Dr. Roland H. den Hartog Profile

Dr. Roland H. den Hartog

Instrument scientist at SRON Netherlands Institute for Space Research

SPIE Involvement:

Conference Program Committee | Author

Publications (60)

Proceedings Article | 5 October 2023 Presentation + Paper

Silicon pore optics: a mature and adaptable x-ray mirror technology

David Girou, Laurens Keek, Randall Smith, Randall McEntaffer, Roland den Hartog, Marcos Bavdaz, Ivo Ferreira, Nicolas Barrière, Boris Landgraf, Giuseppe Vacanti, Maximilien Collon

Proceedings Volume 12679, 1267905 (2023) https://doi.org/10.1117/12.2677388

KEYWORDS: Silicon, X-ray optics, X-rays, Mirrors, X-ray technology, Reflection gratings, Observatories, Optical gratings, Spectroscopy, Prototyping

Read Abstract +

Proceedings Article | 31 August 2022 Paper

An AOCS concept for the x-ray interferometer mission

R. den Hartog, P. Uttley, Henk Hoevers, Jan-Willem den Herder, Michael Wise

Proceedings Volume 12181, 121816P (2022) https://doi.org/10.1117/12.2631579

KEYWORDS: Sensors, Nanoimprint lithography, Mirrors

Read Abstract +

Proceedings Article | 26 August 2022 Presentation

The X-IFU focal plane assembly design progress and development model feedback

Henk van Weers, Brian Jackson, Damian Audley, Dennis van Loon, Geert Keizer, Johannes P. Dercksen, Marcel A. van Litsenburg, Nathalie Q. Gorter, Rob Wolfs, Roland den Hartog, Sander van Loon

Proceedings Volume 12181, 121810N (2022) https://doi.org/10.1117/12.2631450

KEYWORDS: Fused deposition modeling, Staring arrays, Sensors, X-rays, Thermometry, Thermal modeling, Performance modeling, Observatories, Multiplexing, Magnetism

Read Abstract +

Proceedings Article | 11 June 2021 Open Access

An X-ray interferometry concept for ESA's Voyage 2050 programme

Roland den Hartog

Proceedings Volume 11852, 118523V (2021) https://doi.org/10.1117/12.2599625

Read Abstract +

Proceedings Article | 13 December 2020 Paper

The development of a testbed for the x-ray interferometry mission

R. den Hartog, P. Uttley, R. Willingale, H. Hoevers, J.-W. den Herder, M. Wise

Proceedings Volume 11444, 114447W (2020) https://doi.org/10.1117/12.2562831

KEYWORDS: X-rays, Interferometry, Interferometers, X-ray technology, Thermography, Spatial resolution, Astronomy, Space operations, X-ray optics, X-ray detectors

Read Abstract +

Proceedings Article | 13 December 2020 Presentation + Paper

An x-ray interferometry concept for the ESA Voyage 2050 programme

Phil Uttley, Roland den Hartog, Cosimo Bambi, Didier Barret, Stefano Bianchi, Michal Bursa, Massimo Cappi, Piergiorgio Casella, Webster Cash, Elisa Costantini, Thomas Dauser, Maria Diaz Trigo, Keith Gendreau, Victoria Grinberg, Jan-Willem den Herder, Adam Ingram, Erin Kara, Sera Markoff, Beatriz Mingo, Francesca Panessa, Katja Poppenhäger, Agata Rózanska, Jiri Svoboda, Ralph Wijers, Richard Willingale, Jörn Wilms, Michael Wise

Proceedings Volume 11444, 114441E (2020) https://doi.org/10.1117/12.2562523

KEYWORDS: X-rays, Interferometry, Interferometers, X-ray imaging, Binary data, X-ray telescopes, Spatial resolution, Space operations, Telescopes, Observatories

Read Abstract +

Proceedings Article | 31 July 2018 Presentation + Paper

The ATHENA X-ray Integral Field Unit (X-IFU)

Didier Barret, Thien Lam Trong, Jan-Willem den Herder, Luigi Piro, Massimo Cappi, Juhani Houvelin, Richard Kelley, J. Miguel Mas-Hesse, Kazuhisa Mitsuda, Stéphane Paltani, Gregor Rauw, Agata Rozanska, Joern Wilms, Simon Bandler, Marco Barbera, Xavier Barcons, Enrico Bozzo, Maria Teresa Ceballos, Ivan Charles, Elisa Costantini, Anne Decourchelle, Roland den Hartog, Lionel Duband, Jean-Marc Duval, Fabrizio Fiore, Flavio Gatti, Andrea Goldwurm, Brian Jackson, Peter Jonker, Caroline Kilbourne, Claudio Macculi, Mariano Mendez, Silvano Molendi, Piotr Orleanski, François Pajot, Etienne Pointecouteau, Frederick Porter, Gabriel Pratt, Damien Prêle, Laurent Ravera, Kosuke Sato, Joop Schaye, Keisuke Shinozaki, Tanguy Thibert, Luca Valenziano, Véronique Valette, Jacco Vink, Natalie Webb, Michael Wise, Noriko Yamasaki, Françoise Douchin, Jean-Michel Mesnager, Bernard Pontet, Alice Pradines, Graziella Branduardi-Raymont, Esra Bulbul, Mauro Dadina, Stefano Ettori, Alexis Finoguenov, Yasushi Fukazawa, Agnieszka Janiuk, Jelle Kaastra, Pasquale Mazzotta, Jon Miller, Giovanni Miniutti, Yael Naze, Fabrizio Nicastro, Salavtore Scioritino, Aurora Simonescu, Jose Miguel Torrejon, Benoit Frezouls, Hervé Geoffray, Philippe Peille, Corinne Aicardi, Jérôme André, Christophe Daniel, Antoine Clénet, Christophe Etcheverry, Emilie Gloaguen, Gilles Hervet, Antoine Jolly, Aurélien Ledot, Irwin Paillet, Roseline Schmisser, Bruno Vella, Jean-Charles Damery, Kevin Boyce, Mike Dipirro, Simone Lotti, Denis Schwander, Stephen Smith, Bert-Joost Van Leeuwen, Henk van Weers, Nicolas Clerc, Beatriz Cobo, Thomas Dauser, Christian Kirsch, Edoardo Cucchetti, Megan Eckart, Philippe Ferrando, Lorenzo Natalucci

