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Ushakov, A. (author), van Veldhoven, J. (author), Rijnsent, C.G.J. (author), Yatsuka, E. (author), Verlaan, A.L. (author), Stephan, U. (author), Steinke, O. (author), Maniscalco, M.P. (author), Moser, L. (author), Bassan, M. (author), Yokoyama, M. (author), Beekum, E.R.J. (author), Takaki, H. (author)The ITER Edge Thomson scattering (ETS) system provides electron temperature and density profile measurements in the ITER tokamak. In collection optics, the front-end metallic first and second mirrors are expected to experience contamination with beryllium, tungsten and construction materials. Plasma cleaning based on a low-pressure...article 2023
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Aiello, S. (author), Buis, E.J. (author), van der Knaap, F.G.P. (author)The optical data transport system of the KM3NeT neutrino telescope at the bottom of the Mediterranean Sea will provide more than 6000 optical modules in the detector arrays with a point-to-point optical connection to the control stations onshore. The ARCA and ORCA detectors of KM3NeT are being installed at a depth of about 3500 m and 2500 m,...article 2023
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Mast, S. (author), Dreischer, T. (author), den Breeje, R. (author), Borst, G. (author), Glas, A.H. (author), Nalla, R. (author), Greven, A. (author)Robust laser beam pointing, acquisition and tracking capabilities are key to enable the next generation of laser communication applications. This paper highlights key elements of the design concept, performance simulations and test results of Lighthouse, a wavelength-agnostic and externally mountable high-power beacon for use in optical ground...conference paper 2023
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Radhakrishnan, V.M. (author), Keller, C.U. (author), Doelman, N.J. (author), Por, E.H. (author)The focal-plane contrast of exoplanet imagers is affected by non-common path aberrations (NCPAs) that the adaptive optics system cannot correct for because they occur after the wavefront has been measured. NCPA estimation is commonly based on the long-exposure science image. Phase retrieval algorithms are often used, and they mostly assume that...article 2023
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Ntziachristos, L., (author), Mamarikas, S., (author), Verbeek, R.P. (author), Grigoriadis, A. (author)This paper presents the measurement techniques deployed by the European funded SCIPPER project in order to identify their potential in assisting regulatory authorities to enforce the new emission limits for shipping. On-board sensors, sniffer remote and remote optical devices were extensively used in field campaigns to measure over 1000 ship...conference paper 2023
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Silvestri, F. (author), Feenstra, L.W. (author), Pettazzi, F. (author), Nijenhuis, J.R. (author), de Vreugd, J. (author), de Bruijn, D. (author), den Breeje, R. (author), Klop, W.A. (author), Ferrario, I. (author)High throughput optical satellite communication (SATCOM) systems need to rely on effective and robust technology to enable wavelength-division multiplexing (WDM) in a commercially viable way. The main challenge to implement WDM in optical feeder links deals with the multiplexing of high power channels. Currently the levels of power required for...conference paper 2022
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Dinkelman, D. (author), Carpentier, S.F.A. (author), Koenen, M. (author), Oerlemans, P. (author), Godschalk, B. (author), Peters, E. (author), Bos, W. (author), Vrijlandt, M.A.W. (author), van Wees, J.D.A.M. (author)In 2021, the first full scale high-temperature aquifer thermal energy storage (HT-ATES) system became operational in Middenmeer, the Netherlands. The system is operated by ECW Energy and realized within the framework of the GEOTHERMICA HEATSTORE project. A dedicated monitoring program, including distributed heating sensors (distributed...conference paper 2022
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Nijenhuis, J.R. (author), Jonker, W.A. (author), Kamphues, F.G. (author)TNO, in close cooperation with Demcon, has designed the Laser Projection Subsystem (LPS) for ESO’s Extremely Large Telescope (ELT). The ELT LPS will consist of up to 8 laser projection subunits. The design is based on the Four Laser Guide Star Facility (4LGSF), built for the ESO Very Large Telescope (VLT) (5). The VLT AO system has been...conference paper 2022
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BuendDia, V.G. (author), Podilchak, S.K. (author), Liberto, S. (author), Walkinshaw, T. (author), Constantinides, C. (author), Anagnostou, D.E. (author), Goussetis, G. (author), Vorst, M.V.D. (author)A miniaturized planar Yagi-Uda antenna for integration with PicoSats or other SmallSat missions is proposed. Miniaturization techniques, such as meandering and 1-D artificial dielectric concepts to reduce the guided wavelength, are employed to overcome space constraints imposed by the SmallSat footprint while still maintaining good performance...article 2022
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Derkink, F.M. (author), Doelman, D. (author), van Dam, D. (author), Brenny, B.J.M. (author), Speet, B.G. (author), van Brug, H. (author), Keller, C. (author), Snik, F. (author)While the concentrations of trace gases in Earth’s atmosphere were roughly constant for thousands of years, human activities such as the burning of fossil fuels have caused significant changes ever since the industrial revolution. The remote sensing of trace gases has proved to be a useful technique for mapping and monitoring on the global scale...conference paper 2022
