Dr. Yuying Longval Profile

Dr. Yuying Longval

at IAS/CNRS

SPIE Involvement:

Author

Publications (15)

Proceedings Article | 12 July 2019 Open Access

Open Access

Paper

PILOT optical alignment

B. Mot, G. Roudil, Y. Longval, P. Ade, Y. André, J. Aumont, L. Baustista, J. -P. Bernard, N. Bray, P. de Bernardis, O. Boulade, F. Bousquet, M. Bouzit, V. Buttice, A. Caillat, M. Charra, M. Chaigneau, B. Crane, J. -P. Crussaire, F. Douchin, E. Doumayrou, J. -P. Dubois, C. Engel, P. Etcheto, P. Gélot, M. Griffin, G. Foenard, S. Grabarnik, P. Hargrave, A. Hughes, R. Laureijs, Y. Lepennec, B. Leriche, S. Maestre, B. Maffei, J. Martignac, C. Marty, W. Marty, S. Masi, F. Mirc, R. Misawa, J. Montel, L. Montier, J. Narbonne, J. -P. Nicot, F. Pajot, G. Parot, E. Pérot, J. Pimentao, G. Pisano, N. Ponthieu, I. Ristorcelli, L. Rodriguez, M. Salatino, G. Savini, O. Simonella, M. Saccoccio, P. Tapie, J. Tauber, J. -P. Torre, C. Tucker

Proceedings Volume 11180, 111806Z (2019) https://doi.org/10.1117/12.2536170

KEYWORDS: Mirrors, Optical alignment, Telescopes, Thermal modeling, Galactic astronomy, Polarization, Off axis mirrors, Image quality, Photometry, Point spread functions

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Proceedings Article | 13 April 2018 Paper

Paper

PLANCK-HFI: performances of an optical concept for the cosmic microwave background anisotropies measurement

J. Brossard, V. Yurchenko, E. Gleeson, Y. Longval, B. Maffei, A. Murphy, Isabelle Ristorcelli, J.-M. Lamarre

Proceedings Volume 10568, 105682E (2018) https://doi.org/10.1117/12.2500109

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PLANCK is a project of the European Space Agency to be launched in February 2007 by an ArianeV rocket with the Herschel Space Observatory . It is designed for imaging the temperature and polarization anisotropies of the millimetre and submillimetre radiation over the whole sky with unprecedented sensitivity, accuracy and angular resolution using 9 frequency channels ranging between 25 and 1000 GHz. The main source at these frequencies is the Cosmic Microwave Background (CMB), i.e. the radiation emitted by the early universe when, about 300000 years old, ionised hydrogen recombined and became transparent from the visible to radio frequencies of the electromagnetic spectrum. The main goal of the PLANCK mission is to retrieve the main cosmological parameters of the Universe with accuracies of a few percent from the observation and analysis of random small contrast (10–4) features in the CMB. The angular power spectrum of the CMB anisotropies is a function of the fundamental cosmological parameters. A proper measurement of all the angular frequencies of the CMB is essential for an accurate interpretation of the data. In consequence the optical performances of Planck will directly impact the ability of retrieving theses parameters. Recent results of the Willkinson Microwave Anisotropy Probe (WMAP) mission show that polarization information of CMB radiation is very challenging, and that the precise measurement of the CMB could completely change the knowledge we have on our universe ([1]). The focal plane assembly (FPA) of the PLANCK telescope is composed of two instruments. The High Frequency Instrument (HFI) of PLANCK is the most sensitive CMB experiment ever planned ([2]). Together with the Low Frequency Instrument (LFI), this will make a unique tool to measure the full sky and to separate various components of its spectrum. This paper describes the main performances of the HFI beams and compares results obtained with 2 different softwares: GRASP8 [3] and an home-made software developed at the Ireland National University of Maynooth [4]. Specials attention will be paid to polarized beams (100, 143, 217, 353 GHz) and multimoded channels (545 and 857 GHz).

