104 results on '"Massone, A."'
Search Results
2. Laboratory testbed for the calibration and the validation of the shadow position sensor subsystem of the PROBA3 ESA mission
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Francesco Amadori, Davide Loreggia, Gianalfredo Nicolini, Gerardo Capobianco, Giuseppe Massone, Alessandro Bemporad, Maurizio Pancrazzi, Vladimiro Noce, Marta Casti, Marco Romoli, L. Zangrilli, Silvano Fineschi, Federico Landini, and Massimiliano Belluso
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Computer science ,Calibration (statistics) ,Testbed ,Shadow ,Position sensor ,Remote sensing - Published
- 2021
3. PolarCam micropolarizer cameras characterization and usage
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Silvano Fineschi, Gerardo Capobianco, L. Zangrilli, Alessandro Liberatore, Giuseppe Massone, Gianalfredo Nicolini, and Roberto Susino
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Matching (graph theory) ,Pixel ,Orientation (computer vision) ,business.industry ,Computer science ,Polarimetry ,law.invention ,law ,Modulation (music) ,Calibration ,Computer vision ,Artificial intelligence ,business ,Rotation (mathematics) ,Coronagraph - Abstract
Several experiments need to acquire images with different linear polarisation. Acquisition of successive images through a rotating polarising elements give the possibility to achieve this goal. However, the subsequent acquisition of these images implies a temporal modulation and a rotation mechanism (with a consequent consumption of space, power, etc. . . ). The PolarCam©, a camera where an array of linear micropolarizers with orientation are matching the sensor’s pixels, tries to solve these problems. In the present manuscript the features of this camera and the main aspects of its calibration are shown. Finally, an example of its application is presented. In particular, our application of this camera is for the Antarctica solar Coronagraph -AntarctiCor- for the “Extreme Solar Coronagraphy Antarctic Program Experiment” -ESCAPE- that used this technology for a ground-based polarimetric study of the solar K-corona from the Italian-French Concordia Base (Dome C - Antarctica).
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- 2021
4. Laboratory testbed for the calibration and the validation of the shadow position sensor subsystem of the PROBA3 ESA mission
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Loreggia, Davide, primary, Zangrilli, Luca, additional, Capobianco, Gerardo, additional, Massone, Giuseppe, additional, Belluso, Massimiliano, additional, Fineschi, Silvano, additional, Amadori, Francesco, additional, Noce, Vladimiro, additional, Bemporad, Alessandro, additional, Casti, Marta, additional, Nicolini, Gianalfredo, additional, Landini, Federico, additional, Pancrazzi, Maurizio, additional, and Romoli, Marco, additional
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- 2021
- Full Text
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5. PolarCam micropolarizer cameras characterization and usage
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Liberatore, Alessandro, primary, Fineschi, S., additional, Capobianco, G., additional, Massone, G., additional, Zangrilli, L., additional, Nicolini, G., additional, and Susino, R., additional
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- 2021
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6. Radiomics and artificial intelligence analysis of CT data for the identification of prognostic features in multiple myeloma
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Schenone, Daniela, primary, Lai, Rita, additional, Cea, Michele, additional, Rossi, Federica, additional, Torri, Lorenzo, additional, Bignotti, Bianca, additional, Succio, Giulia, additional, Gualco, Stefano, additional, Conte, Alessio, additional, Dominietto, Alida, additional, Massone, Anna Maria, additional, Piana, Michele, additional, Campi, Cristina, additional, Frassoni, Francesco, additional, Sambuceti, Gianmario, additional, and Tagliafico, Alberto S., additional
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- 2020
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7. Prognostic power of the human psoas muscles FDG metabolism in amyotrophic lateral sclerosis
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Lai, Rita, primary, Schenone, Daniela, additional, Sambuceti, Gianmario, additional, Massone, Anna Maria, additional, Campi, Cristina, additional, Chiò, Adriano, additional, Caponnetto, Claudia, additional, Cistaro, Angelina, additional, Bauckneht, Matteo, additional, Cossu, Vanessa, additional, Morbelli, Silvia, additional, Marini, Cecilia, additional, and Piana, Michele, additional
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- 2020
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8. Liquid-crystal tunable Lyot filter for solar corona spectro-polarimetry: tests and calibrations
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L. Capobianco, G. Capobianco, and G. Massone
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Materials science ,Optics ,Liquid crystal ,business.industry ,Polarimetry ,Lyot filter ,business - Published
- 2019
9. Alignment procedure for the Gregorian telescope of the Metis coronagraph for the Solar Orbiter ESA mission
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M.G. Sertsu, Sergio Mottini, Paola Zuppella, Roberto Susino, Chiara Casini, Vincenzo Andretta, Giuseppe Massone, Gianalfredo Nicolini, Marco Romoli, Fabio Frassetto, Michela Uslenghi, Ester Antonucci, Marco Castronuovo, Silvano Fineschi, Maurizio Pancrazzi, Luca Teriaca, Giampiero Naletto, Federico Landini, M. Casti, Daniele Spadaro, Gerardo Capobianco, Vania Da Deppo, and Piergiorgio Nicolosi
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Physics ,Gregorian telescope ,Aperture ,business.industry ,Astrophysics::Instrumentation and Methods for Astrophysics ,Curved mirror ,law.invention ,Alignment procedures ,Coronagraph ,Primary mirror ,Telescope ,Orbiter ,Optics ,law ,Auxiliary OGSE source ,Physics::Space Physics ,Astrophysics::Solar and Stellar Astrophysics ,Astrophysics::Earth and Planetary Astrophysics ,Secondary mirror ,business - Abstract
Metis is a solar coronagraph mounted on-board the Solar Orbiter ESA spacecraft. Solar Orbiter is scheduled for launch in February 2020 and it is dedicated to study the solar and heliospheric physics from a privileged close and inclined orbit around the Sun. Perihelion passages with a minimum distance of 0.28 AU are foreseen. Metis features two channels to image the solar corona in two different spectral bands: in the HI Lyman ∝ at 121.6 nm, and in the polarized visible light band (580 – 640 nm). Metis is a solar coronagraph adopting an “inverted occulted” configuration. The inverted external occulter (IEO) is a circular aperture followed by a spherical mirror which back rejects the disk light. The reflected disk light exits the instrument through the IEO aperture itself, while the passing coronal light is collected by the Metis telescope. Common to both channels, the Gregorian on-axis telescope is centrally occulted and both the primary and the secondary mirror have annular shape. Classic alignment methods adopted for on-axis telescope cannot be used, since the on-axis field is not available. A novel and ad hoc alignment set-up has been developed for the telescope alignment. An auxiliary visible optical ground support equipment source has been conceived for the telescope alignment. It is made up by four collimated beams inclined and dimensioned to illuminate different sections of the annular primary mirror without being vignetted by other optical or mechanical elements of the instrument.
- Published
- 2019
10. Metis/Solar Orbiter polarimetric visible light channel calibration
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Ester Antonucci, Giuseppe Massone, F. Frassetto, Michela Uslenghi, Daniele Spadaro, Gerardo Capobianco, Maurizio Pancrazzi, Gianalfredo Nicolini, Roberto Susino, V. Da Deppo, Marco Castronuovo, P. Nicolosi, Marco Romoli, Luca Teriaca, Silvano Fineschi, Federico Landini, M. Casti, Giampiero Naletto, and Vincenzo Andretta
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Physics ,Linear polarization ,business.industry ,Astrophysics::Instrumentation and Methods for Astrophysics ,Polarimetry ,Solar corona ,Polarimeter ,Polarizer ,Polarization (waves) ,law.invention ,Coronagraph ,Orbiter ,Optics ,Liquid crystal ,law ,Polarization ,Astrophysics::Solar and Stellar Astrophysics ,Astrophysics::Earth and Planetary Astrophysics ,business - Abstract
Metis is the solar coronagraph of the ESA mission Solar Orbiter. For the first time, Metis will acquire simultaneous images of the solar corona in linearly polarized, broadband visible light (580-640 nm) and in the narrow-band HI Ly-? line (121.6 nm). The visible light path includes a polarimeter, designed to observe and analyse the K-corona linearly polarized by Thomson scattering. The polarimeter comprises a liquid crystal Polarization Modulation Package (PMP) together with a quarter-wave retarder and a linear polarizer. The Metis PMP consists of two Anti-Parallel Nematic Liquid Crystal Variable Retarders (LCVRs) with their fast axis parallel with respect to each other and a pre-tilted angle of the molecules in opposite direction. This configuration results in an instrumental wide field of view (±7°). The LCVRs provide an electro-optical modulation of the input polarized light by applying an electric field to the liquid crystal molecules inside the cells. A given optical retardance can be induced in the LCVRs by selecting a suitable voltage value. This paper reports the polarimetric characterization of the Visible-light channel for the Metis/Solar Orbiter coronagraph. The retardance-to-voltage calibration of the electro-optical polarimeter was characterized over the entire field of view of the coronagraph yielding a complete "polarimetric flat-field" of the Metis Visible-light channel.
