Dr. Peter R. Roelfsema Profile

Dr. Peter R. Roelfsema

XIFU/SAFARI-lite senior scientist/project manager at SRON Netherlands Institute for Space Research

SPIE Involvement:

Author

Area of Expertise:

Astronomy , Space research , Instrumentation , Spectroscopy

Websites:

Company Website

Publications (30)

SPIE Journal Paper | 15 November 2024 Open Access

Star and planet formation with the Single Aperture Large Telescope for Universe Studies space observatory

Kamber Schwarz, Alexander Tielens, Joan Najita, Jennifer Bergner, Quentin Kral, Carrie Anderson, Gordon Chin, David Leisawitz, David Wilner, Peter Roelfsema, Floris van der Tak, Erick Young, Chris Walker

JATIS, Vol. 10, Issue 04, 042307, (November 2024) https://doi.org/10.1117/12.10.1117/1.JATIS.10.4.042307

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Proceedings Article | 28 August 2024 Presentation + Paper

The Large Interferometer For Exoplanets (LIFE): a space mission for mid-infrared nulling interferometry

Adrian Glauser, Sascha Quanz, Jonah Hansen, Felix Dannert, Michael Ireland, Hendrik Linz, Olivier Absil, Eleonora Alei, Daniel Angerhausen, Thomas Birbacher, Denis Defrère, Andrea Fortier, Philipp Huber, Jens Kammerer, Romain Laugier, Tim Lichtenberg, Lena Noack, Mohanakrishna Ranganathan, Sarah Rugheimer, Vladimir Airapetian, Yann Alibert, Pedro Amado, Marius Anger, Narsireddy Anugu, Max Aragon, David Armstrong, Amedeo Balbi, Olga Balsalobre-Ruza, Deepayan Banik, Mathias Beck, Surendra Bhattarai, Jonas Biren, Jacopo Bottoni, Marrick Braam, Alexis Brandeker, Lars Buchhave, José Caballero, Juan Cabrera, Ludmila Carone, Óscar Carrión-González, Amadeo Castro-González, Kenny Chan, Ligia Coelho, Tereza Constantinou, Nicolas Cowan, William Danchi, Colin Dandumont, Jeanne Davoult, Arjun Dawn, Jean-Pierre de Vera, Pieter de Visser, Caroline Dorn, Juan Duque Lara, Mark Elowitz, Steve Ertel, Yuedong Fang, Simon Felix, Jonathan Fortney, Malcolm Fridlund, Antonio García Muñoz, Cedric Gillmann, Gregor Golabek, John Lee Grenfell, Greta Guidi, Octavio Guilera, Janis Hagelberg, Janina Hansen, Jacob Haqq-Misra, Nathan Hara, Ravit Helled, Konstantin Herbst, Nina Hernitschek, Sasha Hinkley, Takahiro Ito, Satoshi Itoh, Stavro Ivanovski, Markus Janson, Anders Johansen, Hugh Jones, Stephen Kane, Daniel Kitzmann, Andjelka Kovacevic, Stefan Kraus, Oliver Krause, J. M. Diederik Kruijssen, Rolf Kuiper, Alen Kuriakose, Lucas Labadie, Sylvestre Lacour, Antonino Lanza, Laurits Leedjärv, Monika Lendl, Michaela Leung, Jorge Lillo-Box, Jérôme Loicq, Rafael Luque, Suvrath Mahadevan, Liton Majumdar, Fabien Malbet, Franco Mallia, Joice Mathew, Taro Matsuo, Elisabeth Matthews, Victoria Meadows, Bertrand Mennesson, Michael Meyer, Karan Molaverdikhani, Paul Mollière, John Monnier, Ramon Navarro, Benard Nsamba, Kenshiro Oguri, Apurva Oza, Enric Palle, Carina Persson, Joe Pitman, Eva Plávalová, Francisco Pozuelos, Andreas Quirrenbach, Ramses Ramirez, Ansgar Reiners, Ignasi Ribas, Malena Rice, Berke Vow Ricketti, Peter Roelfsema, Amedeo Romagnolo, María Paula Ronco, Martin Schlecker, Jessica Schonhut-Stasik, Edward Schwieterman, Antranik Sefilian, Eugene Serabyn, Chinmay Shahi, Siddhant Sharma, Laura Silva, Swapnil Singh, Evan Sneed, Locke Spencer, Vito Squicciarini, Johannes Staguhn, Karl Stapelfeldt, Keivan Stassun, Motohide Tamura, Benjamin Taysum, Floris van der Tak, Tim van Kempen, Gautam Vasisht, Haiyang Wang, Robin Wordsworth, Mark Wyatt