Proceedings Volume 10699, 106991G (2018) https://doi.org/10.1117/12.2312409

KEYWORDS: Spectral resolution, X-rays, Sensors, Cryogenics, Optical filters, Wind energy, Electronics, X-ray astronomy, Mirrors, X-ray sources

Read Abstract +

Proceedings Article | 10 July 2018 Presentation

The focal plane assembly for the ATHENA x-ray integral field unit instrument (Conference Presentation)

Brian Jackson, Roland den Hartog, Jan van der Kuur, Henk van Weers, Hiroki Akamatsu, Andrea Argan, Simon Bandler, Marco Barbera, Didier Barret, Marcel Bruijn, James Chervenak, Johannes Dercksen, Flavio Gatti, Herve Geoffray, Luciano Gottardi, Jan-Willem den Herder, Ruud Hoogeveen, Caroline Kilbourne, Mikko Kiviranta, Bert-Joost van Leeuwen, Dennis van Loon, Claudio Macculi, Jean-Michel Mesnager, Phillipe Peille, Luigi Piro, Stephen Smith, Francoise Douchin

Proceedings Volume 10699, 106991O (2018) https://doi.org/10.1117/12.2313980

KEYWORDS: Sensors, X-rays, Staring arrays, X-ray imaging, Environmental sensing, Observatories, Spectral resolution, Superconductors, Electronics, Particles

Read Abstract +

Proceedings Article | 10 July 2018 Presentation

Transition-edge sensor array development for the ATHENA x-ray itegral field unit (Conference Presentation)

Stephen Smith, Joesph Adams, Simon Bandler, James Chervenak, Megan Eckart, Fred Finkbeiner, Richard Kelley, Caroline Kilbourne, Antoine Miniussi, F. Scott Porter, John Sadleir, Kazuhiro Sakai, Nicholas Wakeham, Edward Wassell, Wonsik Yoon, Hiroki Akamatsu, Luciano Gottardi, Roland den Hartog, Brian Jackson, Jan van der Kuur

Proceedings Volume 10699, 106991L (2018) https://doi.org/10.1117/12.2313428

KEYWORDS: X-rays, Sensors, Transition metals, Observatories, Spectral resolution, Multiplexing, Fused deposition modeling, Telescopes, Metals

Read Abstract +

The X-ray integral field unit (X-IFU) proposed for ESA’s Athena X-ray observatory will consist of 3840 transition edge sensor (TES) microcalorimeters optimized for the energy range of 0.2 to 12 keV. The instrument will provide unprecedented spectral resolution of ~ 2.5 eV at energies of up to 7 keV and will accommodate photon fluxes of 10’s mcrab (1000’s cps). Over the past two years the baseline configuration has evolved from the original proposal. The current baseline consists of a uniform large pixel array (LPA) of 5” pixels, AC-biased within their superconducting-to-normal transition and read out using frequency domain multiplexing (FDM). The baseline pixel design is approximately a factor of two times slower than in the original concept. High count-rate accommodation, needed for bright point source observations, is now achieved by defocusing the telescope optic to spread the photons over a larger number of pixels. In this paper we report on Mo/Au TES designs that are being optimized to meet the baseline pixel parameters and performance goals. This includes detailed studies on the optimization of the thermal heat sink and the impact of different TES geometries (including TES size and normal metal feature geometries) on the DC-biased transition shape. We discuss how these geometric effects ultimately impact important performance metrics such as energy resolution, decay time, slew-rate and array scale uniformity. Our Mo/Au TESs have historically been designed and optimized for DC-biased operation, however, the primary readout technology uses an AC drive to bias the TES. Depending upon the drive frequency, the AC bias affects the TES transition shape in two ways. Firstly, due to losses from the bias current coupling to metallic components in close proximity to the TES and secondly introducing fine structure in the transition due to Josephson effects. We present latest pixel design optimizations targeted at mitigating these frequency dependent effects in order to achieve commensurate performance with that obtained in the DC case.

Proceedings Article | 6 July 2018 Presentation + Paper

ATHENA X-IFU thermal filters development status toward the end of the instrument phase-A

Marco Barbera, Ugo Lo Cicero, Luisa Sciortino, Fabio D'Anca, Giuseppe Lo Cicero, Giancarlo Parodi, Salvatore Sciortino, Gregor Rauw, Graziella Branduardi-Raymont, Salvatore Varisco, Salvatore Ferruggia Bonura, Alfonso Collura, Roberto Candia, Gaspare Di Cicca, Paolo Giglio, Antonino Buttacavoli, Francesco Cuttaia, Fabrizio Villa, Massimo Cappi, Thien Lam Trong, Jean-Michel Mesnager, Philippe Peille, Roland den Hartog, Jan Willem den Herder, Brian Jackson, Didier Barret, Luigi Piro

Proceedings Volume 10699, 106991R (2018) https://doi.org/10.1117/12.2314450

KEYWORDS: Sensors, X-rays, X-ray detectors, Space operations, Optical filters, Astrophysics, Thermography, Infrared radiation, Electromagnetism, Infrared sensors

Read Abstract +

Proceedings Article | 6 July 2018 Paper

The performance of the ATHENA X-ray Integral Field Unit

Philippe Peille, Roland den Hartog, Claudio Macculi, Marco Barbera, Simone Lotti, Edoardo Cucchetti, Christian Kirsch, Thomas Dauser, Joern Wilms, Simon Bandler, Stephen Smith, Brian Jackson, Hervé Geoffray, Jean-Michel Mesnager, François Pajot, Didier Barret, Thien Lam-Trong, Jan-Willem den Herder, Luigi Piro

Proceedings Volume 10699, 106994K (2018) https://doi.org/10.1117/12.2313720

KEYWORDS: X-rays, Sensors, Quantum efficiency, Mirrors, Optical filters, Image resolution, Contamination, Electronics, Device simulation, Performance modeling

