Dr. Valentín Martinez Pillet Profile

Dr. Valentín Martinez Pillet

Director at National Solar Observatory

SPIE Involvement:

Author

Publications (15)

Proceedings Article | 6 July 2018 Paper

Paper

Construction update of the Daniel K. Inouye Solar Telescope project

Mark Warner, Thomas Rimmele, Valentin Pillet, Roberto Casini, Steve Berukoff, Simon Craig, Andrew Ferayorni, Bret Goodrich, Robert Hubbard, David Harrington, Paul Jeffers, Erik Johansson, Ruth Kneale, Jeff Kuhn, Chen Liang, Haosheng Lin, Heather Marshall, Mihalis Mathioudakis, William McBride, Joseph McMullin, William McVeigh, Predrag Sekulic, Wolfgang Schmidt, Steve Shimko, Stacey Sueoka, Rich Summers, Alexandra Tritschler, Timothy Williams, Friedrich Wöger

Proceedings Volume 10700, 107000V (2018) https://doi.org/10.1117/12.2314212

KEYWORDS: Telescopes, Optical fabrication, Cameras, Mirrors, Control systems, Solar processes, Observatories, Polarimetry, Imaging systems, Polarization

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Construction of the Daniel K. Inouye Solar Telescope (DKIST) is well underway on the Haleakalā summit on the Hawaiian island of Maui. Featuring a 4-m aperture and an off-axis Gregorian configuration, the DKIST will be the world’s largest solar telescope. It is designed to make high-precision measurements of fundamental astrophysical processes and produce large amounts of spectropolarimetric and imaging data. These data will support research on solar magnetism and its influence on solar wind, flares, coronal mass ejections, and solar irradiance variability. Because of its large aperture, the DKIST will be able to sense the corona’s magnetic field—a goal that has previously eluded scientists—enabling observations that will provide answers about the heating of stellar coronae and the origins of space weather and exo-weather. The telescope will cover a broad wavelength range (0.35 to 28 microns) and operate as a coronagraph at infrared (IR) wavelengths. Achieving the diffraction limit of the 4-m aperture, even at visible wavelengths, is paramount to these science goals. The DKIST’s state-of-the-art adaptive optics systems will provide diffraction-limited imaging, resolving features that are approximately 20 km in size on the Sun.

At the start of operations, five instruments will be deployed: a visible broadband imager (VTF), a visible spectropolarimeter (ViSP), a visible tunable filter (VTF), a diffraction-limited near-IR spectropolarimeter (DLNIRSP), and a cryogenic near-IR spectropolarimeter (cryo-NIRSP). At the end of 2017, the project finished its fifth year of construction and eighth year overall. Major milestones included delivery of the commissioning blank, the completed primary mirror (M1), and its cell. Commissioning and testing of the coudé rotator is complete and the installation of the coudé cleanroom is underway; likewise, commissioning of the telescope mount assembly (TMA) has also begun. Various other systems and equipment are also being installed and tested. Finally, the observatory integration, testing, and commissioning (IT&C) activities have begun, including the first coating of the M1 commissioning blank and its integration within its cell assembly. Science mirror coating and initial on-sky activities are both anticipated in 2018.

Proceedings Article | 6 July 2018 Paper

Paper

Design of a next generation synoptic solar observing network: solar physics research integrated network group (SPRING)

Sanjay Gosain, Markus Roth, Frank Hill, Alexei Pevtsov, Valentin Pillet, Michael Thompson

Proceedings Volume 10702, 107024H (2018) https://doi.org/10.1117/12.2306555

KEYWORDS: Magnetism, Telescopes, Solar processes, Iron, Doppler effect, Mirrors, Observatories, Sun, Signal to noise ratio, Space telescopes

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Long-term synoptic observations of the Sun in different wavelength regions are essential to understand its secular behavior. Such observations have proven very important for discovery of 11 year solar activity cycle, 22 year magnetic cycle, polar field reversals, Hale’s polarity law, Joy’s law, that helped Babcock and Leighton to propose famous solar dynamo model. In more recent decades, the societal impact of the secular changes in Sun’s output has been felt in terms of solar inputs to terrestrial climate-change and space-weather hazards. Further, it has been realized that to better understand the activity phenomena such as flares and coronal mass ejections (CMEs) one needs synoptic observations in multiple spectral lines to enable tomographic inference of physical parameters. Currently, there are both space and ground based synoptic observatories. However, given the requirements for the long-term stability and reliability of such synoptic datasets, ground-based facilities are more preferable. Also, the ground based observatories are easy to maintain or upgrade while detailed and frequent calibrations are easily possible. The only ground-based facility that currently provides full-disk velocity and magnetic field maps of the Sun around the clock and at good cadence, is the Global Oscillations Network Group (GONG) network of National Solar Observatory (NSO) which is operational since the mid 90s. Due to its aging instrumentation, operating for nearly three decades, and new requirements to obtain multiwavelength observations, a need is felt in the solar community to build a next generation synoptic observatory network. A group of international observatories have come together under the auspices of SOLARNET program, funded by European Union (EU), to carryout a preliminary design study of such a synoptic solar observing facility called “SPRING”, which stands for Solar Physics Research Integrated Network Group. In this article we will present concept of SPRING and the optical design concept of its major instruments.ts.

