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Sueno, Y. (author), Baselmans, J.J.A. (author), Coppens, A. (author), Génova-Santos, R. T. (author), Hattori, M. (author), Karatsu, K. (author), Lee, K. (author), Suzuki, J. (author), Thoen, David (author)Understanding telescope pointing (i.e. line of sight) is important for observing the cosmic microwave background (CMB) and astronomical objects. The Moon is a candidate astronomical source for pointing calibration. Although the visible size of the Moon (30<sup>`</sup>) is larger than that of the planets, we can frequently observe the Moon...journal article 2024
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Kouwenhoven, K. (author), van Doorn, G.P.J. (author), Buijtendorp, B.T. (author), de Rooij, S.A.H. (author), Lamers, D. (author), Thoen, David (author), Murugesan, V. (author), Baselmans, J.J.A. (author), de Visser, P.J. (author)Parallel-plate capacitors (PPC) significantly reduce the size of superconducting microwave resonators, reducing the pixel pitch for arrays of single-photon energy-resolving kinetic inductance detectors (KIDs). The frequency noise of KIDs is typically limited by tunneling two-level systems (TLS), which originate from lattice defects in the...journal article 2024
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Tapia, Rodrigo Javier (author), Kourounioti, I. (author), Thoen, Sebastian (author), de Bok, M.A. (author), Tavasszy, Lorant (author)Crowdshipping (CS) is an emerging form of freight transport that is expected to reduce the externalities of urban freight transport. The supply of CS services originates from people with an intention to travel, who can choose to engage in a parcel delivery service as incidental carrier. The popular expectation is that this consolidation of...journal article 2023
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Kouwenhoven, K. (author), Fan, D. (author), Biancalani, Enrico (author), de Rooij, S.A.H. (author), Karim, A.T. (author), Smith, C.S. (author), Murugesan, Vignesh (author), Thoen, David (author), Baselmans, J.J.A. (author), de Visser, P.J. (author)Kinetic inductance detectors (KIDs) are superconducting energy-resolving detectors, sensitive to single photons from the near-infrared to ultraviolet. We study a hybrid KID design consisting of a β-phase tantalum (β-Ta) inductor and a Nb-Ti-N interdigitated capacitor. The devices show an average intrinsic quality factor Qi of 4.3×105±1.3×105....journal article 2023
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de Bok, M.A. (author), Eggers, Larissa (author), Thoen, Sebastiaan (author), de Jong, Gerard (author)1. Overview and motivation<br/><br/>The emergence of e-commerce in the past decade and the surging growth during the pandemic, partially at the cost of in-store shopping, have reinforced the need for a better representation of this type of consumer demand and its effects in urban transportation studies (Reiffer et al, 2021). Since this is a...poster 2022
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de Bok, M.A. (author), Thoen, Sebastiaan (author), Eggers, Larissa (author)1. Overview and motivation<br/>E-commerce is a rapidly developing segment within urban goods transportation. While currently making up only 5.5% of all kilometers driven by vans in the Netherlands (CBS, 2018), this segment is experiencing rapid growth. For example, in the Netherlands, the volume of parcel deliveries grew by 20% in 2018 (ACM,...poster 2022
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de Bok, M.A. (author), Thoen, Sebastiaan (author), Van den Berg, Monique (author), Spruijt, John (author)Het klimaatakkoord, milieu zones en zero emissie zones in steden en andere duurzame ontwikkelingen betekenen voor de logistieke sector dat de wereld veranderd. Zowel overheden als verladers en vervoerders bereiden zich voor op deze veranderingen. Prognoses en modelberekeningen kunnen hulp bieden bij het in kaart brengen van de te verwachte...conference paper 2022
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de Bok, M.A. (author), Thoen, Sebastiaan (author), Tavasszy, Lorant (author)Het reduceren van de CO2 uitstoot van wegvervoer is een uitdagende opgave voor het bereiken van de klimaatdoelstellingen. In het 'Fit for 55' programma van de EC wordt een 55% reductie van de CO2 uitstoot in 2030 gehanteerd ten opzichte van de uitstoot in 1991. De transitie die moet plaatsvinden zal gefaciliteerd moeten worden door een...conference paper 2022
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Subramaniam Rajkumar, Vetrivel (author), Musunuri, Shyam (author), Stefanov, Alexandru (author), Bruijns, Siem (author), de Wit, J.J. (author), Klaar, Danny (author), Louh, Amadou (author), Thoen, Arnaud (author), Palensky, P. (author)Paper ID – 0348conference paper 2022
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Buijtendorp, Bruno T. (author), Bueno, Juan (author), Thoen, David (author), Murugesan, Vignesh (author), Sberna, P.M. (author), Baselmans, J.J.A. (author), Vollebregt, S. (author), Endo, A. (author)Superconducting circuit elements used in millimeter-submillimeter (mm-submm) astronomy would greatly benefit from deposited dielectrics with small dielectric loss and noise. This will enable the use of multilayer circuit elements and thereby increase the efficiency of mm-submm filters and allow for a miniaturization of microwave kinetic...journal article 2022
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Baselmans, J.J.A. (author), Karatsu, K. (author), Llombart, Nuria (author), Rybak, M. (author), Bueno Lopez, J. (author), Buijtendorp, B.T. (author), Dabironezare, Shahab Oddin (author), Hähnle, S.A. (author), Pascual Laguna, A. (author), Thoen, David (author), Yates, S.J.C. (author), Endo, A. (author)Integrated superconducting spectrometer (ISS) technology will enable ultra-wideband, integral-field spectroscopy for (sub)millimeter-wave astronomy, in particular, for uncovering the dust-obscured cosmic star formation and galaxy evolution over cosmic time. Here, we present the development of DESHIMA 2.0, an ISS for ultra-wideband...journal article 2022