- Published
- 2019
11. OPSys: optical payload systems facility for space instrumentation integration and calibration
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Vincenzo Andretta, Giampiero Naletto, Marco Romoli, Giuseppe Massone, G. Nicolini, Daniele Spadaro, Gerardo Capobianco, Silvano Fineschi, Federico Landini, Ester Antonucci, M. Casti, Maurizio Deffacis, and Alessandro Bellomo
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Engineering ,business.industry ,Payload ,Instrumentation ,law.invention ,law ,Cleanroom ,Range (aeronautics) ,Extreme ultraviolet ,Calibration ,Aerospace engineering ,business ,Aerospace ,Coronagraph - Abstract
The Optical Payload System (OPSys) is an INAF (italian National Institute for Astrophysics) facility hosted by Aerospace Logistics Technology Engineering Company (ALTEC SpA) in Turin, Italy. The facility is composed by three clean rooms having different cleanliness levels, a thermo-vacuum chamber (SPOCC, Space Optics calibration Chamber) with a motorized optical bench and several light sources covering the range from the extreme ultraviolet to the red light wavelengths. The SPOCC has been designed having in mind the very stringent requirements of the calibration of solar coronagraphs and the suppression of the stray-light. The facility and the optical performances will be described here. The calibration campaign performed on Metis space coronagraph will be reported as a case study.
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- 2019
12. Wide field of view liquid crystals-based modulator for the polarimeter of the Metis/Solar Orbiter
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Giuseppe Massone, Pilar García Parejo, Federico Landini, Ester Antonucci, M. Casti, Marco Romoli, Daniele Spadaro, Gerardo Capobianco, Alberto Alvarez Herrero, Vincenzo Andretta, Silvano Fineschi, Mewael G. Sertsu, M. Marmonti, Giampiero Naletto, and Gianalfredo Nicolini
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Brightness ,Materials science ,Polarimetry ,02 engineering and technology ,01 natural sciences ,law.invention ,010309 optics ,Optics ,law ,Liquid crystal ,Solar Corona ,0103 physical sciences ,Electronic ,Optical and Magnetic Materials ,Mueller calculus ,Electrical and Electronic Engineering ,Coronagraph ,Calibrations ,Coronagraphy ,Liquid Crystals ,Polarimeter ,Electronic, Optical and Magnetic Materials ,Condensed Matter Physics ,Computer Science Applications ,Computer Vision and Pattern Recognition ,Applied Mathematics ,business.industry ,Astrophysics::Instrumentation and Methods for Astrophysics ,Polarizer ,021001 nanoscience & nanotechnology ,Polarization (waves) ,0210 nano-technology ,business - Abstract
Metis is an inverted occulted coronagraph on-board the ESA/Solar Orbiter mission. The visible light path of the instrument will observe the "white" light (580-640 nm) linearly-polarized emission from the solar corona. The coronal polarized brightness allows retrieval of physical parameters such as the electron density and temperature of the K-corona. The Metis polarimeter comprises a quarter-wave retarder, the liquid crystal polarization modulation package (PMP) and a linear polarizer working as polarization analyser. The PMP consists of two Anti-Parallel Nematic Liquid Crystal Variable Retarders (LCVRs) with the fast axes parallels one to each other and a pre-tilted angle of the molecules in opposite direction, in order to maximize the homogeneity of the retardance across instrumental wide field of view: ±7 deg. This presentation reports the characterization of the PMP breadboard (BB), fully representative of the optical/polarimetric performances of the flight model. This characterization consisted in determining the performances of the device in terms of retardance as function of the applied voltage at different temperatures, angle of incidence and the variation of the retardance as a function of the wavelength. The calibrations were performed by measuring the complete Mueller matrix of the PMP-BB. The experimental results have been compared with the parameters of the theoretical model (e.g., depolarization, effective retardance, cells misalignment).
- Published
- 2018
13. Liquid-crystal tunable Lyot filter for solar corona spectro-polarimetry: tests and calibrations
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Capobianco, G., primary, Capobianco, L., additional, and Massone, G., additional
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- 2019
- Full Text
- View/download PDF
14. Metis/Solar Orbiter polarimetric visible light channel calibration
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Casti, M., primary, Fineschi, S., additional, Capobianco, G., additional, Romoli, M., additional, Antonucci, E., additional, Nicolini, G., additional, Naletto, G., additional, Nicolosi, P., additional, Spadaro, D., additional, Andretta, V., additional, Castronuovo, M., additional, Massone, G., additional, Susino, R., additional, Da Deppo, Vania, additional, Frassetto, F., additional, Landini, F., additional, Pancrazzi, M., additional, Teriaca, L., additional, and Uslenghi, M., additional
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- 2019
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15. Alignment procedure for the Gregorian telescope of the Metis coronagraph for the Solar Orbiter ESA mission
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Da Deppo, Vania, primary, Mottini, Sergio, additional, Naletto, Giampiero, additional, Frassetto, Fabio, additional, Zuppella, Paola, additional, Sertsu, Mewael G., additional, Romoli, Marco, additional, Fineschi, Silvano, additional, Antonucci, Ester, additional, Nicolini, Gianalfredo, additional, Nicolosi, Piergiorgio, additional, Spadaro, Daniele, additional, Andretta, Vincenzo, additional, Castronuovo, Marco, additional, Casti, Marta, additional, Capobianco, Gerardo, additional, Massone, Giuseppe, additional, Susino, Roberto, additional, Landini, Federico, additional, Pancrazzi, Maurizio, additional, Casini, C., additional, Teriaca, Luca, additional, and Uslenghi, Michela, additional
- Published
- 2019
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16. Stray light calibration for the Solar Orbiter/Metis solar coronagraph
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Landini, F., primary, Romoli, M., additional, Fineschi, S., additional, Casini, C., additional, Baccani, C., additional, Antonucci, E., additional, Nicolini, G., additional, Naletto, G., additional, Nicolosi, P., additional, Spadaro, D., additional, Andretta, V., additional, Castronuovo, M., additional, Casti, M., additional, Capobianco, G., additional, Massone, G., additional, Susino, R., additional, Da Deppo, V., additional, Frassetto, F., additional, Pancrazzi, M., additional, Teriaca, L., additional, Schuehle, U., additional, Heerlein, K., additional, and Uslenghi, M., additional
- Published
- 2019
- Full Text
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17. Optical performance of the Metis coronagraph on the Solar Orbiter ESA mission
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Frassetto, Fabio, primary, Da Deppo, Vania, additional, Zuppella, Paola, additional, Romoli, Marco, additional, Fineschi, Silvano, additional, Antonucci, Ester, additional, Nicolini, Giana, additional, Naletto, Giampiero, additional, Nicolosi, Piergiorgio, additional, Spadaro, Daniele, additional, Andretta, Vincenzo, additional, Castronuovo, Marco, additional, Casti, Marta, additional, Capobianco, Gerardo, additional, Massone, Giuseppe, additional, Susino, Roberto, additional, Landini, Federico, additional, Pancrazzi, Maurizio, additional, Teriaca, Luca, additional, Schühle, Udo, additional, Heerlein, Klaus, additional, and Uslenghi, Michela, additional
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- 2019
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18. OPSys: optical payload systems facility for space instrumentation integration and calibration
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Capobianco, Gerardo, primary, Fineschi, Silvano, additional, Massone, Giuseppe, additional, Landini, Federico, additional, Casti, Marta, additional, Bellomo, Alessandro, additional, Deffacis, Maurizio, additional, Romoli, Marco, additional, Antonucci, Ester, additional, Andretta, Vincenzo, additional, Naletto, Giampiero, additional, Nicolini, Gianalfredo, additional, and Spadaro, Daniele, additional
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- 2019
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19. ASPIICS/PROBA-3 formation flying solar coronagraph: Stray light analysis and optimization of the occulter
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Melanie Venet, Alexandra Mazzoli, Federico Landini, Giuseppe Massone, S. Vives, P. L. Lamy, and Marco Romoli
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Physics ,Spacecraft ,business.industry ,Stray light ,Aperture ,Corona ,law.invention ,Entrance pupil ,Telescope ,symbols.namesake ,Optics ,law ,symbols ,Arago spot ,business ,Coronagraph - Abstract
The “Association de Satellites Pour l'Imagerie et l'Interferometrie de la Couronne Solaire”, ASPIICS, selected by ESA for the PROBA-3 mission, heralds the next generation of coronagraph for solar research, exploiting formation flying to gain access to the inner corona under eclipse-like conditions for long periods of time. A detailed description of the ASPIICS instrument and of its scientific objectives can be found in [1]. ASPIICS is distributed on the two PROBA 3 spacecrafts (S/C) separated by 150 m. The coronagraph optical assembly is hosted by the “coronagraph S/C” protected from direct solar disk light by the occulting disk on the “occulter S/C”. The most critical issue in the design of a solar coronagraph is the reduction of the stray light due to the diffraction and scattering of the solar disk light by the occulter, the aperture and the optics. In the present article, we deal with two of these issues: - The analysis of the stray light inside the telescope. - The optimization of the external occulter edge, in order to eliminate the Poisson spot behind the occulter and to lower the stray light level going through the entrance pupil of the telescope. This work was performed in the framework of the ESA STARTIGER program which took place at the Laboratoire d’Astrophysique de Marseille (LAM) during a 6-month period from September 2009 to March 2010. In general, it is a very complicated task to combine the above two stray light issues together in the simulation and design phase as it requires to consider the propagation inside the telescope of the light diffracted by the external occulter. Actually, the present literature only reports diffraction calculations performed for simple occulting systems (i.e., two disks and serrated disk). A more pragmatic approach, also driven by the tight schedule of the STARTIGER program, is to separate the two contributions, and perform two different stray light analyses. This paper is dedicated to the description of both analyses: in particular, the first part is dedicated to the evaluation of the stray light inside the telescope, assuming a simple disk as occulter, and a preliminary baffle design is presented; the second part describes the investigation on the geometry of the external occulter, with a detailed description of the laboratory setup that has been designed and implemented to compare together several types of occulting systems.