Proceedings Article | 20 November 2017 Open Access

Open Access

Paper

Pilot, a balloon borne experiment underground tests

C. Engel, C. Marty, B. Mot, J.-Ph. Bernard, I. Ristorcelli, G. Otrio, B. Leriche, Y. Longval, F. Pajot, G. Roudil, A. Caillat, J. Dubois, M. Bouzit, V. Buttice, T. Camus

Proceedings Volume 10565, 1056506 (2017) https://doi.org/10.1117/12.2309168

KEYWORDS: Mirrors, Photometry, Image quality, 3D metrology, Polarizers, Polarization, Temperature metrology, Collimation, Astronomical imaging, Wave plates

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Proceedings Article | 17 November 2017 Open Access

Open Access

Paper

Instrumental polarization modelling for the PILOT submm experiment

C. Engel, Jean-Philippe Bernard, G. Otrio, Y. Longval, C. Marty, Isabelle Ristorcelli

Proceedings Volume 10563, 105635T (2017) https://doi.org/10.1117/12.2304136

KEYWORDS: Polarization, Mirrors, Telescopes, Space telescopes, Reflection, Modeling, Tolerancing, Dielectric polarization, Lenses, Astronomical imaging

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Proceedings Article | 17 November 2017 Open Access

Open Access

Paper

PILOT: optical performance and end-to-end characterisation

Y. Longval, R. Misawa, P. Ade, Y. André, P. de Bernardis, F. Bousquet, M. Bouzit, V. Buttice, M. Charra, B. Crane, J. Dubois, C. Engel, M. Griffin, P. Hargrave, B. Leriche, S. Maestre, C. Marty, W. Marty, S. Masi, B. Mot, J. Narbonne, F. Pajot, G. Pisano, N. Ponthieu, I. Ristorcelli, L. Rodriguez, G. Roudil, O. Simonella, M. Salatino, G. Savini, C. Tucker, J.-P. Bernard

Proceedings Volume 10563, 105635X (2017) https://doi.org/10.1117/12.2304278

KEYWORDS: Point spread functions, Polarization, Mirrors, Photometry, Polarizers, Collimators, Sensors, Optical testing, Space telescopes, Telescopes

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PILOT (Polarized Instrument for the Long-wavelength Observations of the Tenuous ISM), is a balloon-borne astronomy experiment dedicated to study the polarization of dust emission from the diffuse ISM in our Galaxy [1]. The observations of PILOT have two major scientific objectives. Firstly, they will allow us to constrain the large-scale geometry of the magnetic field in our Galaxy and to study in details the alignment properties of dust grains with respect to the magnetic field. In this domain, the measurements of PILOT will complement those of the Planck satellite at longer wavelengths. In particular, they will bring information at a better angular resolution, which is critical in crowded regions such as the Galactic plane. They will allow us to better understand how the magnetic field is shaping the ISM material on large scale in molecular clouds, and the role it plays in the gravitational collapse leading to star formation. Secondly, the PILOT observations will allow us to measure for the first time the polarized dust emission towards the most diffuse regions of the sky, where the measurements are the most easily interpreted in terms of the physics of dust. In this particular domain, PILOT will play a role for future CMB missions similar to that played by the Archeops experiment for Planck. The results of PILOT will allow us to gain knowledge about the magnetic properties of dust grains and about the structure of the magnetic field in the diffuse ISM that is necessary to a precise foreground subtraction in future polarized CMB measurements. The PILOT measurements, combined with those of Planck at longer wavelengths, will therefore allow us to further constrain the dust models. The outcome of such studies will likely impact the instrumental and technical choices for the future space missions dedicated to CMB polarization.

The PILOT instrument will allow observations in two photometric channels at wavelengths 240 μm and 550 μm, with an angular resolution of a few arcminutes. We will make use of large format bolometer arrays, developed for the PACS instrument on board the Herschel satellite. With 1024 detectors per photometric channel and photometric band optimized for the measurement of dust emission, PILOT is likely to become the most sensitive experiment for this type of measurements. The PILOT experiment will take advantage of the large gain in sensitivity allowed by the use of large format, filled bolometer arrays at frequencies more favorable to the detection of dust emission.

This paper presents the optical design, optical characterization and its performance. We begin with a presentation of the instrument and the optical system and then we summarise the main optical tests performed. In section III, we present preliminary end-to-end test results.

Proceedings Article | 25 September 2017 Open Access

Open Access

Paper

Pilot optical alignment and its in flight performances

B. Mot, Y. Longval, P. Ade, Y. André, J. Aumont, L. Baustista, J.-Ph. Bernard, N. Bray, P. de Bernardis, O. Boulade, F. Bousquet, M. Bouzit, V. Buttice, A Caillat, M. Charra, M. Chaigneau, C. Coudournac, B. Crane, J.-P. Crussaire, F. Douchin, E. Doumayrou, J. Dubois, C. Engel, P. Etcheto, P. Gélot, M. Griffin, G. Foenard, S. Grabarnik, P. Hargrave, A. Hughes, R. Laureijs, Y. Lepennec, B Leriche, S. Maestre, B. Maffei, J. Martignac, C. Marty, W. Marty, S. Masi, F. Mirc, R. Misawa, J. Montel, L. Montier, J. Narbonne, J.-M. Nicot, F. Pajot, G. Parot, E. Pérot, J. Pimentao, G. Pisano, N. Ponthieu, I. Ristorcelli, L. Rodriguez, G. Roudil, M. Salatino, G. Savini, O. Simonella, M. Saccoccio, P. Tapie, J. Tauber, J.-P. Torre, C. Tucker, G. Versepuech