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Baselmans, J.J.A. (author), Facchin, F. (author), Pascual Laguna, A. (author), Bueno, J. (author), Thoen, David (author), Murugesan, V. (author), Llombart, Nuria (author), de Visser, P.J. (author)Aims. Future actively cooled space-borne observatories for the far-infrared, loosely defined as a 1-10 THz band, can potentially reach a sensitivity limited only by background radiation from the Universe. This will result in an increase in observing speed of many orders of magnitude. A spectroscopic instrument on such an observatory requires...journal article 2022
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Endo, A. (author), Pascual Laguna, Alejandro (author), Hähnle, S.A. (author), Karatsu, K. (author), Thoen, David (author), Murugesan, Vignesh (author), Baselmans, J.J.A. (author)Superconducting resonators and transmission lines are fundamental building blocks of integrated circuits for millimeter-submillimeter astronomy. Accurate simulation of radiation loss from the circuit is crucial for the design of these circuits because radiation loss increases with frequency, and can thereby deteriorate the system performance....journal article 2022
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Baselmans, J.J.A. (author), Endo, A. (author), Karatsu, K. (author), Hähnle, S. (author), Pascual Laguna, A. (author), Yates, S. (author), Ferrari, L. (author), Llombart, Nuria (author), Bueno Lopez, J. (author), Facchi, F. (author), Thoen, David (author), Murugesan, V. (author), van der werf, P. (author), de Visser, P.J. (author)Advances in far infrared astronomy have been, and will be, defined by instrument capabilities. Especially relevant is the development of imaging spectrometers for the wavelength range of 0.03-3 mm, which are not available at all at this moment. We will discuss recent advances in this field: First, we discuss the development of miniature on-chip...conference paper 2022
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Pascual Laguna, A. (author), Bueno Lopez, J. (author), Yates, S.J.C. (author), Ferrari, Lorenza (author), Murugesan, Vignesh (author), Thoen, David (author), Dabironezare, Shahab Oddin (author), Zhang, H. (author), Llombart, Nuria (author), Baselmans, J.J.A. (author)A focal plane array of extended-hemispherical silicon lenses coupled to aluminum coplanar-waveguide (CPW) Microwave Kinetic Inductance Detectors (MKIDs) has been designed to operate at 7.8 THz. Low-dispersive leaky-wave radiation has been used to efficiently illuminate the antireflection-coated lenses. To minimize the radiation loss from the...conference paper 2022
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Thoen, David (author), Murugesan, V. (author), Pascual Laguna, A. (author), Karatsu, K. (author), Endo, A. (author), Baselmans, J.J.A. (author)We present a "mix-and-match"process to create large structures with submicrometer features by combining UV contact lithography and 100 kV electron-beam lithography in a single layer of negative-tone resist: Micro-Resist-Technology ma-N1405. The resist is successfully applied for the fabrication of an on-chip terahertz spectrometer, where the...journal article 2022
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Buijtendorp, B.T. (author), Vollebregt, S. (author), Karatsu, K. (author), Thoen, David (author), Murugesan, V. (author), Kouwenhoven, K. (author), Hähnle, S.A. (author), Baselmans, J.J.A. (author), Endo, A. (author)Low-loss deposited dielectrics will benefit superconducting devices such as integrated superconducting spectrometers, superconducting qubits, and kinetic inductance parametric amplifiers. Compared with planar structures, multilayer structures such as microstrips are more compact and eliminate radiation loss at high frequencies. Multilayer...journal article 2022
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de Bok, M.A. (author), Tavasszy, Lorant (author), Thoen, Sebastiaan (author)Reducing emissions caused by urban freight transportation is an increasingly important policy objective for transportation planners around the world. New and innovative ways of data collection provide new possibilities to analyze these issues. In this paper we present MASS-GT, a new multi-agent simulation system for urban goods transport. The...journal article 2022
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Kouwenhoven, K. (author), Elwakil, I. (author), van Wingerden, J. (author), Murugesan, V. (author), Thoen, David (author), Baselmans, J.J.A. (author), de Visser, P.J. (author)Typical materials for optical Microwave Kinetic Inductance Detetectors (MKIDs) are metals with a natural absorption of ∼ 30–50% in the visible and near-infrared. To reach high absorption efficiencies (90–100%) the KID must be embedded in an optical stack. We show an optical stack design for a 60 nm TiN film. The optical stack is modeled as...journal article 2022
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Alfaro Barrantes, J.A. (author), Mastrangeli, Massimo (author), Thoen, David (author), Visser, Sten (author), Bueno Lopez, J. (author), Baselmans, J.J.A. (author), Sarro, Pasqualina M (author)This paper describes the microfabrication and electrical characterization of aluminum-coated superconducting through-silicon vias (TSVs) with sharp superconducting transition above 1 K. The sharp superconducting transition was achieved by means of fully conformal and void-free DC-sputtering of the TSVs with Al, and is here demonstrated in up...journal article 2021