- Published
- 2017
20. METIS: the visible and UV coronagraph for solar orbiter
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Stefano Pucci, Marco Malvezzi, Vincenzo Andretta, A. Berlicki, Silvano Fineschi, Daniele Telloni, Ester Antonucci, John D. Moses, Federico Landini, M. G. Pelizzo, Giuseppe Massone, S. Vives, Cristian Baccani, F. Frassetto, Mauro Focardi, Michela Uslenghi, Gianalfredo Nicolini, V. Da Deppo, Enrico Magli, Alessandro Bemporad, Luca Teriaca, Giampiero Naletto, Lucia Abbo, Marco Romoli, Maurizio Pancrazzi, Daniele Spadaro, Gerardo Capobianco, Piergiorgio Nicolosi, and Luca Poletto
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Physics ,business.industry ,Stray light ,Metis ,Polarimeter ,Occultation ,law.invention ,Coronagraph ,Orbiter ,Optics ,solar coronagraph ,law ,Solar Orbiter ,Ray tracing (graphics) ,business ,Zemax - Abstract
METIS coronagraph is designed to observe the solar corona with an annular field of view from 1.5 to 2.9 degrees in the visible broadband (580-640 nm) and in the UV HI Lyman-alpha, during the Sun close approaching and high latitude tilting orbit of Solar Orbiter. The big challenge for a coronagraph is the stray light rejection. In this paper after a description of the present METIS optical design, the stray light rejection design is presented in detail together with METIS off-pointing strategies throughout the mission. Data shown in this paper derive from the optimization of the optical design performed with Zemax ray tracing and from laboratory breadboards of the occultation system and of the polarimeter.
- Published
- 2017
21. Test plan for the PROBA3/ASPIICS scaled model measurement campaign
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Silvano Fineschi, Benoit Marquet, Alain Jody Corso, S. Vives, Davide Loreggia, M. Casti, Marco Romoli, Giuseppe Massone, Alessandro Bemporad, Gerardo Capobianco, Mauro Focardi, Maurizio Pancrazzi, Cristian Baccani, Cédric Thizy, Etienne Renotte, Vladimiro Noce, and Federico Landini
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Spacecraft ,business.industry ,Computer science ,Stray light ,Polarimetry ,Occultation ,law.invention ,Metrology ,Telescope ,law ,Solar simulator ,Aerospace engineering ,business ,Coronagraph - Abstract
PROBA3/ASPIICS (Association of Spacecraft for Polarimetric and Imaging Investigation of the Corona of the Sun) is the first formation flight solar coronagraph, scheduled by ESA for a launch and currently in phase C/D. It is constituted by two spacecraft (one hosting the occulter, diameter 142 cm, and one with the telescope) separated by 144 m, kept in strict alignment by means of complex active and metrology custom systems. The stray light analysis, which is always one the most critical work packages for a solar coronagraph, has been only theoretically investigated so far due to the difficulty of replicating the actual size system in a clean laboratory environment. The light diffracted by the external occulter is the worst offender for the stray light level on the instrument focal plane, thus there is strong interest for scaling at least the occultation system of the coronagraph and test it in front of a solar simulator in order to experimentally validate the expected theoretical performance. The theory for scaling the occulter, the occulter-pupil distance and the source dimension has been developed and a scaled model is being manufactured. A test campaign is going to be conducted at the OPSys facility in Torino in front of a solar simulator (conveniently scaled). This work accounts for the description of the scaled model laboratory set-up and of the test plan.
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- 2017
22. Wide field of view liquid crystals-based modulator for the polarimeter of the Metis/Solar Orbiter
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Andretta, Vincenzo, primary, Naletto, Giampiero, primary, Nicolini, Gianalfredo, primary, Spadaro, Daniele, primary, Alvarez-Herrero, Alberto, primary, Garcia-Parejo, Pilar, primary, Marmonti, Matteo, primary, Fineschi, Silvano, primary, Capobianco, Gerardo, primary, Casti, Marta, primary, Massone, Giuseppe, primary, Giday Sertsu, Mewael, primary, Landini, Federico, primary, Romoli, Marco, primary, and Antonucci, Ester, primary
- Published
- 2018
- Full Text
- View/download PDF
23. ASPIICS/PROBA-3 formation flying solar coronagraph: Stray light analysis and optimization of the occulter
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Venet, M., primary, Lamy, P., primary, Massone, G., primary, Landini, F., primary, Mazzoli, A., primary, Vivès, S., primary, and Romoli, M., primary
- Published
- 2017
- Full Text
- View/download PDF
24. METIS: the visible and UV coronagraph for solar orbiter
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Landini, F., primary, Antonucci, E., primary, Andretta, V., primary, Berlicki, A., primary, Fineschi, S., primary, Nicolini, G., primary, Teriaca, L., primary, Pucci, S., primary, Abbo, L., primary, Capobianco, G., primary, Telloni, D., primary, Frassetto, F., primary, Romoli, M., primary, Moses, J. D., primary, Naletto, G., primary, Nicolosi, P., primary, Spadaro, D., primary, Baccani, C., primary, Focardi, M., primary, Pancrazzi, M., primary, Bemporad, A., primary, Massone, G., primary, Magli, E., primary, Da Deppo, V., primary, Pelizzo, M. G., primary, Poletto, L., primary, Uslenghi, M., primary, Vives, S., primary, and Malvezzi, M., primary
- Published
- 2017
- Full Text
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25. Characterization of the ASPIICS/OPSE metrology sub-system and PSF centroiding procedure
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Cédric Thizy, Ileana Cernica, Vladimiro Noce, M. Casti, Jean-Sébastien Servaye, M. Nisulescu, Silvano Fineschi, Alessandro Bemporad, Mauro Focardi, Munizer Purica, Federico Landini, Etienne Renotte, Marco Romoli, M. Pancrazi, Giuseppe Massone, Cristian Baccani, Gerardo Capobianco, Davide Loreggia, and Gianalfredo Nicolini
- Subjects
Physics ,Spacecraft ,business.industry ,02 engineering and technology ,Orbital mechanics ,021001 nanoscience & nanotechnology ,01 natural sciences ,Metrology ,law.invention ,010309 optics ,Interferometry ,Optics ,Observational astronomy ,law ,0103 physical sciences ,Satellite ,0210 nano-technology ,business ,Coronagraph ,Position sensor ,Remote sensing - Abstract
years have raised increasing interest. Many applications of astronomical observation techniques, as coronography and interferometry get great benefit when moved in space and the employment of diluted systems represents a milestone to step-over in astronomical research. In this work, we present the Optical Position Sensors Emitter (OPSE) metrological sub-system on-board of the PROBA3. PROBA3 is an ESA technology mission that will test in-orbit many metrology techniques for the maintenance of a Formation Flying with two satellites, in this case an occulter and a main satellite housing a coronagraph named ASPIICS, kept at an average inter-distance of 144m. The scientific task is the observation of the Sun’s Corona at high spatial and temporal resolution down to 1.08R⊙. The OPSE will monitor the relative position of the two satellites and consists of 3 emitters positioned on the rear surface of the occulter, that will be observed by the coronagraph itself. A Centre of Gravity (CoG) algorithm is used to monitor the emitter’s PSF at the focal plane of the Coronagraph retrieving the Occulter position with respect to the main spacecraft. The 3σ location target accuracy is 300μm for lateral movement and 21cm for longitudinal movements. A description of the characterization tests on the OPSE LED sources, and of the design for a laboratory set-up for on ground testing is given with a preliminary assessment of the performances expected from the OPSE images centroiding algorithm.
