Progress in the Critical Assessment for a Far-Infrared Space Interferometer with Double Fourier Modulation (FP7-FISICA)

Savini, G.; Ade, Peter A. R.; Baccichet, Nicola; Bracken, Colm; Dohlenh, K.; Donohoe, Anthony; Gom, Brad; Griffin, Matt; Holland, W. S.; Iafolla, V.; Ivison, Rob; Jones, Martyn; Juanola-Parramon, Roser; Lightfoot, J. F.; Liu, S. J.; McMillan, Alex; Murphy, John A.; Naylor, David; O’Sullivan, C.; Pascale, Enzo; Pezzutto, Simon; Rakotonimbahy, E.; Schito, D.; Spencer, L. D.; Spinoglio, L.; Swinyard, Bruce; Venendaal, I.; Vivès, S.; Walker, David D.; Leisawitz, David; Shi, Sheng‐Cai; Matsuo, Hiroshi

doi:10.1364/fts.2015.ft4a.3

Cited by 6 publications

(4 citation statements)

References 8 publications

(13 reference statements)

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“…The most demanding science questions translate into the need to spatially resolve astrophysical objects of angular size ≈ 0.1 -0.25 arcseconds at wavelengths ranging from 25 to 200 µm, with a desire to extend the range to 400 µm. This sharp resolution at such long wavelengths requires interferometric baselines up to B = 100 m [13,4]. The wide spectral coverage would be separated into three wavebands: 1) 25 − 50 µm, 2) 50 − 100 µm, 3) 100 − 200 µm, with a possible 4th band of 200 to 400 µm, if feasible.…”

Section: Light Collecting Telescopesmentioning

confidence: 99%

Quasi-optical analysis of a far-infrared spatio-spectral space interferometer concept

Bracken

O'Sullivan

Murphy

et al. 2016

Infrared Physics & Technology

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FISICA (Far-Infrared Space Interferometer Critical Assessment) was a three year study aimed at designing a far-infrared spatio-spectral double-Fourier interferometer concept. This paper describes a two-telescope (and hub) baseline optical design, that fulfills the requirements of the FISICA science case. Due the physical size of far-infrared wavelengths with respect to the size of the required optics, a number of different analysis techniques were required for the design work. Approximate simulation tools such as ray tracing and Gaussian beam mode (GBM) methods were employed for initial analysis, with GRASP PO (physical optics) used for final analysis for higher accuracy. The work builds on previous far-infrared double

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Section: Light Collecting Telescopesmentioning

confidence: 99%

Quasi-optical analysis of a far-infrared spatio-spectral space interferometer concept

Bracken

O'Sullivan

Murphy

et al. 2016

Infrared Physics & Technology

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“…Clearly then, high spatial resolution (sub-arc second) should be our next step in observing at these science-rich, but relatively long wavelengths. FISICA, a three year project that aimed to identify the scientific questions that can be answered with high spatial resolution far-infrared observations, and to translate these questions into a technological definition of a far-infrared space-based mission, 4,5 came to an end in December 2015. Funding for the FISICA study was under the European Commissions's FP7 programme.…”

Section: Fisica (Far-infrared Space Interferometer Critical Assessment)mentioning

confidence: 99%

“…In a previous paper 10 a range of optical layouts were investigated toward identifying an optimal solution for the science requirements of the FISICA study. Table 1 summarises those science requirements, 4,11 and Table 2 details the parameters of the optimised optical layout. 10 Figure 1 shows a physical optics model of the system defined in Table 2. i The FISICA science case called for a wavelength range of λ = 25 − 200 µm, likely split into the three bands shown in Table 1.…”

Section: Fisica Baseline Optical Designmentioning

confidence: 99%

Multimode simulations of a wide field of view double-Fourier far-infrared spatio–spectral interferometer

Bracken

Lightfoot

O'Sullivan

et al. 2018

J. Astron. Telesc. Instrum. Syst.

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In the absence of 50 m class space-based observatories, sub-arc-second astronomy spanning the full far-infrared wavelength range will require space-based long-baseline interferometry. The long baselines of up to 10's of meteres are necessary to achieve sub arcsecond resolution demanded by the science goals. Also, practical observing times command a field of view toward an arc minute or so, not achievable with a single on-axis coherent detector. This paper is concerned with an application of an end-to-end instrument simulator PyFIInS, developed as part of the FISICA project under funding from the European Commission's 7th Framework Programme for Research and Technological Development (FP7). Predicted results of wide field of view spatio-spectral interferometry through simulations of a long-baseline, double-Fourier, far-infrared interferometer concept are presented and analysed. It is shown how such an interferometer, illuminated by a multimode detector can recover a large field of view at sub-arcsecond angular resolution, resulting in similar image quality as that achieved by illuminating the system with an array of coherent detectors. Through careful analysis, the importance of accounting for the correct number of higher-order optical modes is demonstrated, as well as accounting for both orthogonal polarisations. Given that it is very difficult to manufacture waveguide and feed structures at sub-mm wavelengths, the larger multimode design is recommended over the array of smaller single mode detectors. A brief note is provided in the conclusion of this paper, addressing a novel, more elegant solution to modelling far-infrared interferometers, which holds promise for improving the computational efficiency of the simulations presented here.

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“…Specifically, it is part of an EU funded project called FISICA (Far Infrared Space Interferometer Critical Assessment) [4], [5] which has amongst its main objectives the identification of key technologies and requirements for the construction of a state-of-the-art farinfrared space interferometer, based on the design proposed for SPIRIT [6] and FIRI [7].…”

Section: Introductionmentioning

confidence: 99%

Development of a spectral-spatial calibration source for a Far-Infrared interferometer

Baccichet

Savini

2015

2015 8th UK, Europe, China Millimeter Waves and THz Technology Workshop (UCMMT)

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The development of a spectral-spatial calibration source suitable for a double Fourier modulating interferometer at infrared wavelengths, or more generally a thermal IR or spectral imager, is described. In particular a calibrator is being developed by alternating, on the emitting surface, materials of different emissivities. Its characterization and the rationale behind this choice is given, together with some preliminary validation tests. Finally a discussion on the performances and future improvements is provided.

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Progress in the Critical Assessment for a Far-Infrared Space Interferometer with Double Fourier Modulation (FP7-FISICA)

Abstract: SHORT ABSTRACTThe progress and results of the ongoing FP7-FISICA programme to re-asses the scientific goals of a Far-Infrared Space Interfereometer and push the development of some of its key technology elements are reported.

Cited by 6 publications

References 8 publications

Quasi-optical analysis of a far-infrared spatio-spectral space interferometer concept

Quasi-optical analysis of a far-infrared spatio-spectral space interferometer concept

Multimode simulations of a wide field of view double-Fourier far-infrared spatio–spectral interferometer

Development of a spectral-spatial calibration source for a Far-Infrared interferometer

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