studies in the energy band of 5 to 200 keV. Further, these aforesaid two detectors require specified thermal control characteristic for optimal performance. Aluminization of Kapton films is proposed which would satisfy the thermo-optical and x-ray transmission requirements of the proposed payload. The developed aluminized films are thoroughly studied by field emission scanning electron microscopy and atomic force microscopy techniques for micro-structural characteristic, x-ray diffraction for phase purity, nanoindentation for mechanical integrity at micro-structural length scale and spectrophotometer for thermo-optical properties. X-ray transmission test is carried out with two radioactive sources, namely 55Fe and 241Am, with various aluminized Kapton layer combinations. Finally, space worthiness of the aluminized Kapton films is examined by accelerated environments, e.g. humidity, thermal cycling and thermo-vacuum tests.

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Authors and Affiliations

  1. U. R. Rao Satellite Centre (Formerly known as ‘ISRO Satellite Centre’), Indian Space Research Organisation, Bangalore, 560017, India

    K. Prajwal, Arjun Dey, Manju Sudhakar, Anuj Nandi, A. Carmel Mary Esther, N. Sridhara, B. Yougandar, Pradeep Kumar & A. Rajendra

  2. Department of Metallurgical and Materials Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore, 575025, India

    K. Prajwal & S. B. Arya

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  1. K. Prajwal
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  2. Arjun Dey
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  3. Manju Sudhakar
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  4. Anuj Nandi
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  5. A. Carmel Mary Esther
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  6. N. Sridhara
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  7. B. Yougandar
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  8. Pradeep Kumar
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  9. S. B. Arya
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  10. A. Rajendra
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Correspondence to Arjun Dey.

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Prajwal, K., Dey, A., Sudhakar, M. et al. Development of Multifunctional Thin Film Based X-Ray Intensity Filters for Space-Based Payloads. J. of Materi Eng and Perform 28, 5820–5831 (2019). https://doi.org/10.1007/s11665-019-04289-4

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  • DOI: https://doi.org/10.1007/s11665-019-04289-4

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