- Published
- 2016
26. The satellite formation flying in lab: PROBA-3/ASPIICS metrology subsystems test-bed
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Giuseppe Massone, Munizer Purica, Gianalfredo Nicolini, Cédric Thizy, Alessandro Bemporad, Marta Casti, I. Mechmech, E. Budianu, Etienne Renotte, Kevin O'Neill, Marco Romoli, Steve Buckley, Gerardo Capobianco, Silvano Fineschi, Federico Landini, Davide Loreggia, Jean-Sébastien Servaye, Mauro Focardi, Ileana Cernica, Maurizio Pancrazzi, Cristian Baccani, and Vladimiro Noce
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Physics ,Spacecraft ,business.industry ,Instrumentation ,Astrophysics::Instrumentation and Methods for Astrophysics ,Solar radius ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Metrology ,law.invention ,010309 optics ,law ,Physics::Space Physics ,0103 physical sciences ,Shadow ,Astrophysics::Solar and Stellar Astrophysics ,Satellite ,Astrophysics::Earth and Planetary Astrophysics ,0210 nano-technology ,business ,Coronagraph ,Position sensor ,Remote sensing - Abstract
Formation flying is one of the most promising techniques for the future of astronomy and astrophysics from the space. The capabilities of the rockets strongly affect the dimensions and the weights of telescopes and instrumentation to be launched. Telescopes composed by several smallest satellites in formation flying, could be the key for build big space telescopes. With this aim, the ESA PROBA-3 mission will demonstrate the capabilities of this technology, maintaining two satellites aligned within 1 mm (longitudinal) when the nominal distance between the two is of around 144m. The scientific objective of the mission is the observation of the solar corona down to 1.08 solar radii. The Coronagraph Spacecraft (CSC) will observe the Sun, when the second spacecraft, the Occulter Spacecraft (OSC) will work as an external occulter, eclipsing to the CSC the sun disk. The finest metrology sub-systems, the Shadow Position Sensors (SPS) and the Occulter Position Sensor Emitters (OPSE) identifying respectively the CSC-Sun axis and the formation flying (i.e., CSC-OSC) axis will be considered here. In particular, this paper is dedicated to the test-bed for the characterization, the performance analysis and the algorithms capabilities analysis of the both the metrology subsystems. The test-bed is able to simulate the different flight conditions of the two spacecraft and will give the opportunity to check the response of the subsystems in the conditions as close as possible to the flight ones.
- Published
- 2016
27. The shadow position sensors (SPS) formation flying metrology subsystem for the ESA PROBA-3 mission: present status and future developments
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Jean-Sébastien Servaye, Mauro Focardi, Cédric Thizy, Cristian Baccani, Maurizio Pancrazzi, Etienne Renotte, Kevin O'Neill, Gianalfredo Nicolini, Marta Casti, Gerardo Capobianco, Federico Landini, Silvano Fineschi, Vladimiro Noce, Alessandro Bemporad, Davide Loreggia, Steve Buckley, I. Mechmech, Marco Romoli, L. Accatino, and Giuseppe Massone
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Physics ,010504 meteorology & atmospheric sciences ,Spacecraft ,business.industry ,Payload ,Orbital mechanics ,Breadboard ,01 natural sciences ,law.invention ,010309 optics ,Attitude control ,Light intensity ,Optics ,law ,0103 physical sciences ,business ,Coronagraph ,Position sensor ,0105 earth and related environmental sciences - Abstract
PROBA-3 [1] [2] is a Mission of the European Space Agency (ESA) composed of two formation-flying satellites, planned for their joint launch by the end of 2018. Its main purposes have a dual nature: scientific and technological. In particular, it is designed to observe and study the inner part of the visible solar corona, thanks to a dedicated coronagraph called ASPIICS (Association of Spacecraft for Polarimetric and Imaging Investigation of the Corona of the Sun), and to demonstrate the in-orbit formation flying (FF) and attitude control capability of its two satellites. The Coronagraph payload on-board PROBA-3 consists of the following parts: the Coronagraph Instrument (CI) with the Shadow Position Sensor (SPS) on the Coronagraph Spacecraft (CSC), the Occulter Position Sensor (OPSE) [3] [4] and the External Occulting (EO) disk on the Occulter Spacecraft (OSC). The SPS subsystem [5] is one of the main metrological devices of the Mission, adopted to control and to maintain the relative (i.e. between the two satellites) and absolute (i.e. with respect to the Sun) FF attitude. It is composed of eight micro arrays of silicon photomultipliers (SiPMs) [6] that shall be able to measure, with the required sensitivity and dynamic range as asked by ESA, the penumbral light intensity on the Coronagraph entrance pupil. With the present paper we describe the testing activities on the SPS breadboard (BB) and Development Model (DM) as well as the present status and future developments of this PROBA-3 metrological subsystem.
- Published
- 2016
28. HT-BONE: a graphical user interface for the identification of bone profiles in CT images via extended Hough transform
- Author
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Gianmario Sambuceti, Annalisa Perasso, Michele Piana, Mauro C. Beltrametti, Anna Maria Massone, and Cristina Campi
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Computer science ,Image processing ,0102 computer and information sciences ,02 engineering and technology ,01 natural sciences ,Hough transform ,law.invention ,Biomaterials ,law ,Atomic and Molecular Physics ,Nuclear Medicine and Imaging ,Electronic ,0202 electrical engineering, electronic engineering, information engineering ,medicine ,Segmentation ,Computer vision ,Optical and Magnetic Materials ,Graphical user interface ,medicine.diagnostic_test ,business.industry ,Hough transform, graphical user interface, algebraic plane curves, image processing ,graphical user interface ,algebraic plane curves ,Algebraic plane curves ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Radiology, Nuclear Medicine and Imaging ,Image segmentation ,image processing ,010201 computation theory & mathematics ,Positron emission tomography ,020201 artificial intelligence & image processing ,Artificial intelligence ,and Optics ,Radiology ,business - Abstract
It has been recently proved that the computational analysis of X-ray Computed Tomography (CT) images allows clinicians to assess the alteration of compact bone asset due to hematological diseases. HT-BONE implements a new method, based on an extension of the Hough transform (HT) to a wide class of algebraic curves, for accurately measuring global and regional geometric properties of trabecular and compact bone districts. In the case of CT/PET analysis, the segmentation of the CT images provides masks for Positron Emission Tomography (PET) data, extracting the metabolic activity in the region surrounded by compact bone tissue. HT-BONE offers an intuitive, user-friendly, Matlab-based Graphical User Interface (GUI) for all input/output procedures and the automatic managing of the segmentation process also from non-expert users: the CT/PET data can be loaded and browsed easily and the only pre-preprocessing required from the user is the drawing of Regions Of Interest (ROIs) around the bone districts under consideration. For each bone district, specific families of curves, whose reliability has been already tested in previous works, is automatically selected for the recognition task via HT. As output, the software returns masks of the segmented compact bone regions, images of the Standard Uptake Values (SUV) in the masked regions of PET slices, and the values of the parameters in the curve equations utilized in the HT procedure. This information can be used for all pathologies and clinical conditions for which the alteration of the compact bone asset or bone marrow distribution plays a crucial role.
