Mr. Gianluca Casarosa Profile

Gianluca Casarosa

Electronic Engineer at European Space Research and Technology Ctr

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Publications (6)

Proceedings Article | 10 August 2023 Poster

Infrared thermography at low temperature

Jean-François Vandenrijt, Stéphane Roose, Gianluca Casarosa

Proceedings Volume 12618, 1261830 (2023) https://doi.org/10.1117/12.2675598

KEYWORDS: Temperature metrology, Thermography, Infrared radiation, Measurement uncertainty, Emissivity, Vacuum, Infrared cameras, Thermal modeling, Temperature control, Space operations

Proceedings Article | 12 July 2019 Open Access

End to end calibration of a radiometer at high irradiance levels

Steven van den Berg, Omar El Gawhary, Paul Dekker, Marijn van Veghel, Ramon Vink, Steven Sablerolle, Gianluca Casarosa

Proceedings Volume 11180, 111807Y (2019) https://doi.org/10.1117/12.2536205

KEYWORDS: Radiometry, Calibration, Sensors, Beam shaping, Radio optics, Optical testing, Sun, Cryogenics, Geometrical optics, Signal attenuation

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Proceedings Article | 21 November 2017 Open Access

Thermal/vacuum measurements of the Herschel space telescope by close-range photogrammetry

J. Amiri Parian, A. Cozzani, M. Appolloni, G. Casarosa

Proceedings Volume 10566, 105662K (2017) https://doi.org/10.1117/12.2308291

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Proceedings Article | 21 November 2017 Open Access

Multi-parameter fibre Bragg grating sensor-array for thermal vacuum cycling test

L. Cheng, B. Ahlers, P. Toet, G. Casarosa, M. Appolloni

Proceedings Volume 10566, 105661E (2017) https://doi.org/10.1117/12.2308294

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Fibre Bragg Grating (FBG) sensor systems based on optical fibres are gaining interest in space applications. Studies on Structural Health Monitoring (SHM) of the reusable launchers using FBG sensors have been carried out in the Future European Space Transportation Investigations Programme (FESTIP). Increasing investment in the development on FBG sensor applications is foreseen for the Future Launchers Preparatory Programme (FLPP). TNO has performed different SHM measurements with FBGs including on the VEGA interstage [1, 2] in 2006.

Within the current project, a multi-parameter FBG sensor array demonstrator system for temperature and strain measurements is designed, fabricated and tested under ambient as well as Thermal Vacuum (TV) conditions in a TV chamber of the European Space Agency (ESA), ESTEC site. The aim is the development of a multi-parameters measuring system based on FBG technology for space applications. During the TV tests of a Space Craft (S/C) or its subsystems, thermal measurements, as well as strain measurements are needed by the engineers in order to verify their prediction and to validate their models. Because of the dimensions of the test specimen and the accuracy requested to the measurement, a large number of observation/measuring points are needed. Conventional sensor systems require a complex routing of the cables connecting the sensors to their acquisition unit. This will add extra weight to the construction under test. FBG sensors are potentially light-weight and can easily be multiplexed in an array configuration.

The different tasks comply of a demonstrator system design; its component selection, procurement, manufacturing and finally its assembly. The temperature FBG sensor is calibrated in a dedicated laboratory setup down to liquid nitrogen (LN₂) temperature at TNO. A temperature-wavelength calibration curve is generated. After a test programme definition a setup in thermal vacuum is realised at ESA premises including a mechanical strain transducer to generate strain via a dedicated feed through in the chamber. Thermocouples are used to log the temperature for comparison to the temperature FBG sensor. Extreme temperature ranges from -150°C and +70°C at a pressure down to 10-4 Pa (10-6 mbar) are covered as well as testing under ambient conditions. In total five thermal cycles during a week test are performed. The FBG temperature sensor test results performed in the ESA/ESTEC TV chamber reveal high reproducibility (within 1 °C) within the test temperature range without any evidence of hysteresis. Differences are detected to the previous calibration curve. Investigation is performed to find the cause of the discrepancy. Differences between the test set-ups are identified. Equipment of the TNO test is checked and excluded to be the cause. Additional experiments are performed.

The discrepancy is most likely caused by a ’thermal shock’ due to rapid cooling down to LN2 temperature, which results in a wavelength shift. Test data of the FBG strain sensor is analysed. The read-out of the FBG strain sensor varies with the temperature during the test. This can be caused by temperature induced changes in the mechanical setup (fastening of the mechanical parts) or impact of temperature to the mechanical strain transfer to the FBG. Improvements are identified and recommendations given for future activities.

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Proceedings Article | 24 August 2017 Paper

A pixelated x-ray detector for diffraction imaging at next-generation high-rate FEL sources

L. Lodola, L. Ratti, D. Comotti, L. Fabris, M. Grassi, P. Malcovati, M. Manghisoni, V. Re, G. Traversi, C. Vacchi, G. Batignani, S. Bettarini, F. Forti, G. Casarosa, F. Morsani, A. Paladino, E. Paoloni, G. Rizzo, M. Benkechkache, G.-F. Dalla Betta, R. Mendicino, L. Pancheri, G. Verzellesi, H. Xu

Proceedings Volume 10392, 103920D (2017) https://doi.org/10.1117/12.2276966

KEYWORDS: Free electron lasers, Sensors, X-ray detectors, X-rays, Diffraction, CMOS technology, X-ray sources, X-ray imaging, Image sensors, Synchrotrons

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Proceedings Article | 17 March 2005 Paper

Measurement system based on a high-speed camera and image processing techniques for testing of spacecraft subsystems

Gianluca Casarosa, Bruno Sarti

Proceedings Volume 5580, (2005) https://doi.org/10.1117/12.584287

KEYWORDS: Image processing, Cameras, Imaging systems, Space operations, High speed cameras, Edge detection, Frame grabbers, Interfaces, Image filtering, Aluminum

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