Proceedings Volume 13095, 130951D (2024) https://doi.org/10.1117/12.3019090

KEYWORDS: Nulling interferometry, Space operations, Planets, Beam combiners, Exoplanets, Stars, Sensors, Polarization, Telescopes, Observational astronomy

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Proceedings Article | 24 August 2024 Presentation

Single aperture large telescope for universe studies (SALTUS)

Christopher Walker, Jonathan Arenberg, Yuzuru Takashima, Daewook Kim, Daniel Marrone, Gordon Chin, Carrie Anderson, Craig Kulesa, Leon Harding, Peter Roelfsema, Trent Newswander

Proceedings Volume 13092, 130920E (2024) https://doi.org/10.1117/12.3020502

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Proceedings Article | 24 August 2024 Presentation

SAFARI-lite on SALTUS: taking FarIR spectroscopy of the obscured universe to the next level

Peter Roelfsema, Gert de Lange, Wouter Laauwen, Stephen Yates, Jose Silva, Jian-Rong Gao, Floris van der Tak, Erik van der Meer, Ramon Navarro, Jean-Marc Duval, Carole Tucker, Jochem Baselmans, Chris Walker

Proceedings Volume 13092, 130920F (2024) https://doi.org/10.1117/12.3020485

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Proceedings Article | 22 August 2024 Presentation

The X-IFU focal plane assembly development model: microvibrations characterization

Emanuele Taralli, Roland den Hartog, Geert Keizer, Johannes Dercksen, Brian Jackson, Henk van Weers, Jan-Willem den Herder, Pourya Khosropanah, Peter Roelfsema, Damian Audley

Proceedings Volume 13093, 130930Z (2024) https://doi.org/10.1117/12.3018372

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Proceedings Article | 21 August 2024 Presentation + Paper

X-IFU focal plane assembly development model design upgrade and critical technology developments

H. van Weers, J. P. Dercksen, M. Leeman, P. van der Hulst, A. van der Linden, A. Bennebroek, R. den Hartog, P. Khosropanah, B. Jackson, P. Roelfsema

Proceedings Volume 13093, 130930Y (2024) https://doi.org/10.1117/12.3020114

KEYWORDS: Design, Niobium, Adhesives, Sensors, Amplifiers, Wafer bonding, Superconductors, Multiplexing, Magnetism

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Proceedings Article | 21 August 2024 Poster + Paper

The X-IFU focal plane assembly development model: evaluation of the global magnetic shielding factor

E. Taralli, R. den Hartog, J. Dercksen, H. van Weers, P. Khosropanah, J. Van der Kuur, W. Vreeling, M. Audley, G. Keizer, B. Jackson, L. Ferrari, P. Roelfsema, J. W. den Herder

Proceedings Volume 13093, 1309349 (2024) https://doi.org/10.1117/12.3018368

KEYWORDS: Superconducting detectors, Sensors, Detector arrays, Superconductors, X-rays, Cryostats

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This work describes the evaluation of the global shielding factor of the Development Model (DM) of the X-ray Integral Field Unit Focal Plane Assembly (X-IFU FPA) for the Athena X-ray observatory. The main task of the FPA is to provide an environment for the X-ray transition-edge sensors (TESs) microcalorimeter in which they can reach optimal performance, with stringent requirements on the thermal, electro-magnetic, mechanical, and electronic aspects of the environment. Within the FPA a two-stage thermal suspension system will isolate the detectors, operating at nominally 50 mK (T0 stage) from the FPA mechanical interfaces at 2 K (T2 stage). An intermediate temperature stage (T1 stage) operated at nominally 300 mK is implemented as a heat intercept.