- Published
- 2016
29. Test plan for the PROBA3/ASPIICS scaled model measurement campaign
- Author
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Landini, Federico, primary, Baccani, Cristian, primary, Vives, Sébastien, primary, Fineschi, Silvano, primary, Romoli, Marco, primary, Capobianco, Gerardo, primary, Massone, Giuseppe, primary, Casti, Marta, primary, Bemporad, Alessandro, primary, Focardi, Mauro, primary, Pancrazzi, Maurizio, primary, Loreggia, Davide, primary, Noce, Vladimiro, primary, Thizy, Cédric, primary, Renotte, Etienne, primary, Corso, Alain Jody, primary, and Marquet, Benoit, primary
- Published
- 2017
- Full Text
- View/download PDF
30. Polarizers tuned at key far-UV spectral lines for space instrumentation
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Larruquert, Juan I., additional, Malvezzi, A. Marco, additional, Rodríguez-de Marcos, Luis, additional, Giglia, Angelo, additional, Gutiérrez-Luna, Nuria, additional, Espinosa-Yáñez, Lucía, additional, Honrado-Benítez, Carlos, additional, Aznárez, José A., additional, Massone, Giuseppe, additional, Capobianco, Gerardo, additional, Fineschi, Silvano, additional, and Nannarone, Stefano, additional
- Published
- 2017
- Full Text
- View/download PDF
31. OPSE metrology system onboard of the PROBA3 mission of ESA
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Davide Loreggia, Alessandro Bemporad, Silvano Fineschi, Giuseppe Massone, E. Budianu, Gianalfredo Nicolini, Gerardo Capobianco, Etienne Renotte, Munizer Purica, Ileana Cernica, Maurizio Pancrazzi, Marco Romoli, Federico Landini, Jean-Sébastien Servaye, Mauro Focardi, and Cédric Thizy
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Physics ,Space technology ,Spacecraft ,business.industry ,Orbital mechanics ,law.invention ,Metrology ,Interferometry ,law ,Satellite ,business ,Coronagraph ,Position sensor ,Remote sensing - Abstract
In recent years, ESA has assessed several mission involving formation flying (FF). The great interest in this topics is mainly driven by the need for moving from ground to space the location of next generation astronomical telescopes overcoming most of the critical problems, as example the construction of huge baselines for interferometry. In this scenario, metrology systems play a critical role. PROBA3 is an ESA technology mission devoted to in-orbit demonstration of the FF technique, with two satellites, an occulter and a main satellite housing a coronagraph named ASPIICS, kept at an average inter-distance by about 144m, with micron scale accuracy. The guiding proposal is to test several metrology solution for spacecraft alignment, with the important scientific return of having observation of Corona at never reached before angular field. The Shadow Position Sensors (SPS), and the Optical Position Emitters Sensors (OPSE) are two of the systems used for FF fine tracking. The SPS are finalized to monitor the position of the two spacecraft with respect to the Sun and are discussed in dedicated papers presented in this conference. The OPSE will monitor the relative position of the two satellites and consists of 3 emitters positioned on the rear surface of the occulter, that will be observed by the coronagraph itself. By following the evolution of the emitters images at the focal plane the alignment of the two spacecrafts is retrieved via dedicated centroiding algoritm. We present an overview of the OPSE system and of the centroiding approach.
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- 2015
32. Design status of ASPIICS, an externally occulted coronagraph for PROBA-3
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Andres Alia, Jim Van der Meulen, Giuseppe Massone, Michał Mosdorf, Jean-Sébastien Servaye, Russell A. Howard, Michał Ładno, Joe Zender, Jean-Philippe A. Halain, Vít Lédl, Gianalfredo Nicolini, Serge Koutchmy, Carl Jackson, Mauro Focardi, Adrian Dinescu, Steve Buckley, Yvan Stockman, Gerardo Capobianco, Raluca Muller, Karel Patočka, Rafal Graczyk, Jean-Marie Gillis, Konrad Grochowski, Jan Rautakoski, Radek Peresty, Radek Lapáček, Antonios Paschalis, Camille Galy, Jacek Kosiec, Etienne Renotte, Radek Melich, Dominique Mollet, Aline Hermans, Radoslav Darakchiev, Kanaris Tsinganos, Tomáš Vít, Nico Van Vooren, Miroslaw Rataj, Michal Kurowski, Richard Desselle, Alessandro Bemporad, Marcin Darmetko, Tomasz Górski, Lucas Salvador, Estelle Graas, Damien Galano, Arkadiusz Swat, Vladimir Daniel, Łukasz Mosdorf, Piotr Orleanski, Mateusz Mroczkowski, Irina Popescu, Lieve de Vos, Pavel Psota, Roman Rybecký, Cristina Bramanti, Hubert Kasprzyk, Ileana Cernica, Cédric Thizy, Joseph Bernier, Jana Kovačičinová, Philippe Lamy, Brian McGarvey, Andrei Zhukov, Alicja Zarzycka, Maurizio Pancrazzi, Arnaud Debaize, Cornel Solomon, Davide Loreggia, Tomasz Walczak, Federico Landini, Karl Fleury-Frenette, Kevin O'Neill, Agnes Mestreau-Garreau, Michel Thome, François Denis, Marie-Catherine Palau, Bogdan Nicula, N. Kranitis, Sylvie Liébecq, A. Fumel, Emmanuel Janssen, Marco Romoli, Silvano Fineschi, and ITA
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Physics ,Spacecraft ,Solar eclipse ,business.industry ,Astronomy ,Space weather ,Solar physics ,Corona ,law.invention ,law ,Coronal mass ejection ,business ,Coronagraph ,Eclipse ,Remote sensing - Abstract
The "sonic region" of the Sun corona remains extremely difficult to observe with spatial resolution and sensitivity sufficient to understand the fine scale phenomena that govern the quiescent solar corona, as well as phenomena that lead to coronal mass ejections (CMEs), which influence space weather. Improvement on this front requires eclipse-like conditions over long observation times. The space-borne coronagraphs flown so far provided a continuous coverage of the external parts of the corona but their over-occulting system did not permit to analyse the part of the white-light corona where the main coronal mass is concentrated. The proposed PROBA-3 Coronagraph System, also known as ASPIICS (Association of Spacecraft for Polarimetric and Imaging Investigation of the Corona of the Sun), with its novel design, will be the first space coronagraph to cover the range of radial distances between ~1.08 and 3 solar radii where the magnetic field plays a crucial role in the coronal dynamics, thus providing continuous observational conditions very close to those during a total solar eclipse. PROBA-3 is first a mission devoted to the in-orbit demonstration of precise formation flying techniques and technologies for future European missions, which will fly ASPIICS as primary payload. The instrument is distributed over two satellites flying in formation (approx. 150m apart) to form a giant coronagraph capable of producing a nearly perfect eclipse allowing observing the sun corona closer to the rim than ever before. The coronagraph instrument is developed by a large European consortium including about 20 partners from 7 countries under the auspices of the European Space Agency. This paper is reviewing the recent improvements and design updates of the ASPIICS instrument as it is stepping into the detailed design phase.
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- 2015
33. Illumination system in visible light with variable solar-divergence for the solar orbiter METIS coronagraph
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Giuseppe Massone, Stefano Cesare, Gerardo Capobianco, M. Tordi, Silvano Fineschi, M. Bartolozzi, and ITA
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Physics ,Stray light ,business.industry ,Measure (physics) ,law.invention ,Orbiter ,Optics ,law ,Radiance ,Metis ,Divergence (statistics) ,business ,Coronagraph ,Visible spectrum ,Remote sensing - Abstract
The measurement of the stray-rejection capabilities of METIS is part of the acceptance package of the instrument. The Illumination System in Visible Light (ISVL) has been developed to allow the stray-light rejection measurement down to 1x10-9 and under different operating conditions. The main characteristics of ISVL are outlined and discussed; the activities for the integration and verification of ISVL included the absolute radiometric characterization of the facility, including radiance measurement and radiance spatial and angular distribution. The procedures used to measure the performances of the facility are discussed and the obtained results illustrated.
