ATHENA X-IFU detector cooling chain

Branco, M. B. C.; Charles, I.; Butterworth, James

doi:10.1117/12.2056427

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…The performance ofCORE (and more generally of any future CMB space mission) is critically dependent on operating a (potentially large) array of sub-kelvin detectors in space. Such low temperature instruments have already been operated in previous space missions such as Planck (Planck Collaboration et al 2011), Herschel (Collaudin et al 2010, and Hitomi (Sneiderman et al 2016), and are also planned for future missions such as Athena (Branco et al 2014;Charles et al 2016). Nonetheless, cryogenic detectors in space are a challenge, and an element of risk for the performance of the mission.…”

Section: Cooling Chainmentioning

confidence: 99%

Exploring cosmic origins with CORE: Survey requirements and mission design

Delabrouille

Bernardis

Bouchet

et al. 2018

J. Cosmol. Astropart. Phys.

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158

161

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Future observations of cosmic microwave background (CMB) polarisation have the potential to answer some of the most fundamental questions of modern physics and cosmology, including: What physical process gave birth to the Universe we see today? What are the dark matter and dark energy that seem to constitute 95% of the energy density of the Universe? Do we need extensions to the standard model of particle physics and fundamental interactions? Is the ΛCDM cosmological scenario correct, or are we missing an essential piece of the puzzle? In this paper, we list the requirements for a future CMB polarisation survey addressing these scientific objectives, and discuss the design drivers of the CORE space mission proposed to ESA in answer to the "M5" call for a medium-sized mission. The rationale and options, and the methodologies used to assess the mission's performance, are of interest to other future CMB mission design studies. CORE has 19 frequency channels, distributed over a broad frequency range, spanning the 60-600 GHz interval, to control astrophysical foreground emission. The angular resolution ranges from 2 to 18 , and the aggregate CMB sensitivity is about 2 µK.arcmin. The observations are made with a single integrated focal-plane instrument, consisting of an array of 2100 cryogenically-cooled, linearly-polarised detectors at the focus of a 1.2-m aperture cross-Dragone telescope. The mission is designed to minimise all sources of systematic effects, which must be controlled so that no more than 10 −4 of the intensity leaks into polarisation maps, and no more than about 1% of E-type polarisation leaks into B-type modes. CORE observes the sky from a large Lissajous orbit around the Sun-Earth L2 point on an orbit that offers stable observing conditions and avoids contamination from sidelobe pick-up of stray radiation originating from the Sun, Earth, and Moon. The entire sky is observed repeatedly during four years of continuous scanning, with a combination of three rotations of the spacecraft over different timescales. With about 50% of the sky covered every few days, this scan strategy provides the mitigation of systematic effects and the internal redundancy that are needed to convincingly extract the primordial B-mode signal on large angular scales, and check with adequate sensitivity the consistency of the observations in several independent data subsets. CORE is designed as a "near-ultimate" CMB polarisation mission which, for optimal complementarity with ground-based observations, will perform the observations that are known to be essential to CMB polarisation science and cannot be obtained by any other means than a dedicated space mission. It will provide well-characterised, highly-redundant multi-frequency observations of polarisation at all the scales where foreground emission and cosmic variance dominate the final uncertainty for obtaining precision CMB science, as well as 2 angular resolution maps of high-frequency foreground emission in the 300-600 GHz frequency range, essential for complementarity w...

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Section: Cooling Chainmentioning

confidence: 99%

Exploring cosmic origins with CORE: Survey requirements and mission design

Delabrouille

Bernardis

Bouchet

et al. 2018

J. Cosmol. Astropart. Phys.

Self Cite

158

161

View full text Add to dashboard Cite

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“…Indeed, cryostats and dilutions refrigerators, which are typically used on ground in quantum experiments, cause vibrations, especially when one needs to reach low temperatures [726,727]. Additionally, keeping liquid helium in a container in a gravity free environment is a challenge on its own because dewars (Thermos bottles) function due to gravity, enabling the liquid and gas to naturally separate.…”

Section: Maintaining Vacuum and Environmental Temperaturementioning

confidence: 99%

Quantum Physics in Space

Belenchia,

Carlesso,

Bayraktar

et al. 2021

Preprint

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Advances in quantum technologies are giving rise to a revolution in the way fundamental physics questions are explored at the empirical level. At the same time, they are the seeds for future disruptive technological applications of quantum physics. Remarkably, a space-based environment may open many new avenues for exploring and employing quantum physics and technologies. Recently, space missions employing quantum technologies for fundamental or applied studies have been proposed and implemented with stunning results.The combination of quantum physics and its space application is the focus of this review: we cover both the fundamental scientific questions that can be tackled with quantum technologies in space and the possible implementation of these technologies for a variety of academic and commercial purposes.

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