Proceedings Volume 10562, 105624C (2017) https://doi.org/10.1117/12.2297590

KEYWORDS: Mirrors, Telescopes, Space telescopes, Optical alignment, Photometry, Astronomical imaging, Point spread functions, Thermography, Image quality, Thermal modeling

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Proceedings Article | 29 July 2016 Paper

Paper

PILOT optical alignment

Y. Longval, B. Mot, P. Ade, Y. André, J. Aumont, L. Baustista, J.-Ph. Bernard, N. Bray, P. de Bernardis, O. Boulade, F. Bousquet, M. Bouzit, V. Buttice, A. Caillat, M. Charra, M. Chaigneau, B. Crane, J.-P. Crussaire, F. Douchin, E. Doumayrou, J.-P. Dubois, C. Engel, P. Etcheto, P. Gélot, M. Griffin, G. Foenard, S. Grabarnik, P.. Hargrave, A. Hughes, R. Laureijs, Y. Lepennec, B. Leriche, S. Maestre, B. Maffei, J. Martignac, C. Marty, W. Marty, S. Masi, F. Mirc, R. Misawa, J. Montel, L. Montier, J. Narbonne, J-M. Nicot, F. Pajot, G. Parot, E. Pérot, J. Pimentao, G. Pisano, N. Ponthieu, I. Ristorcelli, L. Rodriguez, G. Roudil, M. Salatino, G. Savini, O. Simonella, M. Saccoccio, P. Tapie, J. Tauber, J.-P. Torre, C. Tucker

Proceedings Volume 9904, 990458 (2016) https://doi.org/10.1117/12.2232892

KEYWORDS: Optical alignment, 3D metrology, Space telescopes, Mirrors, Photometry, Telescopes, Thermography, Spherical lenses, Thermal modeling, Point spread functions

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Proceedings Article | 19 July 2016 Paper

Paper

Inflight performance of the PILOT balloon-borne experiment

J.-Ph. Bernard, P. Ade, Y. André, J. Aumont, L. Bautista, N. Bray, P. de Bernardis, O. Boulade, F. Bousquet, M. Bouzit, V. Buttice, A. Caillat, M. Charra, M. Chaigneau, B. Crane, J.-P. Crussaire, F. Douchin, E. Doumayrou, J. Dubois, C. Engel, P. Etcheto, P. Gélot, M. Griffin, G. Foenard, S. Grabarnik, P. Hargrave, A. Hughes, R. Laureijs, Y. Lepennec, B. Leriche, Y. Longval, S. Maestre, B. Maffei, J. Martignac, C. Marty, W. Marty, S. Masi, F. Mirc, R. Misawa, J. Montel, L. Montier, B. Mot, J. Narbonne, J-M. Nicot, F. Pajot, G. Parot, E. Pérot, J. Pimentao, G. Pisano, N. Ponthieu, I. Ristorcelli, L. Rodriguez, G. Roudil, M. Salatino, G. Savini, O. Simonella, M. Saccoccio, P. Tapie, J. Tauber, J.-P. Torre, C. Tucker

Proceedings Volume 9914, 99140W (2016) https://doi.org/10.1117/12.2231872

KEYWORDS: Polarization, Astronomy, Sensors, Calibration, Staring arrays, Point spread functions, Bolometers, Saturn, Sun, Signal detection

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Proceedings Article | 23 July 2014 Paper

Paper

PILOT: a balloon-borne experiment to measure the polarized FIR emission of dust grains in the interstellar medium

R. Misawa, J-Ph. Bernard, P. Ade, Y. André, P. de Bernardis, M. Bouzit, M. Charra, B. Crane, J. Dubois, C. Engel, M. Griffin, P. Hargrave, B. Leriche, Y. Longval, S. Maes, C. Marty, W. Marty, S. Masi, B. Mot, J. Narbonne, F. Pajot, G. Pisano, N. Ponthieu, I. Ristorcelli, L. Rodriguez, G. Roudil, M. Salatino, G. Savini, C. Tucker