Read Abstract +

Proceedings Article | 6 July 2018 Paper

Performance of a state-of-the-art DAC system for FDM readout

R. den Hartog, B.-J. van Leeuwen, P. Peille, J. van der Kuur, L. Ravera, D. van Loon, B. Jackson, J.-W. den Herder

Proceedings Volume 10699, 106994Q (2018) https://doi.org/10.1117/12.2312793

KEYWORDS: Instrument modeling, Performance modeling, Sensors, X-ray detectors, X-rays, Multiplexing, Interference (communication), Device simulation

Read Abstract +

Proceedings Article | 17 August 2016 Paper

The Athena X-ray Integral Field Unit (X-IFU)

Didier Barret, Thien Lam Trong, Jan-Willem den Herder, Luigi Piro, Xavier Barcons, Juhani Huovelin, Richard Kelley, J. Miguel Mas-Hesse, Kazuhisa Mitsuda, Stéphane Paltani, Gregor Rauw, Agata Rożanska, Joern Wilms, Marco Barbera, Enrico Bozzo, Maria Teresa Ceballos, Ivan Charles, Anne Decourchelle, Roland den Hartog, Jean-Marc Duval, Fabrizio Fiore, Flavio Gatti, Andrea Goldwurm, Brian Jackson, Peter Jonker, Caroline Kilbourne, Claudio Macculi, Mariano Mendez, Silvano Molendi, Piotr Orleanski, François Pajot, Etienne Pointecouteau, Frederick Porter, Gabriel Pratt, Damien Prêle, Laurent Ravera, Etienne Renotte, Joop Schaye, Keisuke Shinozaki, Luca Valenziano, Jacco Vink, Natalie Webb, Noriko Yamasaki, Françoise Delcelier-Douchin, Michel Le Du, Jean-Michel Mesnager, Alice Pradines, Graziella Branduardi-Raymont, Mauro Dadina, Alexis Finoguenov, Yasushi Fukazawa, Agnieszka Janiuk, Jon Miller, Yaël Nazé, Fabrizio Nicastro, Salvatore Sciortino, Jose Miguel Torrejon, Hervé Geoffray, Isabelle Hernandez, Laure Luno, Philippe Peille, Jérôme André, Christophe Daniel, Christophe Etcheverry, Emilie Gloaguen, Jérémie Hassin, Gilles Hervet, Irwin Maussang, Jérôme Moueza, Alexis Paillet, Bruno Vella, Gonzalo Campos Garrido, Jean-Charles Damery, Chantal Panem, Johan Panh, Simon Bandler, Jean-Marc Biffi, Kevin Boyce, Antoine Clénet, Michael DiPirro, Pierre Jamotton, Simone Lotti, Denis Schwander, Stephen Smith, Bert-Joost van Leeuwen, Henk van Weers, Thorsten Brand, Beatriz Cobo, Thomas Dauser, Jelle de Plaa, Edoardo Cucchetti

Proceedings Volume 9905, 99052F (2016) https://doi.org/10.1117/12.2232432

KEYWORDS: X-rays, Sensors, Spectral resolution, Stars, Electronics, Galactic astronomy, Iron, Calibration, Signal to noise ratio, Staring arrays

Read Abstract +

Proceedings Article | 4 August 2016 Paper

Readout of a 176 pixel FDM system for SAFARI TES arrays

R. Hijmering, R. den Hartog, M. Ridder, A. J. van der Linden, J. van der Kuur, J. R. Gao, B. Jackson

Proceedings Volume 9914, 99141C (2016) https://doi.org/10.1117/12.2231714

KEYWORDS: Fused deposition modeling, Signal detection, Sensors, Bolometers, Inductance, Electronics, Resistance, Resistors, Fluctuations and noise, Semiconducting wafers

Read Abstract +

Proceedings Article | 26 July 2016 Paper

The impact of crosstalk in the X-IFU instrument on Athena science cases

R. den Hartog, P. Peille, T. Dauser, B. Jackson, S. Bandler, D. Barret, T. Brand, J.-W. den Herder, M. Kiviranta, J. van der Kuur, S. Smith, J. Wilms

Proceedings Volume 9905, 99055T (2016) https://doi.org/10.1117/12.2232098

KEYWORDS: Sensors, X-rays, Signal detection, Detector arrays, Bridges, Silicon, Magnetism, X-ray detectors, Manufacturing, Magnetic sensors

Read Abstract +

Proceedings Article | 20 July 2016 Paper

Transition-edge sensor pixel parameter design of the microcalorimeter array for the x-ray integral field unit on Athena

S. Smith, J. Adams, S. Bandler, G. Betancourt-Martinez, J. Chervenak, M. Chiao, M. Eckart, F. Finkbeiner, R. Kelley, C. Kilbourne, A. Miniussi, F. Porter, J. Sadleir, K. Sakai, N. Wakeham, E. Wassell, W. Yoon, D. Bennett, W. Doriese, J. Fowler, G. Hilton, K. Morgan, C. Pappas, C. Reintsema, D. Swetz, J. Ullom, K. Irwin, H. Akamatsu, L. Gottardi, R. den Hartog, B. Jackson, J. van der Kuur, D. Barret, P. Peille

Proceedings Volume 9905, 99052H (2016) https://doi.org/10.1117/12.2231749

KEYWORDS: X-rays, Sensors, Multiplexing, Sensors, Staring arrays, Cryogenics, Helium, Magnetism, Photons, Temperature metrology, Resistance

Read Abstract +

Proceedings Article | 19 July 2016 Paper

TESSIM: a simulator for the Athena-X-IFU

J. Wilms, S. Smith, P. Peille, M. T. Ceballos, B. Cobo, T. Dauser, T. Brand, R. den Hartog, S. Bandler, J. de Plaa, J.-W. den Herder

Proceedings Volume 9905, 990564 (2016) https://doi.org/10.1117/12.2234435

KEYWORDS: Sensors, X-ray detectors, X-rays, Astronomy, Photons, Monte Carlo methods, Device simulation, Resistance, Spatial resolution, Cerium