Proceedings Article | 18 August 2016 Paper

Paper

Construction status of the Daniel K. Inouye solar telescope

Joseph McMullin, Thomas Rimmele, Mark Warner, Valentin Pillet, Roberto Casini, Steve Berukoff, Simon Craig, David Elmore, Andrew Ferayorni, Bret Goodrich, Robert Hubbard, David Harrington, Steve Hegwer, Paul Jeffers, Erik Johansson, Jeff Kuhn, Haosheng Lin, Heather Marshall, Mihalis Mathioudakis, William McBride, William McVeigh, LeEllen Phelps, Wolfgang Schmidt, Steve Shimko, Stacey Sueoka, Alexandra Tritschler, Timothy Williams, Friedrich Wöger

Proceedings Volume 9906, 99061B (2016) https://doi.org/10.1117/12.2235227

KEYWORDS: Imaging systems, Observatories, Solar processes, Telescopes, Mirrors, Optical fabrication, Buildings, Space telescopes, Control systems, Deformable mirrors

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We provide an update on the construction status of the Daniel K. Inouye Solar Telescope. This 4-m diameter facility is designed to enable detection and spatial/temporal resolution of the predicted, fundamental astrophysical processes driving solar magnetism at their intrinsic scales throughout the solar atmosphere. These data will drive key research on solar magnetism and its influence on solar winds, flares, coronal mass ejections and solar irradiance variability. The facility is developed to support a broad wavelength range (0.35 to 28 microns) and will employ state-of-the-art adaptive optics systems to provide diffraction limited imaging, resolving features approximately 20 km on the Sun. At the start of operations, there will be five instruments initially deployed: Visible Broadband Imager (VBI; National Solar Observatory), Visible SpectroPolarimeter (ViSP; NCAR High Altitude Observatory), Visible Tunable Filter (VTF (a Fabry-Perot tunable spectropolarimeter); Kiepenheuer Institute for Solarphysics), Diffraction Limited NIR Spectropolarimeter (DL-NIRSP; University of Hawaii, Institute for Astronomy) and the Cryogenic NIR Spectropolarimeter (Cryo-NIRSP; University of Hawaii, Institute for Astronomy).

As of mid-2016, the project construction is in its 4th year of site construction and 7th year overall. Major milestones in the off-site development include the conclusion of the polishing of the M1 mirror by University of Arizona, College of Optical Sciences, the delivery of the Top End Optical Assembly (L3), the acceptance of the Deformable Mirror System (Xinetics); all optical systems have been contracted and are either accepted or in fabrication. The Enclosure and Telescope Mount Assembly passed through their factory acceptance in 2014 and 2015, respectively. The enclosure site construction is currently concluding while the Telescope Mount Assembly site erection is underway. The facility buildings (Utility and Support and Operations) have been completed with ongoing work on the thermal systems to support the challenging imaging requirements needed for the solar research.

Finally, we present the construction phase performance (schedule, budget) with projections for the start of early operations.

SPIE Journal Paper | 11 December 2015 Open Access

Open Access

ADAHELI+: exploring the fast, dynamic Sun in the x-ray, optical, and near-infrared

Francesco Berrilli, Paolo Soffitta, Marco Velli, Paolo Sabatini, Alberto Bigazzi, Ronaldo Bellazzini, Luis Ramon Bellot Rubio, Alessandro Brez, Vincenzo Carbone, Gianna Cauzzi, Fabio Cavallini, Giuseppe Consolini, Fabio Curti, Dario Del Moro, Anna Di Giorgio, Ilaria Ermolli, Sergio Fabiani, Marianne Faurobert, Alex Feller, Klaus Galsgaard, Szymon Gburek, Fabio Giannattasio, Luca Giovannelli, Johann Hirzberger, Stuart Jefferies, Maria Madjarska, Fabio Manni, Alessandro Mazzoni, Fabio Muleri, Valentina Penza, Giovanni Peres, Roberto Piazzesi, Francesca Pieralli, Ermanno Pietropaolo, Valentín Martinez Pillet, Michele Pinchera, Fabio Reale, Paolo Romano, Andrea Romoli, Marco Romoli, Alda Rubini, Pawel Rudawy, Paolo Sandri, Stefano Scardigli, Gloria Spandre, Sami Solanki, Marco Stangalini, Antonio Vecchio, Francesca Zuccarello