Proceedings Volume 9153, 91531H (2014) https://doi.org/10.1117/12.2055506

KEYWORDS: Polarization, Point spread functions, Bolometers, Sensors, Polarizers, Magnetism, Mirrors, Collimators, Photometry, Galactic astronomy

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Proceedings Article | 27 September 2012 Paper

Paper

The PILOT experiment for the measurement of interstellar dust polarization : the camera ground calibration

V. Buttice, F. Pajot, J.-P. Bernard, M. Bouzit, A. Caillat, B. Crane, M. Chaigneau, J.-P. Dubois, B. Leriche, Y. Longval, C. Marty

Proceedings Volume 8452, 84520U (2012) https://doi.org/10.1117/12.925187

KEYWORDS: Cameras, Polarization, Sensors, Calibration, Spectral calibration, Mirrors, Telescopes, Bolometers, Optical benches, Optical filters

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Proceedings Article | 5 August 2010 Paper

Paper

Optical performance of the JWST/MIRI flight model: characterization of the point spread function at high resolution

P. Guillard, T. Rodet, S. Ronayette, J. Amiaux, A. Abergel, V. Moreau, J. L. Augueres, A. Bensalem, T. Orduna, C. Nehmé, A. Belu, E. Pantin, P.-O. Lagage, Y. Longval, A. C. H. Glasse, P. Bouchet, C. Cavarroc, D. Dubreuil, S. Kendrew

Proceedings Volume 7731, 77310J (2010) https://doi.org/10.1117/12.853591

KEYWORDS: Point spread functions, Sensors, Deconvolution, Zemax, James Webb Space Telescope, Imaging systems, Mirrors, Lawrencium, Fermium, Frequency modulation

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Proceedings Article | 12 July 2008 Paper

Paper

Development approach and first infrared test results of JWST/Mid Infra Red Imager Optical Bench

J. Amiaux, F. Alouadi, J. L. Augueres, P. Bouchet, M. Bouzat, C. Cavarroc, C. Cloue, P. De Antoni, D. Desforges, A. Donati, D. Dubreuil, D. Eppelle, F. Gougnaud, B. Hervieu, P. O. Lagage, D. Leboeuf, I. Le Mer, Y. Lussignol, P. Mattei, F. Meigner, V. Moreau, E. Pantin, P. Perrin, S. Ronayette, G. Tauzin, S. Poupar, D. Wright, A. Glasse, G. Wright, E. Mazy, J. Y. Plesseria, E. Renotte, T. Ray, A. Abergel, P. Guillard, Y. Longval, M. Ressler, J. M. Reess, R. Hofferbert, O. Krause, K. Justtanont, G. Olofsson

Proceedings Volume 7010, 70100U (2008) https://doi.org/10.1117/12.789027

KEYWORDS: Cryogenics, Mirrors, Inspection, Performance modeling, Point spread functions, Image quality, Optical testing, James Webb Space Telescope, Aerospace engineering, Imaging systems

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Proceedings Article | 12 July 2008 Paper

Paper

A wide-field Imaging FTS for the Molecular Hydrogen Explorer space mission (H2EX)

J.-P. Maillard, F. Boulanger, Y. Longval, J.-J. Fourmond, M. Bouzit, C. Dumesnil

Proceedings Volume 7010, 701026 (2008) https://doi.org/10.1117/12.789057

KEYWORDS: Space telescopes, Telescopes, Mirrors, Beam splitters, Interferometers, Fourier transforms, Hydrogen, Spectral resolution, Sensors, Space operations

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Proceedings Article | 12 October 2004 Paper

Paper

Planck-HFI focal plane concept

Bruno Maffei, Peter Ade, James Bock, J. Brossard, Emily Gleeson, Jean-Michel Lamarre, Andrew Lange, Yu-Ying Longval, John Murphy, Giampaolo Pisano, Jean-Loup Puget, I. Ristorcelli, Rashmi Sudiwala, Vladimir Yurchenko

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.552577

KEYWORDS: Sensors, Polarization, Telescopes, Bolometers, Space telescopes, Optical filters, Data modeling, Anisotropy, Antennas, Waveguides

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Proceedings Article | 16 October 1995 Paper

Paper

Polarization characterization of the SUMER instrument on SOHO

Donald Hassler, Philippe Lemaire, Yu-Ying Longval

Proceedings Volume 2517, (1995) https://doi.org/10.1117/12.224925

KEYWORDS: Polarization, Mirrors, Solar radiation, Silicon carbide, Ultraviolet radiation, Observatories, Earth observing sensors, Satellites, Optical components, Holography

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Showing 5 of 15 publications

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