Read Abstract +

Proceedings Article | 19 July 2016 Paper

The focal plane assembly for the Athena X-ray Integral Field Unit instrument

B. Jackson, H. van Weers, J. van der Kuur, R. den Hartog, H. Akamatsu, A. Argan, S. Bandler, M. Barbera, D. Barret, M. Bruijn, J. Chervenak, J. Dercksen, F. Gatti, L. Gottardi, D. Haas, J.-W. den Herder, C. Kilbourne, M. Kiviranta, T. Lam-Trong, B.-J. van Leeuwen, C. Macculi, L. Piro, S. Smith

Proceedings Volume 9905, 99052I (2016) https://doi.org/10.1117/12.2232544

KEYWORDS: Staring arrays, Sensors, Electronics, X-rays, Sensors, Amplifiers, Magnetic sensors, Magnetism, Multiplexing, Particles, Superconductors

Read Abstract +

Proceedings Article | 19 July 2016 Paper

Optimising the multiplex factor of the frequency domain multiplexed readout of the TES-based microcalorimeter imaging array for the X-IFU instrument on the Athena x-ray observatory

J. van der Kuur, L. G. Gottardi, H. Akamatsu, B. J. van Leeuwen, R. den Hartog, D. Haas, M. Kiviranta, B. J. Jackson

Proceedings Volume 9905, 99055R (2016) https://doi.org/10.1117/12.2232830

KEYWORDS: X-ray imaging, X-rays, Sensors, X-rays, Aluminum, Oxides, Optical filters, Photons, Infrared sensors, Ultraviolet radiation, Thermography

Read Abstract +

Proceedings Article | 18 July 2016 Paper

Preliminary thermal architecture of the X-IFU instrument dewar

Ivan Charles, Christophe Daniel, Jérome André, Lionel Duband, Jean-Marc Duval, Roland den Hartog, Kazuhisa Mitsuda, Keisuke Shinozaki, Henk van Weers, Noriko Yamasaki

Proceedings Volume 9905, 99052J (2016) https://doi.org/10.1117/12.2232710

KEYWORDS: Sensors, Cryogenics, Staring arrays, Particles, Silicon, Electronics, Electrons, Principal component analysis, Satellites, Prototyping

Read Abstract +

Proceedings Article | 18 July 2016 Paper

Observing the WHIM with Athena

T. Brand, J. Wilms, T. Dauser, P. Peille, B. Cobo, M. Ceballos, R. A. den Hartog, J. Kaastra, P. O'Brien, X. Barcons, L. Piro, J.-W. den Herder, D. Barret

Proceedings Volume 9905, 99055F (2016) https://doi.org/10.1117/12.2234442

KEYWORDS: X-rays, Absorption, Signal to noise ratio, Light, Device simulation, Exoplanets, Planets, Stars, Sensors, Mirrors

Read Abstract +

Proceedings Article | 11 July 2016 Paper

Performance assessment of different pulse reconstruction algorithms for the ATHENA X-ray Integral Field Unit

Philippe Peille, Maria Teresa Ceballos, Beatriz Cobo, Joern Wilms, Simon Bandler, Stephen Smith, Thomas Dauser, Thorsten Brand, Roland den Hartog, Jelle de Plaa, Didier Barret, Jan-Willem den Herder, Luigi Piro, Xavier Barcons, Etienne Pointecouteau

Proceedings Volume 9905, 99055W (2016) https://doi.org/10.1117/12.2232011

KEYWORDS: Reconstruction algorithms, X-rays, Sensors, Reconstruction algorithms, X-rays, Resistance, Calibration, Inductance, Matrices, Signal processing, Image resolution, Interference (communication)

Read Abstract +

Proceedings Article | 28 August 2014 Paper

The DCU: the detector control unit for SPICA-SAFARI

Antoine Clénet, Laurent Ravera, Bernard Bertrand, Roland den Hartog, Brian Jackson, Bert-Joost van Leeuven, Dennis van Loon, Yann Parot, Etienne Pointecouteau, Anthony Sournac

Proceedings Volume 9143, 914346 (2014) https://doi.org/10.1117/12.2055740

KEYWORDS: Sensors, Multiplexing, Fused deposition modeling, Feedback signals, Signal processing, Phase shifts, Digital signal processing, Digital electronics, Control systems, Data processing

Read Abstract +

IRAP is developing the warm electronic, so called Detector Control Unit" (DCU), in charge of the readout of the SPICA-SAFARI's TES type detectors. The architecture of the electronics used to readout the 3 500 sensors of the 3 focal plane arrays is based on the frequency domain multiplexing technique (FDM). In each of the 24 detection channels the data of up to 160 pixels are multiplexed in frequency domain between 1 and 3:3 MHz. The DCU provides the AC signals to voltage-bias the detectors; it demodulates the detectors data which are readout in the cold by a SQUID; and it computes a feedback signal for the SQUID to linearize the detection chain in order to optimize its dynamic range. The feedback is computed with a specific technique, so called baseband feedback (BBFB) which ensures that the loop is stable even with long propagation and processing delays (i.e. several µs) and with fast signals (i.e. frequency carriers at 3:3 MHz). This digital signal processing is complex and has to be done at the same time for the 3 500 pixels. It thus requires an optimisation of the power consumption. We took the advantage of the relatively reduced science signal bandwidth (i.e. 20 - 40 Hz) to decouple the signal sampling frequency (10 MHz) and the data processing rate. Thanks to this method we managed to reduce the total number of operations per second and thus the power consumption of the digital processing circuit by a factor of 10. Moreover we used time multiplexing techniques to share the resources of the circuit (e.g. a single BBFB module processes 32 pixels). The current version of the firmware is under validation in a Xilinx Virtex 5 FPGA, the final version will be developed in a space qualified digital ASIC. Beyond the firmware architecture the optimization of the instrument concerns the characterization routines and the definition of the optimal parameters. Indeed the operation of the detection and readout chains requires to properly define more than 17 500 parameters (about 5 parameters per pixel). Thus it is mandatory to work out an automatic procedure to set up these optimal values. We defined a fast algorithm which characterizes the phase correction to be applied by the BBFB firmware and the pixel resonance frequencies. We also defined a technique to define the AC-carrier initial phases in such a way that the amplitude of their sum is minimized (for a better use of the DAC dynamic range).