JATIS, Vol. 1, Issue 04, 044006, (December 2015) https://doi.org/10.1117/12.10.1117/1.JATIS.1.4.044006

KEYWORDS: Solar processes, Magnetism, X-rays, Sun, Polarimetry, Mirrors, X-ray optics, Satellites, Telescopes, Space telescopes

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Proceedings Article | 22 July 2014 Paper

Paper

Construction status of the Daniel K. Inouye Solar Telescope

Joseph McMullin, Thomas Rimmele, Valentin Martínez Pillet, Thomas Berger, Roberto Casini, Simon Craig, David Elmore, Bret Goodrich, Steve Hegwer, Robert Hubbard, Erik Johansson, Jeffrey Kuhn, Haosheng Lin, William McVeigh, Wolfgang Schmidt, Steve Shimko, Alexandra Tritschler, Mark Warner, Friedrich Wöger

Proceedings Volume 9145, 914525 (2014) https://doi.org/10.1117/12.2055483

KEYWORDS: Observatories, Solar telescopes, Optical fabrication, Telescopes, Astronomy, Adaptive optics, Visible radiation, Control systems, Sun, Solar processes

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Proceedings Article | 7 October 2011 Paper

Paper

Space-qualified liquid-crystal variable retarders for wide-field-of-view coronagraphs

N. Uribe-Patarroyo, A. Alvarez-Herrero, P. García Parejo, J. Vargas, R. Heredero, R. Restrepo, V. Martínez Pillet, J. del Toro Iniesta, A. López, S. Fineschi, G. Capobianco, M. Georges, M. López, G. Boer, I. Manolis

Proceedings Volume 8148, 814810 (2011) https://doi.org/10.1117/12.904919

KEYWORDS: Polarimetry, Ultraviolet radiation, Wave plates, Aerospace engineering, Manufacturing, Liquid crystals, Coronagraphy, Radiation effects, Polarization, Birefringence

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Proceedings Article | 10 September 2011 Paper

Paper

Imaging polarimeters based on liquid crystal variable retarders: an emergent technology for space instrumentation

A. Alvarez-Herrero, N. Uribe-Patarroyo, P. García Parejo, J. Vargas, R. Heredero, R. Restrepo, V. Martínez-Pillet, J. C. del Toro Iniesta, A. López, S. Fineschi, G. Capobianco, M. Georges, M. López, G. Boer, I. Manolis

Proceedings Volume 8160, 81600Y (2011) https://doi.org/10.1117/12.892732

KEYWORDS: Liquid crystals, Polarimetry, Polarization, Ultraviolet radiation, Tolerancing, Glasses, Molecules, Birefringence, Modulation, Wavefronts

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Proceedings Article | 19 July 2010 Paper

Paper

Flight control software for the wave-front sensor of SUNRISE 1m balloon telescope

Alexander Bell, Peter Barthol, Thomas Berkefeld, Bernhard Feger, Achim Gandorfer, Frank Heidecke, Michael Knoelker, Valentin Pillet, Wolfgang Schmidt, Michael Sigwarth, Sami Solanki, Dirk Soltau, Alan Title

Proceedings Volume 7740, 774003 (2010) https://doi.org/10.1117/12.857003

KEYWORDS: Telescopes, Sensors, Picosecond phenomena, Space telescopes, Mirrors, Control systems, Telecommunications, Computing systems, Cameras

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Proceedings Article | 7 July 2006 Paper

Paper

Detailed design of the imaging magnetograph experiment (IMaX): a visible imager magnetograph for the Sunrise mission

A. Álvarez-Herrero, T. Belenguer, C. Pastor, L. González, R. Heredero, G. Ramos, M. Reina, A. Sánchez, J. Villanueva, L. Sabau, V. Martínez Pillet, J. Bonet, M. Collados, L. Jochum, E. Ballesteros, J. Medina Trujillo, Cobo Ruiz, J. González, J. del Toro Iniesta, A. López Jiménez, J. Castillo Lorenzo, M. Herranz, J. Jerónimo, P. Mellado, R. Morales, J. Rodríguez, V. Domingo, J. Gasent, P. Rodríquez