- Published
- 2015
34. Polarizers for a spectral range centered at 121.6 nm operating by reflectance or by transmittance
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Giuseppe Massone, Silvano Fineschi, José A. Méndez, Luis Rodríguez-de Marcos, Angelo Giglia, A. Marco Malvezzi, Gerardo Capobianco, Juan I. Larruquert, Fabio Frassetto, Paolo Miotti, Stefano Nannarone, and José A. Aznárez
- Subjects
Materials science ,business.industry ,solar corona ,Polarimetry ,far ultraviolet ,Polarimeter ,multilayer coatings ,Polarizer ,Polarization (waves) ,polarizers ,Spectral line ,Hanle effect ,law.invention ,Wavelength ,Optical coating ,Optics ,law ,vacuum ultraviolet ,Transmittance ,Optoelectronics ,business ,polarimetry - Abstract
12 págs.; Proc. SPIE 9510, EUV and X-ray Optics: Synergy between Laboratory and Space IV, 951008 (12 May 2015), Polarimetry is a powerful tool to interpret how the coronal plasma is involved in the energy transfer processes from the Sun’s inner parts to the outer space. Space polarimetry in the far ultraviolet (FUV) provides essential information of processes governed by the Doppler and Hanle resonant electron scattering effects. Among the key FUV spectral lines to observe these processes, H I Lyman α (121.6 nm) is the most intense. Some developing or proposed solar physics missions, such as CLASP, SolmeX, and COMPASS, plan to perform polarimetry at 121.6 nm. Classical solutions, such as a parallel plate of a transparent material, either MgF2 or LiF, result in a modest efficiency of the passing polarization component. The development of more efficient linear polarizers at this wavelength will benefit future space instruments. A research has been conducted to develop polarizers based on (Al/MgF2)n multilayer coatings in a band containing 121.6 nm, to obtain a significant efficiency increase over plates. Coatings operating by reflectance resulted in a high efficiency after approximately one year of storage under nitrogen. In parallel, coating polarizers operating by transmittance have been prepared for the first time. Transmissive polarizers have the advantage that they involve no deviation of the beam. As a further benefit, the developed transmittance polarizers additionally incorporate filtering properties to help reject wavelengths both shortwards and longwards of a band containing 121.6 nm. Hence a polarizer combined with a filter is obtained with a single device. The combined polarizer-filter could enable a higher performance polarimeter for solar physics if the use of a separate filter to isolate Lyman α turns unnecessary.
- Published
- 2015
35. The Shadow Positioning Sensors (SPS) for formation flying metrology on-board the ESA-PROBA3 mission
- Author
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Giuseppe Massone, Gerardo Capobianco, Etienne Renotte, Steve Buckley, Alessandro Bemporad, Marco Romoli, Federico Landini, Silvano Fineschi, Vladimiro Noce, Kevin O'Neill, Cristian Baccani, Cédric Thizy, Davide Loreggia, Jean-Sébastien Servaye, Mauro Focardi, Maurizio Pancrazzi, and Gianalfredo Nicolini
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Physics ,Spacecraft ,business.industry ,Stray light ,Orbital mechanics ,law.invention ,Entrance pupil ,Light intensity ,Optics ,law ,Satellite ,business ,Coronagraph ,Position sensor - Abstract
PROBA3 is an ESA technology mission devoted to in-orbit demonstration of the formation flight (FF) technique, with two satellites kept at an average inter-distance by about 144 m. The ASPIIC instrument on-board PROBA3 will be the first ever space-based coronagraph working on one satellite and having the external occulter located on the second satellite, thus allowing observations of the inner solar corona with unprecedented reduction of stray light. During the observational periods, the FF configuration will be maintained with very high precision and two different techniques will be implemented: the use of Shadow Positioning Sensors (SPS) located on the Coronagraph Spacecraft (diodes measuring the penumbral light intensity on the entrance pupil plane) and the use of Occulter Position Sensor LEDs (OPSE) located on the back side of the Occulter Spacecraft. This paper will review the main instrumental requirements on the SPS needed to determine the 3-dimensional relative positioning of the two PROBA3 satellites with high precision.
- Published
- 2015
36. Formation flying metrology for the ESA-PROBA3 mission: the Shadow Position Sensors (SPS) silicon photomultipliers (SiPMs) readout electronics
- Author
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Federico Landini, Steve Buckley, Jean-Sébastien Servaye, Etienne Renotte, Vladimiro Noce, Giuseppe Massone, Mauro Focardi, Gerardo Capobianco, Gianalfredo Nicolini, Cédric Thizy, Alessandro Bemporad, Kevin O'Neill, Cristian Baccani, Davide Loreggia, Maurizio Pancrazzi, Silvano Fineschi, and Marco Romoli
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Physics ,business.industry ,law.invention ,Entrance pupil ,Telescope ,Light intensity ,Optics ,Silicon photomultiplier ,law ,Satellite ,business ,Coronagraph ,Position sensor ,Eclipse - Abstract
The European Space Agency (ESA) is planning to launch in 2018 the PROBA3 Mission, designed to demonstrate the inorbit formation flying (FF) attitude capability of its two satellites and to observe the inner part of the visible solar corona as the main scientific objective. The solar corona will be observed thanks to the presence on the first satellite, facing the Sun, of an external occulter producing an artificial eclipse of the Sun disk. The second satellite will carry on the coronagraph telescope and the digital camera system in order to perform imaging of the inner part of the corona in visible polarized light, from 1.08 R⦿ up to about 3 R⦿. One of the main metrological subsystems used to control and to maintain the relative (i.e. between the two satellites) and absolute (i.e. with respect to the Sun) FF attitude is the Shadow Position Sensor (SPS) assembly. It is composed of eight micro arrays of silicon photomultipliers (SiPMs) able to measure with the required sensitivity and dynamic range the penumbral light intensity on the Coronagraph entrance pupil. In the following of the present paper we describe the overall SPS subsystem and its readout electronics with respect to the capability to satisfy the mission requirements, from the light conversion process on board the silicon-based SPS devices up to the digital signal readout and sampling.
- Published
- 2015
37. Polarimetric calibrations and astronomical polarimetry in the V-band with Solar Orbiter/METIS instrument
- Author
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Ester Antonucci, Piergiorgio Nicolosi, Giuseppe Massone, Mauro Focardi, Alessandro Bemporad, Gianalfredo Nicolini, Daniele Spadaro, Gerardo Capobianco, Giampiero Naletto, Marco Romoli, Silvano Fineschi, and Vincenzo Andretta
- Subjects
Astronomical Objects ,Polarimetry ,law.invention ,polarimetric calibrators ,Orbiter ,Optics ,in-flight calibration ,Planet ,law ,Astrophysics::Solar and Stellar Astrophysics ,polarimetry ,Physics ,business.industry ,Linear polarization ,solar corona ,Astrophysics::Instrumentation and Methods for Astrophysics ,Astronomy ,Solar Orbiter ,METIS ,space coronagraph ,calibration ,Polarimeter ,Polarization (waves) ,Stars ,Physics::Space Physics ,Astrophysics::Earth and Planetary Astrophysics ,business - Abstract
METIS is one of the remote sensing instruments on board the ESA- Solar Orbiter mission, that will be launched in July 2017. The Visible Light Channel (VLC) of the instrument is composed by an achromatic LC-based polarimeter for the study of the linearly polarized solar K-corona in the 580-640 nm bandpass. The laboratory calibrations with spectropolarimetric techniques and the in-flight calibrations of this channel, using some well knows linearly polarized stars in the FoV of the instrument with a degree of linear polarization DOLP > 10% are here discussed. The selection of the stars and the use of other astronomical targets (i.e. planets, comets,…) and the opportunity of measurements of the degree of linear polarization in the visible bandpass of some astronomical objects (i.e. Earth, comets,…) are also objects of this paper.
- Published
- 2014
38. ASPIICS: an externally occulted coronagraph for PROBA-3: Design evolution
- Author
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Jacek Kosiec, Etienne Renotte, Marco Romoli, Jean-Yves Plesseria, Cédric Thizy, Giuseppe Massone, Silvano Fineschi, Gerardo Capobianco, Vít Lédl, Radoslav Darakchiev, Michał Mosdorf, Bogdan Nicula, Jean-Philippe Halain, Michel Thome, Marie-Catherine Palau, Ryszard Wodnicki, Rafal Graczyk, Alexandra Mazzoli, Elena Carmen Baston, N. Kranitis, Christian Kintziger, Radek Peresty, Maurizio Pancrazzi, Gianalfredo Nicolini, Aline Hermans, Dominique Mollet, Carl Jackson, Radek Melich, Tomasz Walczak, Mauro Focardi, Kanaris Tsinganos, Andrei Zhukov, Federico Landini, François Denis, Antonis Paschalis, Miroslaw Rataj, Richard Desselle, Alessandro Bemporad, Tomasz Górski, Lieve de Vos, Ileana Cernica, and Piotr Orleanski
- Subjects
Physics ,law ,Primary (astronomy) ,Payload ,ASPIICS, Coronagraph, Formation flying, In-orbit demonstration, PROBA-3, Solar physics ,Satellite ,Orbital mechanics ,Solar physics ,Coronagraph ,Design evolution ,law.invention ,Astrobiology ,Eclipse - Abstract
PROBA-3 is a mission devoted to the in-orbit demonstration of precise formation flying techniques and technologies for future ESA missions. PROBA-3 will fly ASPIICS (Association de Satellites pour l’Imagerie et l’Interferometrie de la Couronne Solaire) as primary payload, which makes use of the formation flying technique to form a giant coronagraph capable of producing a nearly perfect eclipse allowing to observe the sun corona closer to the rim than ever before. The coronagraph is distributed over two satellites flying in formation (approx. 150m apart). The so called Coronagraph Satellite carries the camera and the so called Occulter Satellite carries the sun occulter disc. This paper is reviewing the design and evolution of the ASPIICS instrument as at the beginning of Phase C/D.