Proceedings Article | 29 July 2014 Paper

Towards Mo/Au based TES detectors for Athena/X-IFU

Lourdes Fàbrega, Agustín Camón, José Luís Costa-Krämer, Carlos Pobes, María Parra-Borderías, Iván Fernández-Martínez, Rosa Jáudenes, Pedro Cereceda, María Teresa Ceballos, Xavier Barcons, Javier Sesé, Jesús Martín-Pintado, Luciano Gottardi, Marcel Bruijn, Madhu Jambunathan, Roland den Hartog, Jan van der Kuur, Jan-Willem den Herder, Didier Barret

Proceedings Volume 9144, 91445P (2014) https://doi.org/10.1117/12.2056900

KEYWORDS: Sensors, Bismuth, Molybdenum, Gold, X-rays, Resistance, Sputter deposition, X-ray telescopes, Superconductors, Space telescopes

Read Abstract +

Proceedings Article | 25 July 2014 Paper

Requirements for the detectors and read-out of ATHENA X-IFU

R. den Hartog, D. Barret, L. Gottardi, J.-W. den Herder, B. Jackson, P. de Korte, J. van der Kuur, B.-J. van Leeuwen, D. van Loon, A. Nieuwenhuizen, L. Ravera

Proceedings Volume 9144, 91445Q (2014) https://doi.org/10.1117/12.2056434

KEYWORDS: Sensors, Resistance, Image resolution, Photons, Modulation, X-ray detectors, X-rays, Multiplexing, Radon, Detector arrays

Read Abstract +

Proceedings Article | 25 July 2014 Paper

Development of TES-based detectors array for the X-ray Integral Field Unit (X-IFU) on the future x-ray observatory ATHENA

L. Gottardi, H. Akamatsu, D. Barret, M. Bruijn, R. den Hartog, J. den Herder, H. Hoevers, M. Kiviranta, J. van der Kuur, A. J. van der Linden, B. Jackson, M. Jambunathan, M. Ridder

Proceedings Volume 9144, 91442M (2014) https://doi.org/10.1117/12.2056920

KEYWORDS: X-rays, Fused deposition modeling, X-ray detectors, Copper, Sensors, Detector arrays, Observatories, Image resolution, Bismuth, Magnetism

Read Abstract +

Proceedings Article | 24 July 2014 Paper

The X-ray Integral Field Unit (X-IFU) for Athena

Laurent Ravera, Didier Barret, Jan Willem den Herder, Luigi Piro, Rodolphe Clédassou, Etienne Pointecouteau, Philippe Peille, Francois Pajot, Monique Arnaud, Claude Pigot, Lionel Duband, Christophe Cara, Roland den Hartog, Luciano Gottardi, Hiroki Akamatsu, Jan van der Kuur, Henk van Weers, Jelle de Plaa, Claudia Macculi, Simone Lotti, Guido Torrioli, Flavio Gatti, Luca Valenziano, Marco Barbera, Xavier Barcons, María Teresa Ceballos, Lourdes Fàbrega, José Miguel Mas-Hesse, Mathew Page, Phillip Guttridge, Richard Willingale, Stéphane Paltani, Ludovic Genolet, Enrico Bozzo, Gregor Rauw, Etienne Renotte, Jörn Wilms, Christian Schmid

Proceedings Volume 9144, 91442L (2014) https://doi.org/10.1117/12.2055884

KEYWORDS: Sensors, X-rays, Electronics, Particles, Electroluminescent displays, Spectral resolution, Image resolution, X-ray detectors, Photons, Digital electronics

Read Abstract +

Proceedings Article | 24 July 2014 Paper

The DRE: the digital readout electronics for ATHENA X-IFU

Laurent Ravera, Christophe Cara, María Teresa Ceballos, Xavier Barcons, Didier Barret, Rodolphe Clédassou, Antoine Clénet, Beatriz Cobo, Eric Doumayrou, Roland den Hartog, Bert-Joost van Leeuwen, Dennis van Loon, José Miguel Mas-Hesse, Claude Pigot, Etienne Pointecouteau

Proceedings Volume 9144, 91445T (2014) https://doi.org/10.1117/12.2055750

KEYWORDS: Electronics, Digital electronics, X-rays, Sensors, Data processing, Fused deposition modeling, Signal detection, Multiplexing, Spectral resolution, Digital signal processing

Read Abstract +

Proceedings Article | 23 July 2014 Paper

The 160 TES bolometer read-out using FDM for SAFARI

R. Hijmering, R. den Hartog, A. van der Linden, M. Ridder, M. Bruijn, J. van der Kuur, B. van Leeuwen, P. van Winden, B. Jackson

Proceedings Volume 9153, 91531E (2014) https://doi.org/10.1117/12.2056510

KEYWORDS: Bolometers, Fused deposition modeling, Digital filtering, Inductance, Sensors, Magnetism, Capacitors, Resistance, Electronic filtering, Resistors

Read Abstract +

Proceedings Article | 25 September 2012 Paper

A multiplexer for the AC/DC characterization of TES-based bolometers and microcalorimeters

L. Gottardi, H. Akamatsu, M. Bruijn, J.R. Gao, R. den Hartog, R. Hijmering, H. Hoevers, P. Khosropanah, J. van der Kuur, T. van der Linden, M. Lindeman, M. Ridder

Proceedings Volume 8453, 845333 (2012) https://doi.org/10.1117/12.925506

KEYWORDS: Bolometers, Magnetism, Fused deposition modeling, X-rays, Multiplexers, Niobium, Temperature metrology, Amplifiers, Resonators, Superconductors

Read Abstract +

Proceedings Article | 24 September 2012 Paper

Frequency division multiplexed readout of TES detectors with baseband feedback

R. den Hartog, M. Audley, J. Beyer, M. Bruijn, P. de Korte, L. Gottardi, R. Hijmering, B. Jackson, A. Nieuwenhuizen, J. van der Kuur, B.-J. van Leeuwen, D. Van Loon