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Werkhoven, P. (author), Bouwman, J. (author), van Diggelen, J. (author), Dijk, J. (author), van der Meulen, M. (author), Neerincx, M. (author), Raaijmakers, S. (author), van Veenstra, A.F. (author)TNO has lived up to its motto ‘Innovation for life’ by playing a significant part in this digital revolution, with major breakthroughs in computer simulation, network transactions, wireless communication, cyber security, optical satellite communication and quantum computing.report 2022
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Korevaar, C.W. (author), Boschma, J.J. (author), den Breeje, R. (author), Ebert, J. (author)Optical feeder links (OFLs) benefit from the vast amount of bandwidth available in the THz-regime of the electro-magnetic spectrum, and could enable future terabit-per-second satellite systems. This study assesses the end-to-end performance of analog coherent OFLs for digital video broadcasting (DVB) applications, employing phase modulation (PM)...conference paper 2022
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Harvey-Collard, P. (author), Dijkema, J. (author), Zheng, G. (author), Sammak, A. (author), Scappucci, G. (author), Vandersypen, L.M.K. (author)We report the coherent coupling of two electron spins at a distance via virtual microwave photons. Each spin is trapped in a silicon double quantum dot at either end of a superconducting resonator, achieving spin-photon couplings up to around gs/2π = 40 MHz. As the two spins are brought into resonance with each other, but detuned from the...article 2022
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Wezeman, R.S. (author), Chiscop, I. (author), Anitori, L. (author), van Rossum, W.L. (author)Compressive sensing is a signal processing technique used to acquire and reconstruct sparse signals using significantly fewer measurement samples. Compressive sensing requires finding the most sparse solution to an underdetermined linear system, which is an NP-hard problem and as a consequence in practise is only solved approximately. In our...conference paper 2022
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Donnot, A. (author), Edmunds, J. (author), Hammond, N. (author), Welch, M. (author), Kean, P. (author), Kehayas, E. (author), Hagen, R.A.J. (author), Yadav, S. (author), Medenblik, H.J.W. (author), Cheng, L.K. (author), Bulgarini, G. (author), Dresscher, M. (author)The High Photon Efficiency (HPE) standard is a promising approach for, low Size, Weight and Power (SWaP) optical terminal for space communications. In this paper, we report the creation of a breadboard demonstrator CCSDS compliant HPE source, capable of a Pulse Position Modulation (PPM) order of 256 with an average power of 4W and kW level peak...conference paper 2022
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Feleki, B.T. (author), Bouwer, R.K.M. (author), Zardetto, V. (author), Wienk, M.M. (author), Janssen, R.A.J. (author)An efficient substrate-configuration p-i-n metal-halide perovskite solar cell (PSC) is fabricated on a polymer-coated steel substrate. The optimized cell employs a Ti bottom electrode coated with a thin indium tin oxide (ITO) interlayer covered with a self-assembled [2-(9H-carbazol-9-yl)ethyl]phosphonic acid monolayer as a hole-selective contact...article 2022
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Jin, J. (author), Pang, M. (author), Segers, A. (author), Han, W. (author), Fang, L. (author), Li, B. (author), Feng, H. (author), Lin, H.X. (author), Liao, H. (author)Last spring, super dust storms reappeared in East Asia after being absent for one and a half decades. The event caused enormous losses in both Mongolia and China. Accurate simulation of such super sandstorms is valuable for the quantification of health damage, aviation risks, and profound impacts on the Earth system, but also to reveal the...article 2022
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Bowens-Rubin, R. (author), Bos, A. (author), Hinz, P. (author), Holden, B. (author), Radovan, M. (author)As we enter the era of TESS and JWST, instrumentation that can carry out radial velocity measurements of exoplanet systems is in high demand. We will address this demand by upgrading the UC Lick Observatory’s 2.4-meter Automated Planet Finder (APF) telescope with an adaptive optics (AO) system. The AO upgrade will be directly integrated into the...conference paper 2022
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Chun, M.R. (author), Ryan, A. (author), Zhang, R. (author), Kuiper, S. (author), Ackaert, G. (author), Baranec, C. (author), Baeten, M.J.J. (author), Bos, A. (author), Bowens-Rubin, R. (author), Dekker, A. (author), Dungee, R. (author), Gupta, T. (author), Hinz, P. (author), Jonker, W.A. (author), Kamphues, F.G. (author), Lai, O. (author), Lu, J. (author), Maniscalco, M.P. (author), Monna, B. (author), Nair, M. (author), Nijenhuis, J.R. (author), Priem, H. (author), Vogel, P.A. (author)We report on progress at the University of Hawaii on the integration and testing setups for the adaptive secondary mirror (ASM) for the University of Hawaii 2.2-meter telescope on Maunakea, Hawaii. We report on the development of the handling fixtures and alignment tools we will use along with progress on the optical metrology tools we will use...conference paper 2022
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Pohl, R. (author), Blok, C. (author), Simmelink, K. (author), Biesheuvel, R. (author), Resink, S. (author), Nijenhuis, J.R. (author), van Riel, M.C.J.M. (author), Kamphues, F.G. (author), Calia, D.B. (author), Hackenberg, W. (author)We report on the development of a Beam Conditioning and Diagnostics System (BCDS) that will be employed in the Laser Projection System (LPS) of the Extremely Large Telescope (ELT) of ESO. This conference article provides an overview about the detailed design of the BCDS and it summarizes the work of the development phase of this project. To this...conference paper 2022