The required magnetic shielding attenuation is obtained combining a cryogenic mu-metal (CMM) shield and a superconducting Niobium (Nb) shield. From a finite element model (FEM), the CMM shield alone should suppress the static field (for example Earth magnetic field) at the detector location with a factor 50; while the combination of the two has the goal of suppressing variable fields with a shielding factor of ∼10⁶, defined as the ratio of the magnitude of the external field relative to the maximum field perpendicular to the sensor array. These numbers are referring to the component normal to the plane of the sensor array. In plane with sensor array the shielding factor can be a 10⁴ times larger.

We use the TES detectors as very sensitive magnetometers. The TES critical current I_c exhibits oscillatory Fraunhofer-like behaviour, when magnetic field perpendicular is applied to it. Whether the variable external magnetic field perpendicular to the detectors penetrates the shields, the operating current I_TESthrough the TES, which is stabilised in temperature and biased in a sensitive point in transition, may change and this variation can be used as witness for the shielding factor evaluation.

In this work we discuss the difficulties in performing such a measurement, where a Helmholtz coil outside the cryostat were used to apply an external magnetic field (< 200 μH) in order to avoid any permanent magnetisation of the CMM shield. Both AC and DC external magnetic field have been applied with different orientation respect to the detector plane. This improves the statistic of a very sensitive measurement, but also serves to maximise the signal measured by a number of TESs spread over the south-quadrant (closer to the Nb shield) of the array, where the field lines show different intensity. Preliminary results set a lower limit in the evaluation of the global FPA shielding factor of ∼10⁵. Improvement in the measurement setup and in the analysis will be discussed in view of the future models of the FPA.

Proceedings Article | 23 December 2020 Poster

The SAFARI grating spectrometer for SPICA: Extreme spectroscopic sensitivity in the FAR-IR

Peter Roelfsema, Pieter Dieleman, Willem Jellema, Gert de Lange, Jaap Evers, Shoko Jin, Martin Giard, Francisco Najarro, Charles Bradford, Marc Audard, Stafford Withington, Yasuo Doi, Frank Helmich, Mika Juvela, Franz Kerschbaum, Csaba Kiss, Oliver Krause, Bengt Larsson, David Naylor, Luigi Spinoglio, Ryszard Szczerba, Floris van der Tak, Bart Vandenbussche, Shiang-Yu Wang

Proceedings Volume 11443, 114436W (2020) https://doi.org/10.1117/12.2563140

KEYWORDS: Spectroscopes, Spectroscopy, Sensors, Beam steering, Mirrors, Galactic astronomy, Observatories, Relays, Signal detection, Telescopes

Proceedings Article | 13 December 2020 Poster + Paper

The 4K focal plane unit for SPICA's SAFARI far infrared instrument

Josefina Torres Redondo, Martin Eggens, Rafael García Lopez, Isabel Pérez Grande, Javier Pérez-Alvarez, Marcos Chimeno, David Arrazola Perez, Marianela Fernández, Tomas Belenguer Davila, Luis González Fernandez, Jaap Evers, Pieter Dieleman, Willem Jellema, Peter Roelfsema, Jesús Martin Pintado, Francisco Najarro

Proceedings Volume 11443, 114436I (2020) https://doi.org/10.1117/12.2561336

KEYWORDS: Far infrared, Spectroscopy, Astronomy, Spectroscopes, Analytical research, Cryogenics, Optical design, Fourier transforms

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Proceedings Article | 13 December 2020 Presentation