Proceedings Volume 6265, 62654C (2006) https://doi.org/10.1117/12.672117

KEYWORDS: Fabry–Perot interferometers, Imaging systems, Telescopes, Solar processes, Polarization, Sensors, Cameras, Magnetism, Polarimetry, Charge-coupled devices

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Proceedings Article | 23 June 2006 Paper

Paper

SUNRISE: high-resolution UV/VIS observations of the Sun from the stratosphere

A. Gandorfer, S. Solanki, P. Barthol, B. Lites, V. Martínez Pillet, W. Schmidt, D. Soltau, A. Title

Proceedings Volume 6267, 62670S (2006) https://doi.org/10.1117/12.672828

KEYWORDS: Telescopes, Magnetism, Image filtering, Mirrors, Optical filters, CCD cameras, Sun, Solar processes, Wavefront sensors, Polarization

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Proceedings Article | 14 June 2006 Paper

Paper

Lithium niobate Fabry-Perot etalons in double-pass configuration for spectral filtering in the visible imager magnetograph IMaX for the SUNRISE mission

A Álvarez-Herrero, T. Belenguer, C. Pastor, R. Heredero, G. Ramos, V. Martínez Pillet, J. A. Bonet Navarro

Proceedings Volume 6265, 62652G (2006) https://doi.org/10.1117/12.671966

KEYWORDS: Fabry–Perot interferometers, Wavefronts, Reflectivity, Polishing, Imaging systems, Lithium niobate, Telescopes, Polarization, Refractive index, Optical filters

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Proceedings Article | 12 October 2004 Paper

Paper

The imaging magnetograph eXperiment for the SUNRISE balloon Antarctica project

Valentin Martinez Pillet, Jose Bonet, Manuel Collados, Lieselotte Jochum, S. Mathew, J.L. Medina Trujillo, B. Ruiz Cobo, Jose Carlos del Toro Iniesta, A.C. Lopez Jimenez, J. Castillo Lorenzo, M. Herranz, J.M. Jeronimo, P. Mellado, R. Morales, J. Rodriguez, Alberto Alvarez-Herrero, Tomas Belenguer, R.L. Heredero, M. Menendez, G. Ramos, Manuel Reina, C. Pastor, A. Sanchez, J. Villanueva, Vicente Domingo, J.L. Gasent, P. Rodriguez

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.549020

KEYWORDS: Fabry–Perot interferometers, Magnetism, Sensors, Wavefronts, Charge-coupled devices, Electronics, Diffraction, Modulation, Cameras, Reflectivity

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Proceedings Article | 28 September 2004 Paper

Paper

SUNRISE: high-resolution UV/VIS observations of the Sun from the stratosphere

Achim Gandorfer, Sami Solanki, Manfred Schussler, Werner Curdt, Bruce Lites, Valentin Martinez Pillet, Wolfgang Schmidt, Alan Title

Proceedings Volume 5489, (2004) https://doi.org/10.1117/12.549119

KEYWORDS: Magnetism, Telescopes, Mirrors, CCD cameras, Optical filters, Image filtering, Solar processes, Sun, Polarimetry, Imaging systems

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Proceedings Article | 14 February 2003 Paper

Paper

IMaX: a magnetograph for SUNRISE

Lieselotte Jochum, Manuel Collados, Valentin Martinez Pillet, Jose Bonet, Jose Carlos del Toro Iniesta, Antonio Lopez, Alberto Alvarez-Herrero, Manuel Reina, Juan Fabregat, Vicente Domingo

Proceedings Volume 4843, (2003) https://doi.org/10.1117/12.459379

KEYWORDS: Fabry–Perot interferometers, Polarization, Telescopes, Polarimetry, Sensors, Spectral resolution, Optical design, Refractive index, Mirrors, Modulation transfer functions

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Proceedings Article | 11 February 2003 Paper

Paper

SUNRISE: a balloon-borne telescope for high resolution solar observations in the visible and UV

Sami Solanki, Achim Gandorfer, Manfred Schuessler, W. Curdt, Bruce Lites, Valentin Martinez-Pillet, Wolfgang Schmidt, Alan Title

Proceedings Volume 4853, (2003) https://doi.org/10.1117/12.460283

KEYWORDS: Magnetism, Telescopes, Mirrors, Solar processes, Optical filters, CCD cameras, Ultraviolet radiation, Polarimetry, Sun, Polarization

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Showing 5 of 15 publications

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