Proceedings Volume 8452, 84520F (2012) https://doi.org/10.1117/12.925741

KEYWORDS: Sensors, Bolometers, Resistance, Multiplexing, Modulation, Temperature metrology, Radon, Interference (communication), Signal detection, Resistors

Read Abstract +

Proceedings Article | 17 September 2012 Paper

The x-ray microcalorimeter spectrometer onboard Athena

J. den Herder, D. Bagnali, S. Bandler, M. Barbera, X. Barcons, D. Barret, P. Bastia, M. Bisotti, K. Boyce, C. Cara, M. Ceballos, L. Corcione, B. Cobo, L. Colasanti, J. de Plaa, M. DiPirro, W. Doriese, Y. Ezoe, R. Fujimoto, F. Gatti, L. Gottardi, P. Guttridge, R. den Hartog, I. Hepburn, R. Kelley, K. Irwin, Y. Ishisaki, C. Kilbourne, P. A. de Korte, J. van der Kuur, S. Lotti, C. Macculi, K. Mitsuda, T. Mineo, L. Natalucci, T. Ohashi, M. Page, S. Paltani, E. Perinati, L. Piro, C. Pigot, F. Porter, G. Rauw, L. Ravera, E. Renotte, J.-L. Sauvageot, C. Schmid, S. Sciortino, P. Shirron, Y. Takei, G. Torrioli, M. Tsujimoto, L. Valenziano, D. Willingale, C. de Vries, H. van Weers, J. Wilms, N. Yamasaki

Proceedings Volume 8443, 84432B (2012) https://doi.org/10.1117/12.924269

KEYWORDS: Sensors, X-rays, Spectral resolution, Multiplexing, Electronics, Image resolution, Spectroscopy, Spatial resolution, Photons, Temperature metrology

Read Abstract +

Proceedings Article | 29 July 2010 Paper

The x-ray microcalorimeter spectrometer onboard of IXO

J. W. den Herder, R. Kelley, K. Mitsuda, L. Piro, S. Bandler, P. Bastia, K. Boyce, M. Bruin, J. Chervenak, L. Colasanti, W. B. Doriese, M. DiPirro, M. Eckart, Y. Ezoe, E. Figueroa-Feliciano, L. Ferrari, R. Fujimoto, F. Gatti, K. Gendreau, L. Gottardi, R. den Hartog, G. Hilton, H. Hoevers, K. Irwin, Y. Ishisaki, A. Kashani, C. Kilbourne, P. de Korte, J. van der Kuur, C. Macculi, T. Mineo, J. H. Nieland, T. Ohashi, S. Paltani, E. Perinati, F. Porter, P. Shirron, S. Smith, Y. Takei, M. Tashiro, G. Torrioli, M. Tsujimoto, H. van Weers, N. Yamasaki

Proceedings Volume 7732, 77321H (2010) https://doi.org/10.1117/12.856018

KEYWORDS: Sensors, X-rays, Image resolution, Magnetism, Spectroscopy, Spectral resolution, Multiplexing, Cooling systems, Magnetic sensors, Optical filters

Read Abstract +

Proceedings Article | 28 August 2008 Paper

Preliminary results on the internal assessment study of the ESA Cosmic Vision mission PLATO

R. Lindberg, D. Lumb, R. den Hartog, P. Gondoin, N. Rando, M. Fridlund

Proceedings Volume 7097, 70970F (2008) https://doi.org/10.1117/12.793353

KEYWORDS: Stars, Telescopes, Space telescopes, Charge-coupled devices, Point spread functions, Planets, Exoplanets, Space operations, Sensors, Signal to noise ratio

Read Abstract +

Proceedings Article | 28 July 2008 Paper

Earth-like planets: science performance predictions for future nulling interferometry missions

D. Defrère, O. Lay, R. den Hartog, O. Absil

Proceedings Volume 7013, 701321 (2008) https://doi.org/10.1117/12.789393

KEYWORDS: Stars, Planets, Modulation, Clouds, Spectroscopy, Signal to noise ratio, Telescopes, Nulling interferometry, Exoplanets, Interferometers

Read Abstract +

Proceedings Article | 28 July 2008 Paper

High dynamic range interferometric observations of exozodiacal discs: performance comparison between ground, space, and Antarctica

Olivier Absil, Denis Defrère, Vincent Coudé du Foresto, Emmanuel Di Folco, Roland den Hartog, Jean-Charles Augereau

Proceedings Volume 7013, 70134Q (2008) https://doi.org/10.1117/12.790298

KEYWORDS: Stars, Interferometers, Clouds, Interferometry, Device simulation, Nulling interferometry, Telescopes, Space telescopes, Infrared radiation, Sensors

Read Abstract +

Proceedings Article | 27 June 2006 Paper

Status and recent progress of the Darwin mission in the Cosmic Vision program

C. V. M. Fridlund, L. d'Arcio, R. den Hartog, A. Karlsson

Proceedings Volume 6268, 62680R (2006) https://doi.org/10.1117/12.671040

KEYWORDS: Planets, Stars, Space telescopes, Interferometers, Telescopes, Solar system, Modulation, Objectives, Earth's atmosphere, Mirrors

Read Abstract +

Proceedings Article | 27 June 2006 Paper

Infra arcsec, infra mJy astronomy: exoplanetary scene models for exo-Earth detection through IR interferometric nulling

Adrian Belu, Marc Ollivier, Guilaine Lagache, Olivier Germain, Stephen Dunne, Stephane Bonnot, Didier Miras, Rodolphe Krawczyk, Roland den Hartog, Malcolm Fridlund, Christian Erd, Farrokh Vakili

Proceedings Volume 6268, 62680C (2006) https://doi.org/10.1117/12.671674

KEYWORDS: Stars, Planets, Nulling interferometry, Interferometry, Data modeling, Exoplanets, Galactic astronomy, Astronomy, Infrared astronomy, Infrared detectors

Read Abstract +

Proceedings Article | 20 June 2006 Paper

Darwin: a mission overview

A. Karlsson, L. d'Arcio, R. den Hartog, M. Fridlund

Proceedings Volume 6265, 62651O (2006) https://doi.org/10.1117/12.669791

KEYWORDS: Space operations, Interferometers, Modulation, Planets, Stars, Waveguides, Nulling interferometry, Beam splitters, Satellites, Space telescopes