The joint infrared space observatory SPICA: unveiling the obscured universe

Peter Roelfsema, Hiroshi Shibai, Hidehiro Kaneda, Marc Sauvage, Martin Giard, Francisco Najarro, Charles Bradford, Toru Yamada, Jan Tauber, Marc Audard, Pieter Dieleman, Yasuo Doi, David Elbaz, Matt Griffin, Frank Helmich, Astrid Heske, Mitsuhiko Honda, Willem Jellema, Shoko Jin, Mika Juvela, Inga Kamp, Franz Kerschbaum, Csaba Kiss, Kotaro Kohno, Oliver Krause, Gert de Lange, Bengt Larsson, Jesus Martin-Pintado, Hideo Matsuhara, Takao Nakagawa, Tohru Nagao, David Naylor, Hideko Nomura, Hiroyuki Ogawa, Takashi Onaka, Jacques Rouquet, Luigi Spinoglio, Ryszard Szczerba, Floris van der Tak, Bart Vandenbussche, Shiang-Yu Wang, Stafford Withington

Proceedings Volume 11443, 1144325 (2020) https://doi.org/10.1117/12.2562946

KEYWORDS: Infrared Space Observatory, Sensors, Telescopes, Spectroscopes, Imaging systems, Liquids, Cryogenics, Observatories, Ions, Molecules

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Proceedings Article | 10 July 2018 Presentation

SPICA: a joint infrared space observatory (Conference Presentation)

Peter Roelfsema, Hiroshi Shibai, Kees Wafelbakker, Gert de Lange, Martin Giard, Francisco Najarro, Marc Audard, Lee Armus, Charles Bradford, Yasuo Doi, Matt Griffin, Frank Helmich, Inga Kamp, Hidehiro Kaneda, Ciska Kemper, Franz Kerschbaum, Kotaro Kohno, Oliver Krause, Bengt Larsson, Sue Madden, Hideo Matsuhara, Takao Nakagawa, David Naylor, Hiroyuki Ogawa, Takashi Onaka, Luigi Spinoglio, Floris van der Tak, Bart Vandenbussche, Toru Yamada

Proceedings Volume 10698, 106980A (2018) https://doi.org/10.1117/12.2313124

KEYWORDS: Space telescopes, Telescopes, Infrared Space Observatory, Planetary systems, Infrared radiation, Infrared telescopes, Galaxy evolution, Sensors, Cryogenics, Spectroscopes

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Measurements in the infrared wavelength domain allow us to assess directly the physical state and energy balance of cool matter in space, thus enabling the detailed study of the various processes that govern the formation and early evolution of stars and planetary systems in the Milky Way and of galaxies over cosmic time. Previous infrared missions, from IRAS to Herschel, have revealed a great deal about the obscured Universe, but sensitivity has been limited because up to now it has not been possible to fly a telescope that is both large and cold. Such a facility is essential to address key astrophysical questions, especially concerning galaxy evolution and the development of planetary systems. SPICA is a mission concept aimed at taking the next step in mid- and far-infrared observational capability by combining a large and cold telescope with instruments employing state-of-the-art ultra-sensitive detectors. The mission concept foresees a 2.5-meter diameter telescope cooled to below 8 K. Rather than using liquid cryogen, a combination of passive cooling and mechanical coolers will be used to cool both the telescope and the instruments. With cooling not dependent on a limited cryogen supply, the mission lifetime can extend significantly beyond the required three years. The combination of low telescope background and instruments with state-of-the-art detectors means that SPICA can provide a huge advance on the capabilities of previous missions. The SPICA instrument complement offers spectral resolving power ranging from ~50 through 11000 in the 17-230 µm domain as well as ~28.000 spectroscopy between 12 and 18 µm. Additionally, SPICA will be capable of efficient 30-37 µm broad band mapping, and small field spectroscopic and polarimetric imaging in the 100-350 µm range. SPICA will enable far infrared spectroscopy with an unprecedented sensitivity of ~5x10-20 W/m2 (5σ/1hr) - at least two orders of magnitude improvement over what has been attained to date. With this exceptional leap in performance, new domains in infrared astronomy will become accessible, allowing us, for example, to unravel definitively galaxy evolution and metal production over cosmic time, to study dust formation and evolution from very early epochs onwards, and to trace the formation history of planetary systems.

