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Caron, J.F. (author), Bäumer, S.M.B. (author)The aberrations of reflective optical systems with one plane of symmetry are investigated in the most general case, with freeform surfaces and possibly different locations of the tangential and sagittal object and image. In this first paper in a series of two, we establish generalized ray-tracing equations including transverse aberrations up to...article 2021
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Caron, J.F. (author), Bäumer, S.M.B. (author)The aberrations of reflective optical systems with planar symmetry are investigated in the most general case, with freeform surfaces and possibly different locations of the tangential and sagittal object and image. In this second and last paper, closed-form expressions are derived for the aberrations created by an individual mirror. We study two...article 2021
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Tosti, L. (author), van Zomeren, A. (author), Pels, J.R. (author), Comans, R.N.J. (author)This study evaluates the potential of biomass ash as raw clinker material and the infuence of biomass feedstock and thermal conversion technology on biomass ash properties. Methods: A set of criteria for biomass feedstock and ash properties (i.e. CaO/SiO2 ratio and burnability) are established. A large dataset was collected and the best...article 2021
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Pablo Sigüenza, C.P. (author), Cucurachi, S. (author), Tukker, A. (author)Among European countries, The Netherlands is boosting the transformation to a circular economy creat- ing and deploying circular business models across different sectors, including the home appliances sector. Although in recent years shared access-based business models have attracted the attention of the scien- tific community from a...article 2021
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Tosti, L. (author), van Zomeren, A. (author), Pels, J.R. (author), Comans, R.N.J. (author)Purpose: This study evaluates the potential of biomass ash as raw clinker material and the influence of biomass feedstock and thermal conversion technology on biomass ash properties. Methods: A set of criteria for biomass feedstock and ash properties (i.e. CaO/SiO2 ratio and burnability) are established. A large dataset was collected and the...article 2021
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de Jong, J.D. (author)Houtbouw heeft de toekomst. Dat is de overtuiging van Jan de Jong, projectleider ‘Hout in de bouw’ bij TNO. Maar waarom zien we dan nog zo weinig houten huizen in Nederland en wat zijn de voordelen van bouwen met hout?article 2021
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Pil, A. (author)TNO en Demcon Focal helpen bij het ontwerp en de bouw van het totale laser guide star-projectiesysteem voor de Extremely Large Telescope.article 2021
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van Ravensteijn, B.G.P. (author), Donkers, P.A.J. (author), Ruliaman, R.C. (author), Eversdijk, J. (author), Fischer, H. (author), Huinink, H.P. (author), Adan, O.C.G. (author)Efficient and cheap storage of energy from renewable resources presents a key technology to facilitate the ongoing energy transition. Storing heat in thermochemical materials (TCMs), such as salt hydrates, provides a promising concept to meet this demand. TCMs can capture heat reversibly and loss-free by relying on equilibrium hydration...article 2021
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Gruben, G. (author), Dillingh, B. (author), Kaldal, G.S. (author), Hoang, N.H. (author), Wollenweber, J. (author), Rørvik, G. (author), Thorbjornsson, I. (author), Nyhus, B. (author)Ultra-high temperature geothermal wells (>450 °C) have a large potential for increased energy yield as compared to conventional high-temperature geothermal wells (200-300 °C), but several research challenges must be resolved before robust operation in this temperature range can be achieved. In this study, yield- and tensile strength data for...article 2021
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Prabowo, B. (author), Zheng, G. (author), Mehrpoo, M. (author), Patra, B. (author), Harvey-Collard, P. (author), Dijkema, J. (author), Sammak, A. (author), Scappucci, G. (author), Charbon, E. (author), Sebastiano, F. (author), Vandersypen, L.M.K. (author), Babaie, M. (author)Quantum computers (QC) promise to solve certain computational problems exponentially faster than a classical computer due to the superposition and entanglement properties of quantum bits (qubits). Among several qubit technologies, spin qubits are a promising candidate for large-scale QC, since (1) they have a small footprint allowing them to be...conference paper 2021
