MAJIS VIS-NIR channel: performances of the focal plane unit - flight model

Haffoud, Paolo; Arondel, Antoine; Bolsée, David; Carlier, Vincent; Carter, John; Cisneros-González, Miriam E.; Dubois, Jean‐Pierre; Dumesnil, C.; Filacchione, G.; Gonnod, Ludovic; Hannou, Cyrille; Hervier, V.; Karatekin, Özgür; Ketchazo, Christian; Langevin, Y.; Clec'h, Jean-Christophe Le; Lecomte, Benoit; Morinaud, Gilles; Pereira, Nuno; Piccioni, G.; Vandaele, Ann Carine; Laeken, Lionel Van; Vincendon, M.; Poulet, F.

doi:10.1117/12.2628884

Cited by 5 publications

(3 citation statements)

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“…The BIRA-IASB VIS-NIR characterization facility was already used to characterize the SM and FM VIS-NIR detectors of MAJIS/JUICE, 30 , 31 and is now offered to the scientific community as another option for future characterizations.…”

Section: Discussionmentioning

confidence: 99%

“…Note that an overestimation of the electronic conversion gain can be induced by interpixel capacitance, 39 which can lead to an overestimation of the QE. For the MAJIS VIS-NIR detectors, a factor of 0.93 is applied to the determined conversion gain to correct this effect 30 QE(x,y,λ)=EpPWP(x,y,λ)·gFWP(x,y)IT.…”

Section: Subsystems Validationmentioning

confidence: 99%

“…In this paper, a new VIS-NIR characterization facility from the Royal Belgian Institute for Space Aeronomy (BIRA-IASB) is described. This facility has been already used to characterize the VIS-NIR detectors of the Moons And Jupiter Imaging Spectrometer (MAJIS), 30 , 31 one of the instruments on board the Jupiter ICy Moons Explorer (JUICE). This facility is offered to the scientific community as another option for future projects and contributions.…”

Section: Introductionmentioning

confidence: 99%

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Facility for the radiometric characterization of space-based visible-near infrared detectors

Cisneros-González,

Bolsée,

Pereira

et al. 2023

J. Astron. Telesc. Instrum. Syst.

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When developing new astronomical instruments, there is a need to perform the characterization of their individual components, especially the detectors, to ensure that their performances comply with the scientific objectives of the instrument. A visiblenear infrared (VIS-NIR) facility was developed for the absolute and relative radiometric characterization of space-based detectors at the Royal Belgian Institute for Space Aeronomy (BIRA-IASB). The facility operates from 0.4 to 2.65 μm in an ISO-5 environment. It offers a tunable monochromatic flux with a high level of straylight rejection (10 −8 ) and 2% uniformity, over a four-decade range of intensity with adjustable bandwidth. Latency measurements are also possible. Thermalization is offered within a precision of 7 mK between 50 K and 382 K. The ultimate vacuum level of the detector chamber is below 10 −6 mbar. A robust security system avoids both reaching temperatures outside the operational range of the detector and its electronics, and contamination due to vacuum loss. The facility was already used to characterize the VIS-NIR detectors of the Moons And Jupiter Imaging Spectrometer (MAJIS), one of the instruments on board the Jupiter ICy Moons Explorer (JUICE). The versatility provided by the VIS-NIR facility allows its use for the characterization of other astronomical detectors.

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Section: Discussionmentioning

confidence: 99%

Section: Subsystems Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Facility for the radiometric characterization of space-based visible-near infrared detectors

Cisneros-González,

Bolsée,

Pereira

et al. 2023

J. Astron. Telesc. Instrum. Syst.

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Moons and Jupiter Imaging Spectrometer (MAJIS) on Jupiter Icy Moons Explorer (JUICE)

Poulet,

Piccioni,

Langevin

et al. 2024

Space Sci Rev

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The MAJIS (Moons And Jupiter Imaging Spectrometer) instrument on board the ESA JUICE (JUpiter ICy moon Explorer) mission is an imaging spectrometer operating in the visible and near-infrared spectral range from 0.50 to 5.55 μm in two spectral channels with a boundary at 2.3 μm and spectral samplings for the VISNIR and IR channels better than 4 nm/band and 7 nm/band, respectively. The IFOV is 150 μrad over a total of 400 pixels. As already amply demonstrated by the past and present operative planetary space missions, an imaging spectrometer of this type can span a wide range of scientific objectives, from the surface through the atmosphere and exosphere. MAJIS is then perfectly suitable for a comprehensive study of the icy satellites, with particular emphasis on Ganymede, the Jupiter atmosphere, including its aurorae and the spectral characterization of the whole Jupiter system, including the ring system, small inner moons, and targets of opportunity whenever feasible. The accurate measurement of radiance from the different targets, in some case particularly faint due to strong absorption features, requires a very sensitive cryogenic instrument operating in a severe radiation environment. In this respect MAJIS is the state-of-the-art imaging spectrometer devoted to these objectives in the outer Solar System and its passive cooling system without cryocoolers makes it potentially robust for a long-life mission as JUICE is. In this paper we report the scientific objectives, discuss the design of the instrument including its complex on-board pipeline, highlight the achieved performance, and address the observation plan with the relevant instrument modes.

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Calibration of MAJIS (Moons And Jupiter Imaging Spectrometer). III. Spectral calibration

Haffoud,

Poulet,

Vincendon

et al. 2024

Review of Scientific Instruments

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The Moons And Jupiter Imaging Spectrometer (MAJIS) is the visible and near-infrared imaging spectrometer onboard the European Space Agency (ESA)’s Jupiter Icy Moons Explorer mission. Before its integration into the spacecraft, the instrument undergoes an extensive ground calibration to establish its baseline performances. This process prepares the imaging spectrometer for flight operations by characterizing the behavior of the instrument under various operative conditions and uncovering instrumental distortions that may depend on instrumental commands. Two steps of the on-ground calibration campaigns were held at the instrument level to produce the data. Additional in-flight measurements have recently been obtained after launch during the Near-Earth Commissioning Phase. In this article, we present the analyses of these datasets, focusing on the characterization of the spectral performances. First, we describe and analyze the spectral calibration datasets obtained using both monochromatic sources and polychromatic sources coupled with solid and gas samples. Then, we derive the spectral sampling and the spectral response function over the entire field of view. These spectral characteristics are quantified for various operational parameters of MAJIS, such as temperature and spectral binning. The derived on-ground performances are then compared with in-flight measurements obtained after launch and presented in the framework of the MAJIS performance requirements.

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MAJIS VIS-NIR channel: performances of the focal plane unit - flight model

Cited by 5 publications

References 0 publications

Facility for the radiometric characterization of space-based visible-near infrared detectors

Facility for the radiometric characterization of space-based visible-near infrared detectors

Moons and Jupiter Imaging Spectrometer (MAJIS) on Jupiter Icy Moons Explorer (JUICE)

Calibration of MAJIS (Moons And Jupiter Imaging Spectrometer). III. Spectral calibration

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