Proceedings Article | 10 July 2018 Presentation

The SAFARI grating spectrometer for the SPICA space observatory (Conference Presentation)

Gerhard de Lange, Peter Roelfsema, Martin Giard, Francisco Najarro, Kees Wafelbakker, Willem Jellema, Brian Jackson, Marc Audard, Matt Griffin, Franz Kerschbaum, David Naylor, Albrecht Poglitch, Matt Bradford, Bart Vandenbussche

Proceedings Volume 10708, 107081N (2018) https://doi.org/10.1117/12.2313468

KEYWORDS: Spectroscopy, Space observatories, Far infrared, Space telescopes, Astrophysics, Sensors, Infrared telescopes, Telescopes, Infrared spectroscopy, Spectrometer engineering

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Proceedings Article | 9 July 2018 Paper

The optical design of a far infrared spectrometer for SPICA: grating modules evaluation

David Arrazola, Marianela Fernández, Luis Miguel González Fernández, Tomás Belenguer, Willem Jellema, García Rafael, Josefina Torres, Gert de Lange, Jaap Evers, Martin Eggens, Francisco Najarro, Peter Roelfsema

Proceedings Volume 10708, 107083G (2018) https://doi.org/10.1117/12.2315971

KEYWORDS: Mirrors, Cameras, Collimators, Distortion, Spectroscopy, Sensors

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Proceedings Article | 9 July 2018 Presentation + Paper

The SAFARI detector system

Michael Audley, Gert de Lange, Jian-Rong Gao, Brian Jackson, Richard Hijmering, Marcel Ridder, Marcel Bruijn, Peter Roelfsema, Peter A. Ade, Stafford Withington, Charles Bradford, Neal Trappe

Proceedings Volume 10708, 107080K (2018) https://doi.org/10.1117/12.2313361

KEYWORDS: Sensors, Bolometers, Spectroscopy, Multiplexing, Space telescopes, Spectroscopes, Spectral resolution, Electronics

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Proceedings Article | 17 November 2017 Open Access

Spica-Safari reference optical design

Carmen Pastor, Pablo Zuluaga, Willem Jellema, Luis Miguel González Fernández, Tomas Belenguer, Josefina Torres Redondo, Peter Paul Kooijman, Francisco Najarro, Martin Eggens, Peter Roelfsema, Takao Nakagawa

Proceedings Volume 10563, 105634K (2017) https://doi.org/10.1117/12.2304183

KEYWORDS: Mirrors, Fourier transforms, Optical design, Interferometers, Space telescopes, Telescopes, Diffraction, Cameras, Image transmission, Interfaces

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Proceedings Article | 17 November 2017 Open Access

Safari: instrument design of the far-infrared imaging spectrometer for spica

W. Jellema, C. Pastor, D. Naylor, B. Jackson, B. Sibthorpe, P. Roelfsema

Proceedings Volume 10563, 105631K (2017) https://doi.org/10.1117/12.2304105

KEYWORDS: Sensors, Fourier transforms, Space telescopes, Telescopes, Spectroscopy, Mirrors, Magnetism, Astronomical imaging, Staring arrays, Interferometers

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The next great leap forward in space-based far-infrared astronomy will be made by the Japanese-led SPICA mission, which is anticipated to be launched late 2020’s as the next large astrophysics mission of JAXA, in partnership with ESA and with key European contributions. Filling in the gap between JWST and ALMA, the SPICA mission will study the evolution of galaxies, stars and planetary systems. SPICA will utilize a deeply cooled 3m-class telescope, provided by European industry, to realize zodiacal background limited performance, high spatial resolution and large collecting area.

Making full advantage of the deeply cooled telescope (<6K), the SAFARI instrument on SPICA is a highly sensitive wide-field imaging photometer and spectrometer operating in the 34-210 μm wavelength range. Utilizing Nyquist-sampled focal-plane arrays of very sensitive Transition Edge Sensors (TES), SAFARI will offer a photometric imaging (R ≈ 2), and a low (R = 100) and medium resolution (R = 2000 at 100 μm) imaging spectroscopy mode in three photometric bands within a 2’x2’ instantaneous FoV by means of a cryogenic Mach-Zehnder Fourier Transform Spectrometer.