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Keijzer, E.E. (author), Klerks, S.A.W. (author), van Leeuwen, S.L. (author), Nijman, R.E. (author), Fraanje, P.J. (author)TNO analyseerde in een verkennende studie wat de gevolgen zouden zijn wanneer de tijdelijke vastlegging van CO2 in houtbouw wel zou worden meegenomen in de wettelijk verplichte duurzaamheidstoets, de Milieu Prestatie Gebouwen (MPG). Dit zogenaamde biogene CO2 telt nu nog niet mee in deze bepalingsmethode. Hout staat als industrieel...report 2021
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Kenworthy, C.F. (author), Stoevelaar, L.P. (author), Alexander, A.J. (author), Gerini, G. (author)In this paper, we report the effect of optical trapping on the enhancement factor for Raman spectroscopy, using a dielectric metasurface. It was found that a higher enhancement factor (up to 275%) can be obtained in a substrate immersed in water, where particles are freee to move, compared to a dried substrate, where the particles (radius r = 9...article 2021
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Saathof, R. (author), Meskers, A.J.H. (author), van Kempen, F.C.M. (author), Witvoet, G. (author), Korevaar, C.W. (author), de Lange, T.J. (author), Crowcombe, E.E. (author), Fritz, E.C. (author), van de Pol, M. (author)Optical satellite communications is a maturing technology to enable word-wide access to high throughput internet. In the past years a lot of effort has been taken to increase the applicability and the TRL of this technology. In collaboration with industry, TNO initiated several developments for space and ground technologies. Many of these...conference paper 2021
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- Molkenboer, F.T. (author), Jansen, R. (author), van Werkhoven, W.P. (author), Mulckhuyse, W.F.W. (author), van Schreven, E.L.C. (author), de Roode, B.J.M. (author), Haasnoot, H.J. (author), Abutan, A. (author), van der Valk, N.C.J. (author), Luijkx, T.S. (author) public lecture 2021
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- Emmelkamp, J. (author) public lecture 2021
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Stephan, U. (author), Steinke, O. (author), Ushakov, A. (author), Verlaan, A.L. (author), de Bock, M. (author), Moser, L. (author), Maniscalco, M.P. (author), van Beekum, E.R.J. (author), Verhoeff, P. (author)The Visible Spectroscopy Reference System (55.E6.VSRS) is going to be one of the first optical diagnostic systems in the ITER tokamak chamber, for which plasma cleaning system of front-end optics has to be implemented. In order to extract light out of the fusion plasma towards diagnostic sensor systems, a set of optics forming a labyrinth will...article 2021
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Cani, D. (author), van der Waal, J.C. (author), Pescarmona, P.P. (author)A series of photocatalysts consisting of C- and N-doped titanium dioxide (TiO2) nanoparticles highly dispersed and firmly embedded at the surface of a silica matrix were prepared using a novel synthesis method in which activated carbon has a double role: it acts as support for depositing the TiO2 nanoparticles and as hard template for generating...article 2021
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Arocho, C. (author)Nadat ze vorig jaar aankondigden te gaan samenwerken aan advanced free-space optics (FSO) voor gebruik in 5G-connectiviteit, hebben TNO en Aircision nu de succesvolle afronding van de eerste veldtests bekendgemaakt. In de tests, uitgevoerd over een afstand van 2,5 km tussen de toren van TNO’s lasercommunicatiefaciliteit aan de Oude...article 2021
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- Emmelkamp, J. (author) public lecture 2021
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Hendrickx, N.W. (author), Lawrie, W.I.L. (author), Russ, M. (author), van Riggelen, F. (author), de Snoo, S.L. (author), Schouten, R.N. (author), Sammak, A. (author), Scappucci, G. (author), Veldhorst, M. (author)The prospect of building quantum circuits using advanced semiconductor manufacturing makes quantum dots an attractive platform for quantum information processing. Extensive studies of various materials have led to demonstrations of two-qubit logic in gallium arsenide, silicon and germanium. However, interconnecting larger numbers of qubits in...article 2021