- Published
- 2014
39. Characterization of the ASPIICS/OPSE metrology sub-system and PSF centroiding procedure
- Author
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Loreggia, D., additional, Fineschi, S., additional, Capobianco, G., additional, Bemporad, A., additional, Focardi, M., additional, Landini, F., additional, Massone, G., additional, Casti, M., additional, Nicolini, G., additional, Pancrazi, M., additional, Romoli, M., additional, Noce, V., additional, Baccani, C., additional, Cernica, I., additional, Purica, M., additional, Nisulescu, M., additional, Thizy, C., additional, Servaye, J. S., additional, and Renotte, E., additional
- Published
- 2016
- Full Text
- View/download PDF
40. The satellite formation flying in lab: PROBA-3/ASPIICS metrology subsystems test-bed
- Author
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Capobianco, G., additional, Loreggia, D., additional, Fineschi, S., additional, Focardi, M., additional, Bemporad, A., additional, Casti, M., additional, Noce, V., additional, Landini, F., additional, Baccani, C., additional, Pancrazzi, M., additional, Romoli, M., additional, Massone, G., additional, Nicolini, G., additional, Buckley, S., additional, O'Neill, K., additional, Cernica, I., additional, Purica, M., additional, Budianu, E., additional, Thizy, C., additional, Servaye, J.-S., additional, Mechmech, I., additional, and Renotte, Etienne, additional
- Published
- 2016
- Full Text
- View/download PDF
41. The shadow position sensors (SPS) formation flying metrology subsystem for the ESA PROBA-3 mission: present status and future developments
- Author
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Focardi, M., additional, Noce, V., additional, Buckley, S., additional, O'Neill, K., additional, Bemporad, A., additional, Fineschi, S., additional, Pancrazzi, M., additional, Landini, F., additional, Baccani, C., additional, Capobianco, G., additional, Loreggia, D., additional, Casti, M., additional, Romoli, M., additional, Massone, G., additional, Nicolini, G., additional, Accatino, L., additional, Thizy, C., additional, Servaye, J. S., additional, Mechmech, I., additional, and Renotte, E., additional
- Published
- 2016
- Full Text
- View/download PDF
42. Advances in far-ultraviolet reflective and transmissive coatings for space applications
- Author
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Rodríguez-de Marcos, Luis, additional, Aznárez, José A., additional, Méndez, José A., additional, Larruquert, Juan I., additional, Vidal-Dasilva, M., additional, Malvezzi, A. Marco, additional, Giglia, Angelo, additional, Capobianco, Gerardo, additional, Massone, Giuseppe, additional, Fineschi, Silvano, additional, and Nannarone, Stefano, additional
- Published
- 2016
- Full Text
- View/download PDF
43. HT-BONE: a graphical user interface for the identification of bone profiles in CT images via extended Hough transform
- Author
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Campi, Cristina, additional, Perasso, Annalisa, additional, Beltrametti, Mauro C., additional, Piana, Michele, additional, Sambuceti, Gianmario, additional, and Massone, Anna Maria, additional
- Published
- 2016
- Full Text
- View/download PDF
44. Hardware simulator of Caliste-SO detectors for STIX instrument
- Author
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Michał Mosdorf, D. Ścisłowski, G. J. Hurford, M. Michalska, M. Byrne, I. W. Kienreich, S. Giordano, J. Barylak, A. Barylak, L. Etesi, Andrzej Cichocki, N. G. Arnold, N. Hochmuth, André Csillaghy, Anna Maria Massone, Rafal Graczyk, Astrid Veronig, D. Shaun Bloomfield, Piotr Orleanski, Michele Piana, Oliver Grimm, Tomasz Mrozek, O. Gevin, A. Meuris, Marina Battaglia, Witold Nowosielski, Konrad Skup, Olivier Limousin, Marek Stęślicki, Säm Krucker, Janusz Sylwester, Miroslaw Kowalinski, and Piotr Podgorski
- Subjects
Physics ,Data processing ,Spectrometer ,Physics::Instrumentation and Detectors ,Instrument Data ,business.industry ,Detector ,Astrophysics::Instrumentation and Methods for Astrophysics ,law.invention ,Telescope ,Orbiter ,Software ,law ,Electronic engineering ,business ,Field-programmable gate array ,Computer hardware - Abstract
The Spectrometer Telescope for Imaging X-rays (STIX) is one of 10 instruments on-board Solar Orbiter mission of the European Space Agency (ESA) scheduled to be launched in 2017. STIX is aimed to provide imaging spectroscopy of solar thermal and non-thermal hard X-ray emissions from 4 keV to 150 keV using a Fourier-imaging technique. The instrument employs a set of tungsten grids in front of 32 pixelized CdTe detectors. These detectors are source of data collected and analyzed in real time by Instrument Data Processing Unit (IDPU). In order to support development and implementation of on-board algorithms a dedicated detector hardware simulator is designed and manufactured as a part of Electrical Ground Support Equipment (EGSE) for STIX instrument. Complementary to the hardware simulator is data analysis software which is used to generate input data and to analyze output data. The simulator will allow sending strictly defined data from all detectors’ pixels at the input of the IDPU for further analysis of instrument response. Particular emphasis is given here to the simulator hardware design.
- Published
- 2013
45. Improved stray light suppression performance for the solar orbiter/METIS inverted external occulter
- Author
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Maurizio Pancrazzi, C. Escolle, Silvano Fineschi, Gerardo Capobianco, Giuseppe Massone, Enzo Turchi, Mauro Focardi, Christophe Guillon, Federico Landini, Marco Romoli, S. Vives, and Davide Loreggia
- Subjects
Physics ,business.industry ,Stray light ,Curved mirror ,law.invention ,Entrance pupil ,Telescope ,Orbiter ,Optics ,law ,Thermal ,business ,Coronagraph ,Conic optimization - Abstract
The Solar Orbiter/METIS visible and UV coronagraph introduces the concept of occulter inversion in solar coronagraphy. Classical externally occulted coronagraphs usually have a disk in front of the telescope entrance pupil. According to the mission requirements, in order to reduce the amount of power entering the instrument and to limit the instrument dimensions, METIS is equipped with an inverted external occulter (IEO). The IEO consists of a circular aperture on the Solar Orbiter thermal shield that acts as coronagraph entrance pupil. A spherical mirror (M0), located ~800 mm behind the IEO, rejects back the disk-light through the IEO itself. A light-tight boom connects the IEO to the M0 through the thermal shield. In order to achieve high performance in stray light suppression, the IEO design needs optimization. Due to the novelty of the concept we can only use the heritage of past space-borne coronagraph occulters as a starting point to design a dedicated occulter optimization shape. A 1.5 years long, accurate test campaign has been carried out to evaluate the best optimization configuration for the IEO. Two prototypes were manufactured to take into account the impact of the boom geometry on the stray light suppression performance. Two optimization concepts were compared: the inverted cone (that derives from the conic optimization of classical occulting disks) and the serrated edge, of which several samples were manufactured, with different geometrical parameters, surface roughnesses and coatings. This work summarizes the activity we have been carrying on to define the flight specifications for the METIS occulter.