In this paper we will provide an overview of the SAFARI instrument design and system architecture. We will describe the reference design of the SAFARI focal- plane unit, the implementation of the various optical instrument functions designed around the central large-stroke FTS system, the photometric band definition and out-of-band filtering by quasioptical elements, the control of straylight, diffraction and thermal emission in the long-wavelength limit, and how we interface to the large-format FPA arrays at one end and the SPICA telescope assembly at the other end.

We will briefly discuss the key performance drivers with special emphasis on the optical techniques adopted to overcome issues related to very low background operation of SAFARI. A summary and discussion of the expected instrument performance and an overview of the astronomical capabilities finally conclude the paper.

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Proceedings Article | 29 July 2016 Paper

SAFARI optical system architecture and design concept

Carmen Pastor, Willem Jellema, Pablo Zuluaga-Ramírez, David Arrazola, M. Fernández-Rodriguez, Tomás Belenguer, Luis González Fernández, Michael Audley, Jaap Evers, Martin Eggens, Josefina Torres Redondo, Francisco Najarro, Peter Roelfsema

Proceedings Volume 9904, 99043U (2016) https://doi.org/10.1117/12.2232786

KEYWORDS: Spectral resolution, Space telescopes, Telescopes, Optical design, Space telescopes, Mirrors, Diffraction gratings, Interferometers, Sensors, Lawrencium, Polarization

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Proceedings Article | 28 August 2014 Paper

A large-stroke cryogenic imaging FTS system for SPICA-Safari

Willem Jellema, Dennis van Loon, David Naylor, Peter Roelfsema

Proceedings Volume 9143, 91434A (2014) https://doi.org/10.1117/12.2056778

KEYWORDS: Fourier transforms, Sensors, Magnetism, Mirrors, Cryogenics, Interferometers, Actuators, Imaging systems, Control systems, Resistance

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Proceedings Article | 28 August 2014 Paper

The optical design of a far infrared imaging FTS for SPICA

Proceedings Volume 9143, 91434B (2014) https://doi.org/10.1117/12.2056791

KEYWORDS: Mirrors, Fourier transforms, Interferometers, Optical design, Telescopes, Cameras, Space telescopes, Diffraction, Far infrared, Image transmission

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Proceedings Article | 2 August 2014 Paper

SAFARI new and improved: extending the capabilities of SPICA's imaging spectrometer

Peter Roelfsema, Martin Giard, Francisco Najarro, Kees Wafelbakker, Willem Jellema, Brian Jackson, Bruce Sibthorpe, Marc Audard, Yasuo Doi, Anna di Giorgio, Matthew Griffin, Frank Helmich, Inga Kamp, Franz Kerschbaum, Michael Meyer, David Naylor, Takashi Onaka, Albrecht Poglitch, Luigi Spinoglio, Floris van der Tak, Bart Vandenbussche

Proceedings Volume 9143, 91431K (2014) https://doi.org/10.1117/12.2056449

KEYWORDS: Galactic astronomy, Sensors, Stars, Spectroscopy, Fourier transforms, Space telescopes, Planets, Telescopes, Mirrors, Satellites

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Proceedings Article | 2 August 2014 Paper

The next-generation infrared astronomy mission SPICA under the new framework

Takao Nakagawa, Hiroshi Shibai, Takashi Onaka, Hideo Matsuhara, Hidehiro Kaneda, Yasuhiro Kawakatsu, Peter Roelfsema

Proceedings Volume 9143, 91431I (2014) https://doi.org/10.1117/12.2055947

KEYWORDS: Galactic astronomy, Planets, Telescopes, Space telescopes, Stars, Mid-IR, Infrared astronomy, Astronomy, Infrared telescopes, Spectroscopy

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Proceedings Article | 21 September 2012 Paper

The SAFARI imaging spectrometer for the SPICA space observatory

Peter Roelfsema, Martin Giard, Francisco Najarro, Kees Wafelbakker, Willem Jellema, Brian Jackson, Bruce Swinyard, Marc Audard, Yasuo Doi, Matt Griffin, Frank Helmich, Franz Kerschbaum, Michael Meyer, David Naylor, Hans Nielsen, Göran Olofsson, Albrecht Poglitsch, Luigi Spinoglio, Bart Vandenbussche, Kate Isaak, Javier Goicoechea