Read Abstract +

Proceedings Article | 20 October 2004 Paper

The simulated detection of low-mass companions with GENIE

Roland den Hartog, Olivier Absil, Philippe Gondoin, Luigi d'Arcio, Pierre Fabry, Lisa Kaltenegger, Rainer Wilhelm, Philippe Gitton, Florence Puech, C. V. Fridlund

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.552563

KEYWORDS: Planets, Modulation, Stars, Signal to noise ratio, Nulling interferometry, Calibration, Signal detection, Phase shift keying, Interferometers, Infrared telescopes

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Darwin-GENIE: a nulling instrument at the VLTI

Philippe Gondoin, Olivier Absil, Roland den Hartog, Rainer Wilhelm, Philippe Gitton, Luigi d'Arcio, Pierre Fabry, Florence Puech, Malcolm Fridlund, Markus Schoeller, Andreas Glindemann, Eric Bakker, Anders Karlsson, Anthony Peacock, S. Volonte, Francesco Paresce, Andrea Richichi

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.549411

KEYWORDS: Interferometers, Stars, Telescopes, Nulling interferometry, Planets, Space telescopes, Clouds, Infrared radiation, L band, Mid-IR

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Influence of atmospheric turbulence on the performance and design of GENIE

Olivier Absil, Roland den Hartog, Philippe Gondoin, Pierre Fabry, Luigi d'Arcio, Rainer Wilhelm, Philippe Gitton, Florence Puech

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.550441

KEYWORDS: Interferometers, Atmospheric turbulence, Dispersion, L band, Nulling interferometry, Telescopes, Wavefronts, Photons, Servomechanisms, Actuators

Read Abstract +

Proceedings Article | 11 October 2004 Paper

STJ narrow field-imaging spectrometer for XEUS

Peter Verhoeve, David Lumb, Anthony Peacock, Guy Brammertz, Roland den Hartog, Didier Martin

Proceedings Volume 5488, (2004) https://doi.org/10.1117/12.552927

KEYWORDS: Tantalum, Sensors, Superconductors, Signal processing, X-rays, Control systems, Spectroscopy, Filtering (signal processing), Analog electronics, Signal detection

Read Abstract +

Proceedings Article | 11 March 2003 Paper

Optimization of array design for TIBr imaging detectors

Roland den Hartog, Alan Owens, Alex Kozorezov, Marcos Bavdaz, Anthony Peacock, Vladimir Gostilo, I. Lisjutin, Sergey Zatoloka

Proceedings Volume 4851, (2003) https://doi.org/10.1117/12.461574

KEYWORDS: Sensors, Photons, Electrodes, Diffusion, Image resolution, Absorption, Near field, Nuclear medicine, Spectroscopy, Thallium

Read Abstract +

Proceedings Article | 11 March 2003 Paper

Noise in a Quatratan-based detector: comparison with superconducting tunnel junctions

Roland den Hartog, Alex Kozorezov, Peter Verhoeve, D. Martin

Proceedings Volume 4851, (2003) https://doi.org/10.1117/12.461571

KEYWORDS: Quasiparticles, Sensors, Superconductors, Scattering, Transistors, Interference (communication), Phonons, X-rays, Metals, Image resolution

Read Abstract +

Proceedings Article | 7 March 2003 Paper

12x10 pixel superconducting tunnel junction array based spectro-photometer of optical astronomy

Didier Martin, Peter Verhoeve, Roland den Hartog, J. de Bruijne, A. Reynolds, Axel van Dordrecht, J. Verveer, Anthony Peacock

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.461013

KEYWORDS: Sensors, Superconductors, Astronomy, Optical filters, Astronomical imaging, Helium, Cameras, Telescopes, Amplifiers, Electronics

Read Abstract +

Proceedings Article | 7 March 2003 Paper

Integration time dependence of tunnel noise and energy resolution of superconducting tunnel junctions

Peter Verhoeve, Roland den Hartog, Alex Kozorezov, Didier Martin, Axel van Dordrecht, J. Wigmore, Anthony Peacock

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.460988

KEYWORDS: Quasiparticles, Electrodes, Sensors, Superconductors, Interference (communication), Absorption, Signal detection, Tantalum, Convolution, Aluminum

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Darwin ground-based European Nulling Interferometer Experiment (GENIE)

Philippe Gondoin, Olivier Absil, C. V. Malcolm Fridlund, Christian Erd, Roland den Hartog, Nicola Rando, Andreas Glindemann, Bertrand Koehler, Rainer Wilhelm, Anders Karlsson, L. Labadie, I. Mann, Anthony Peacock, Andrea Richichi, Zoran Sodnik, Massimo Tarenghi, Sergio Volonte

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458573

KEYWORDS: Interferometers, Stars, Telescopes, Planets, Clouds, Nulling interferometry, Space telescopes, Jupiter, L band, Infrared radiation

Read Abstract +

Proceedings Article | 10 January 2003 Paper

Development of TlBr arrays for hard x- and gamma-ray spectroscopy

Alan Owens, Marcos Bavdaz, Vladimir Gostilo, Roland den Hartog, Alex Kozorezov, I. Lisjutin, Anthony Peacock, Sergey Zatoloka

Proceedings Volume 4784, (2003) https://doi.org/10.1117/12.453819

KEYWORDS: Sensors, Gamma radiation, Nuclear medicine, Photons, Absorption, Near field, Spectroscopy, X-rays, Diffusion, Electrodes

Read Abstract +

SPIE Journal Paper | 1 June 2002

Superconducting tunnel junctions as photon-counting imaging spectrometers from the optical to the x-ray band

Peter Verhoeve, Nicola Rando, Anthony Peacock, Didier Martin, Roland den Hartog

OE, Vol. 41, Issue 06, (June 2002) https://doi.org/10.1117/12.10.1117/1.1475738

KEYWORDS: Sensors, Superconductors, Tantalum, X-rays, Spectral resolution, Cameras, Electrodes, Quasiparticles, Aluminum, Astronomy