- Published
- 2013
46. Characterization of linear polarizers in the wavelength range 100-150 nm (VUV) for solar physics applications
- Author
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Fabio Frassetto, Paolo Miotti, Stefano Nannarone, Angelo Giglia, José Antonio Méndez, Gerardo Capobianco, Marco Malvezzi, Juan I. Larruquert, José A. Aznárez, Giuseppe Massone, Silvano Fineschi, L. Rodríguez-De Marcos, and Giuseppe Crescenzio
- Subjects
Materials science ,business.industry ,Polarimetry ,Resonance ,Polarizer ,Solar physics ,Synchrotron ,law.invention ,Optics ,Beamline ,law ,Calibration ,Optoelectronics ,Thin film ,business - Abstract
VUV polarimetry has been recognized as one of the most powerful diagnostic tools for remote sensing of the solar corona, with the potential of providing accurate space resolved information on magnetic activity through observation of resonance lines of the most abundant species. In an on-going collaboration between our groups from Spain and Italy, a program to design, build and characterize optical components for the VUV region has been activated. In particular, using the beamline BEAR at the synchrotron facility Elettra in Trieste (Italy) we have characterized some thin film reflecting linear polarizers, designed and optimized for the study of polarimetric properties of the HI Ly-alpha at 121.6 nm. The characterizations are performed from 100 to 150 nm at different angles of incidence (40 – 80 deg). Some polarizers have shown excellent performances with an average reflectivity R ≈ 34% and a modulation factor exceeding 95%. The calibration of several samples is reported and aging effects on some old samples is discussed. One of the calibrated sample will be used for the evaluation of the performances of a new fast calibration set-up facility for VUV.
- Published
- 2013
47. A single-shot optical linear polarimeter for asteroid studies
- Author
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Paolo Tanga, P. Bendjoya, Alberto Cellino, Giuseppe Massone, L. Abe, Claudio Pernechele, J. P. Rivet, ITA, and FRA
- Subjects
Physics ,business.industry ,Linear polarization ,Detector ,Polarimetry ,Cassegrain reflector ,Polarimeter ,Polarization (waves) ,law.invention ,Telescope ,symbols.namesake ,Optics ,law ,symbols ,Stokes parameters ,business ,Remote sensing - Abstract
Polarimetric studies of minor Solar System bodies are useful to access physical parameters, such as albedo and diameter, which are both important and difficult to derive by other techniques. Current activities in this field are limited since most instruments adopted in recent observing campaigns involve photomultipliers detectors. These sensors are suitable for observations of objects with fast polarization variations, but usually suffer from low quantum efficiency. This severely limits the number of accessible targets. For asteroids, the polarization evolves slowly enough to allow more sensitive albeit slower detectors (CCD-based polarimeters). However, polarimetric measurement accuracy may be hampered with usual "sequential" polarimeters. Indeed, retarder plate swapping time, readout and exposure time add up. Consequently, the time laps between complementary polarization measurements (some minutes) may be non-negligible in some cases, compared to the evolution time of the polarization parameters. Moreover, polarimetric accuracy may also be limited by airmass variations between complementary exposures. We are developing a new "single-shot" CCD polarimeter based on a "double-Wollaston" configuration already described in literature [9][10]. This allows simultaneous acquisition of the three Stokes parameters I, Q, U without any moving parts. So, the linear polarization degree can be measured accurately, even for targets with fast polarization and/or airmass variations. Presently, the polarization analyzer is in calibration phase, and will be installed soon at the F/12.5 Cassegrain focus of the West telescope at the "Centre Pédagogique Planète et Univers" facility (C2PU, Observatoire de la Côte d'Azur, Plateau de Calern, France).
- Published
- 2012
48. Electro-optical polarimeters for ground-based and space-based observations of the solar K-corona
- Author
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P. Calcidese, E. Balboni, Giuseppe Massone, Giuseppe Crescenzio, L. Zangrilli, Gerardo Capobianco, Silvano Fineschi, M. Patrini, Ester Antonucci, and A. M. Malvezzi
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Physics ,Brightness ,Linear polarization ,business.industry ,Polarimetry ,Polarimeter ,Polarization (waves) ,Corona ,law.invention ,Telescope ,Optics ,law ,business ,Coronagraph - Abstract
Polarimeters based on electro-optically tunable liquid crystals (LC) represent a new technology in the field of observational astrophysics. LC-based polarimeters are good candidates for replacing mechanically rotating polarimeters in most ground-based and space-based applications. During the 2006 total solar eclipse, we measured the visible-light polarized brightness (pB) of the solar K-corona with a LC-based polarimeter and imager (E-KPol). In this presentation, we describe the results obtained with the E-KPol, and we evaluate its performances in view of using a similar device for the pB imaging of the K-corona from space-based coronagraphs. Specifically, a broad-band LC polarimeter is planned for the METIS (Multi Element Telescope for Imaging and Spectroscopy) coronagraph for the Solar Orbiter mission to be launched in 2017. The METIS science driver of deriving the coronal electron density from pB images requires an accuracy of better than 1% in the measurement of linear polarization. We present the implications of this requirement on the METIS design to minimize the instrumental polarization of the broad-band visible-light (590-650 nm) polarimeter and of the other optics in the METIS visible-light path. Finally, we report preliminary ellipsometric measurements of the optical components of the METIS visible-light path.
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- 2012
49. Imaging polarimetry with the METIS coronagraph of the Solar Orbiter mission
- Author
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Marco Malvezzi, Silvano Fineschi, Giuseppe Crescenzio, Giuseppe Massone, Marco Romoli, Gerardo Capobianco, Gianalfredo Nicolini, Federico Landini, and Ester Antonucci
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Physics ,business.industry ,Polarimetry ,Astronomy ,Polarimeter ,Polarization (waves) ,Solar physics ,law.invention ,Telescope ,Orbiter ,Optics ,law ,Achromatic lens ,business ,Coronagraph - Abstract
METIS, the "Multi Element Telescope for Imaging and Spectroscopy", is a coronagraph of the Solar Orbiter mission to be launched in 2017. The METIS coronagraph includes three optical paths for i) broad-band imaging of the full corona in polarized visible-light (590-650 nm); ii) narrow-band coronal imaging in the UV HI Ly α (121.6 nm) and extreme-UV He II Ly α (30.4 nm), and iii) spectroscopic observations of the HI and He II Ly α. This presentation describes the optical design of the METIS visible-light path for imaging polarimetry of the K-corona. The achromatic polarimeter's requirements on polarization sensitivity, achromatic response and instrumental polarization control are described. The expected performances of the visible-light path are also presented.
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- 2012
50. METIS: a novel coronagraph design for the Solar Orbiter mission
- Author
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A. Berlicki, Udo Schühle, Maurizio Pancrazzi, Federico Landini, Marco Malvezzi, Ester Antonucci, Sami K. Solanki, Vania Da Deppo, Daniele Telloni, Piergiorgio Nicolosi, Vincenzo Andretta, Luca Poletto, Giuseppe Massone, Lucia Abbo, Maria Guglielmina Pelizzo, Mauro Focardi, Luca Teriaca, Giampiero Naletto, Daniele Spadaro, Gerardo Capobianco, Gianalfredo Nicolini, Giuseppe Crescenzio, Silvano Fineschi, J. Dan Moses, Marco Romoli, Michela Uslenghi, and Alessandro Bemporad
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Optical telescopes ,Design ,Space telescopes ,law.invention ,Telescope ,Primary mirror ,Solar instrumentations ,Orbiter ,Optics ,UV imaging ,law ,Spacecraft ,Spectrograph ,Coronagraph ,Spectrography ,Visible light ,Space flight ,Physics ,business.industry ,Liquid crystals ,Gamma rays ,Astronomy ,Mirrors ,Extreme ultraviolet ,Instruments ,business ,Secondary mirror ,Coronagraphy - Abstract
METIS (Multi Element Telescope for Imaging and Spectroscopy) METIS, the "Multi Element Telescope for Imaging and Spectroscopy", is a coronagraph selected by the European Space Agency to be part of the payload of the Solar Orbiter mission to be launched in 2017. The mission profile will bring the Solar Orbiter spacecraft as close to the Sun as 0.3 A.U., and up to 35? out-of-ecliptic providing a unique platform for helio-synchronous observations of the Sun and its polar regions. METIS coronagraph is designed for multi-wavelength imaging and spectroscopy of the solar corona. This presentation gives an overview of the innovative design elements of the METIS coronagraph. These elements include: i) multi-wavelength, reflecting Gregorian-Telescope; ii) multilayer coating optimized for the extreme UV (30.4 nm, HeII Lyman-?) with a reflecting cap-layer for the UV (121.6 nm, HI Lyman-?) and visible-light (590-650); iii) inverse external-occulter scheme for reduced thermal load at spacecraft peri-helion; iv) EUV/UV spectrograph using the telescope primary mirror to feed a 1st and 4th-order spherical varied line-spaced (SVLS) grating placed on a section of the secondary mirror; v) liquid crystals electro-optic polarimeter for observations of the visible-light K-corona. The expected performances are also presented. © 2012 SPIE.
- Published
- 2012
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