Proceedings Volume 8442, 84420R (2012) https://doi.org/10.1117/12.927010

KEYWORDS: Sensors, Galactic astronomy, Stars, Fourier transforms, Satellites, Telescopes, Planets, Spectroscopy, Space telescopes, Spectroscopes

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Proceedings Article | 28 July 2008 Paper

ESPRIT: a study concept for a far-infrared interferometer in space

W. Wild, Th. de Graauw, F. Helmich, A. Baryshev, J. Cernicharo, J. Gao, A. Gunst, A. Bos, J.-W. den Herder, B. Jackson, V. Koshelets, H.-J. Langevelde, P. Maat, J. Martin-Pintado, J. Noordam, P. Roelfsema, L. Venema, P. Wesselius, P. Yagoubov

Proceedings Volume 7013, 70132R (2008) https://doi.org/10.1117/12.789603

KEYWORDS: Space telescopes, Telescopes, Optical correlators, Terahertz radiation, Heterodyning, Interferometers, Satellites, Spatial resolution, Spectral resolution, Stars

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Proceedings Article | 12 July 2008 Paper

The Herschel-Heterodyne Instrument for the Far-Infrared (HIFI): instrument and pre-launch testing

7010-5Thijs de Graauw, Nick Whyborn, Frank Helmich, Pieter Dieleman, Peter Roelfsema, Emmanuel Caux, Tom Phillips, Jürgen Stutzki, Douwe Beintema, Arnold Benz, Nicolas Biver, Adwin Boogert, Francois Boulanger, Sergey Cherednichenko, Odile Coeur-Joly, Claudia Comito, Emmanuel Dartois, Albrecht de Jonge, Gert de Lange, Ian Delorme, Anna DiGiorgio, Luc Dubbeldam, Kevin Edwards, Michael Fich, Rolf Güsten, Fabrice Herpin, Netty Honingh, Robert Huisman, Herman Jacobs, Willem Jellema, Jon Kawamura, Do Kester, Teun Klapwijk, Thomas Klein, Jacob Kooi, Jean-Michel Krieg, Carsten Kramer, Bob Kruizenga, Wouter Laauwen, Bengt Larsson, Christian Leinz, Rene Liseau, Steve Lord, Willem Luinge, Anthony Marston, Harald Merkel, Rafael Moreno, Patrick Morris, Anthony Murphy, Albert Naber, Pere Planesas, Jesus Martin-Pintado, Micheal Olberg, Piotr Orleanski, Volker Ossenkopf, John Pearson, Michel Perault, Sabine Phillip, Mirek Rataj, Laurent Ravera, Paolo Saraceno, Rudolf Schieder, Frank Schmuelling, Ryszard Szczerba, Russell Shipman, David Teyssier, Charlotte Vastel, Huib Visser, Klaas Wildeman, Kees Wafelbakker, John Ward, Roonan Higgins, Henri Aarts, Xander Tielens, Peer Zaal

Proceedings Volume 7010, 701004 (2008) https://doi.org/10.1117/12.788659

KEYWORDS: Spectrometers, Astronomy, Acousto-optics, Switches, Stars, Oscillators, Calibration, Heterodyning, Spectral resolution, Signal processing

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Proceedings Article | 7 July 2006 Paper

ESPRIT: a space interferometer concept for the far-infrared

W. Wild, Th. de Graauw, F. Helmich, J. Cernicharo, A. Gunst, A. Bos, J.-W. den Herder, B. Jackson, H.-J. Langevelde, P. Maat, J. Martin-Pintado, J. Noordam, A. Quirrenbach, P. Roelfsema, L. Venema, P. Wesselius, P. Yagoubov

Proceedings Volume 6265, 62651Z (2006) https://doi.org/10.1117/12.672012

KEYWORDS: Optical correlators, Terahertz radiation, Space telescopes, Satellites, Interferometers, Telescopes, Heterodyning, Spatial resolution, Receivers, Signal detection