Proceedings Article | 25 January 2002 Paper

Large-format distributed readout imaging devices for x-ray imaging spectroscopy

Roland den Hartog, Alex Kozorezov, Didier Martin, G. Brammertz, Peter Verhoeve, Anthony Peacock, Frank Scholze, D. Goldie

Proceedings Volume 4497, (2002) https://doi.org/10.1117/12.454231

KEYWORDS: Lead, Diffusion, Photons, Sensors, X-rays, Electrodes, X-ray imaging, Tantalum, Spectroscopes, Imaging devices

Read Abstract +

Proceedings Article | 16 August 2000 Paper

Development of distributed readout imaging detectors based on superconducting tunnel junctions for UV/optical astronomy

Peter Verhoeve, Roland den Hartog, Didier Martin, Nicola Rando, Anthony Peacock, D. Goldie

Proceedings Volume 4008, (2000) https://doi.org/10.1117/12.395548

KEYWORDS: Sensors, Tantalum, Spectral resolution, Electronics, Superconductors, Quasiparticles, Absorption, Ultraviolet radiation, Image sensors, Sapphire

Read Abstract +

Proceedings Article | 18 July 2000 Paper

Distributed read-out imaging devices for x-ray imaging spectroscopy

Roland den Hartog, Didier Martin, Alex Kozorezov, Peter Verhoeve, Nicola Rando, Anthony Peacock, G. Brammertz, Michael Krumrey, D. Goldie, R. Venn

Proceedings Volume 4012, (2000) https://doi.org/10.1117/12.391559

KEYWORDS: Photons, Diffusion, Niobium, Tantalum, Sensors, X-ray imaging, X-rays, Spatial resolution, Aluminum, Magnetism

Read Abstract +

Proceedings Article | 25 November 1999 Paper

Superconducting tunnel junctions as detectors for UV astronomy

Peter Verhoeve, Anthony Peacock, Didier Martin, Nicola Rando, Abel Poelaert, Roland den Hartog

Proceedings Volume 3764, (1999) https://doi.org/10.1117/12.371081

KEYWORDS: Tantalum, Superconductors, Ultraviolet radiation, Sensors, Sapphire, Ultraviolet astronomy, Absorption, Magnesium fluoride, Astronomy, Quasiparticles

Read Abstract +

Proceedings Article | 29 September 1999 Paper

X-ray evolving universe spectroscopy mission (XEUS): narrow-field imaging high-resolution spectrometer instrument: I

Peter Verhoeve, Anthony Peacock, Marcos Bavdaz, Didier Martin, Nicola Rando, Abel Poelaert, Roland den Hartog, Lionel Duband

Proceedings Volume 3766, (1999) https://doi.org/10.1117/12.363631

KEYWORDS: X-rays, Superconductors, Tantalum, Lead, Quasiparticles, Spectroscopy, X-ray imaging, Image resolution, Hafnium, Phonons

Read Abstract +

Proceedings Article | 10 November 1998 Paper

Soft x-ray response of a 36-pixel superconducting tunnel junction array for high-resolution x-ray astronomy

Nicola Rando, Peter Verhoeve, Stefan Kraft, Roland den Hartog, Anthony Peacock, D. Goldie, R. Hart

Proceedings Volume 3445, (1998) https://doi.org/10.1117/12.330282

KEYWORDS: Sensors, X-rays, Superconductors, Tantalum, Electrodes, X-ray astronomy, Detector arrays, X-ray detectors, Absorption, Quasiparticles

Read Abstract +

Proceedings Article | 15 October 1997 Paper

Development of a superconducting-tunnel-junction array for x-ray astronomy

Roland den Hartog, Anthony Peacock, Peter Verhoeve, Fred Jansen, J. Verveer, Axel van Dordrecht, J. Salmi, R. Venn

Proceedings Volume 3114, (1997) https://doi.org/10.1117/12.283776

KEYWORDS: Electrodes, Magnetism, Niobium, Sensors, Electronics, X-rays, Superconductors, Phonons, X-ray detectors, Signal detection

Read Abstract +

Proceedings Article | 15 October 1997 Paper

Superconducting tunnel junctions as detectors for extreme-ultraviolet astronomy

Anthony Peacock, Peter Verhoeve, Marcos Bavdaz, Roland den Hartog, D. Perez, Abel Poelaert, Nicola Rando

Proceedings Volume 3114, (1997) https://doi.org/10.1117/12.278894

KEYWORDS: Extreme ultraviolet, Sensors, Superconductors, Niobium, Tantalum, Quasiparticles, Light emitting diodes, Spectral resolution, X-rays, Astronomy

Read Abstract +

Proceedings Article | 31 October 1996 Paper

Superconducting tunneling junctions: performance and physics of alternative barrier structures

Fred Jansen, Anthony Peacock, Nicola Rando, Peter Verhoeve, Roland den Hartog, J. Salmi, Ilkka Sunni

Proceedings Volume 2808, (1996) https://doi.org/10.1117/12.256024

KEYWORDS: Superconductors, Semiconducting wafers, Niobium, Particles, Photomasks, X-rays, Diagnostics, Signal detection, Aluminum, Physics

Read Abstract +

Proceedings Article | 31 October 1996 Paper

Performance of transmission filters for EUV and soft x-ray astronomy

Marcos Bavdaz, Anthony Peacock, Roland den Hartog, Abel Poelaert, Peter Underwood, Veli-Pekka Viitanen, Detlef Fuchs, Peter Bulicke, Stefan Kraft, Frank Scholze, Gerhard Ulm, Annesley Wright

Proceedings Volume 2808, (1996) https://doi.org/10.1117/12.256004

KEYWORDS: Niobium, Optical filters, X-rays, Aluminum, Silicon, Photons, Calcium, Transmission electron microscopy, X-ray astronomy, Multilayers

Read Abstract +

Showing 5 of 60 publications

Conference Committee Involvement (5)

Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray

16 June 2024 | Yokohama, Japan

Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray

17 July 2022 | Montréal, Québec, Canada

Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray

14 December 2020 | Online Only, California, United States

Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray

13 December 2020 | San Diego, California, United States

Optical and Infrared Interferometry

23 June 2008 | Marseille, France

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years