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Proceedings Article | 12 October 2004 Paper

Exploratory Submm Space Radio-Interferometric Telescope (ESPRIT)

Thijs de Graauw, J. Cernicharo, Wolfgang Wild, A. Bos, Jaap Bregman, Luigi D'Arcio, Jan-Willem den Herder, A. Gunst, F. Helmich, Brian Jackson, P. Maat, Jesus Martin-Pintado, Jan Noordam, Andreas Quirrenbach, Peter Roelfsema, Lars Venema, Paul Wesselius, Pavel Yagoubov

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.552610

KEYWORDS: Interferometers, Space telescopes, Heterodyning, Receivers, Stars, Telescopes, Spatial resolution, Optical correlators, Terahertz radiation, Planets

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Proceedings Article | 6 December 1999 Paper

Operating the ISO-SWS InSb detectors at temperatures above 4 K

Bart Vandenbussche, Mattheus de Graauw, Douwe Beintema, Helmut Feuchtgruber, A. Heras, D. Kester, F. Lahuis, R. Lorente, K. Leech, E. Huygen, P. Morris, Peter Roelfsema, A. Salama, Rens Waters, E. Wieprecht

Proceedings Volume 3759, (1999) https://doi.org/10.1117/12.372695

KEYWORDS: Sensors, Calibration, Helium, Temperature metrology, Stars, Signal detection, Satellites, Telescopes, Infrared radiation, Spectroscopy

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Proceedings Article | 21 August 1998 Paper

In-orbit performance of the ISO short-wavelength spectrometer

Mattheus de Graauw, Helmut Feuchtgruber, Peter Roelfsema, A. Salama, Otto Bauer, Douwe Beintema, D. Boxhoorn, L. Decin, Leo Haser, A. Heras, Rik Huygen, Reinhard Katterloher, D. Kester, D. Kunze, F. Lahuis, K. Leech, C. Lorente, Dieter Lutz, P. Morris, S. Schaeidt, E. Sturm, Edwin Valentijn, Bart Vandenbussche, Rens Waters, E. Wieprecht, E. Wiezorrek, Erick Young

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317249

KEYWORDS: Calibration, Sensors, Spectroscopy, Spectral resolution, Fabry–Perot interferometers, Radiation effects, Scanners, Particles, Astronomy, Crystals

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Proceedings Article | 31 July 1998 Paper

Heterodyne instrument for FIRST (HIFI): preliminary design

Mattheus de Graauw, Nick Whyborn, Herman van de Stadt, Gerard Beaudin, Douwe Beintema, Victor Belitsky, Philippe Cais, Emmanuel Caux, M. Gheudin, Alain Cros, P. de Groene, A. Emrich, Neal Erickson, Todd Gaier, Juan Gallego-Puyol, Jianrong Gao, Paul Hartogh, N. Honingh, J. Horn, K. Jacobs, R. Kruisinga, F. Lura, Alain Lecacheux, Vincenzo Natale, R. Orfei, John Pearson, Thomas Phillips, Peter Roelfsema, Carlo Rosolen, Morvan Salez, Rudolf Schieder, Karl-Friedrich Schuster, Gerhard Schwaab, J. Starsky, Juergen Stutzki, S. Torchinsky, Boris van Leeuwen, Huib Visser, Klaas Wildeman, Stafford Withington, Jonas Zmuidzinas

Proceedings Volume 3357, (1998) https://doi.org/10.1117/12.317368

KEYWORDS: Spectrometers, Mirrors, Oscillators, Polarization, Calibration, Control systems, Telescopes, Heterodyning, Acousto-optics, Optical amplifiers

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Proceedings Article | 3 July 1998 Paper

FIRST ground segment and science operations concept

Otto Bauer, Pierre Estaria, Kenneth King, Goeran Pilbratt, Andy Robson, Peter Roelfsema, Harm Schaap

Proceedings Volume 3349, (1998) https://doi.org/10.1117/12.316501

KEYWORDS: Space operations, Data archive systems, Calibration, Data storage servers, Space telescopes, Databases, Visibility, Far infrared, Heart, Data processing

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